Which Windows interface element typically appears to display information, a warning, an error message, or a request for confirmation?
A
Window
B
Pop-up menu
C
Message box
D
Taskbar
Question 2Single Answer
What is active desktop ?
A
a term that is synonymous with viewing your desktop as web page
B
a feature to customize your desktop to display informating you can update from the internet
C
both a and b above mentioned
D
A software
E
None of these
Question 3Single Answer
What is meant by an active window?
A
A window that is minimized
B
The window currently receiving user input
C
Any window currently open
D
The window opened first
Question 4Single Answer
Yojna a weekly journal
A
Ministry of Financeย ย ย ย ย
B
Ministry of Information and Broadcastin
C
Ministry of Rural Development
D
Planning Commission
Question 5Single Answer
Kurukshetra a journal on rural development is published by
A
Ministry of Financeย
B
Ministry of Information and Broadcastin
C
Ministry of Rural Development
D
Planning Commission
Question 6Single Answer
Devaluation of a currency means
A
Fixing the value of the currency in conjuction with the movement in the value of a basket of predetermined currencies
B
Reduction in the value of a currency vis-à-vis major internationally traded currencies
C
Fixing the value of currency in multilateral consultaion with the IMF the World Bank and major trading partners
D
Permitting the currency to seek its worth in the international market
Question 7Single Answer
In India rural incomes are generally lower than the urban incomes, which of the following reasons account for this
ย ย ย ย ย ย 1. a large number of farmers are illiterate and know little about scientific agriculture
ย ย ย ย ย ย ย ย ย ย ย 2. prices of primary products are lower than those of manufactured products
ย ย ย ย ย ย ย ย ย ย ย 3. Investments in agriculture has been low when compared to investment in industry
A
1 and 3
B
2 and 3
C
1 and 2
D
1,2 and 3
Question 8Single Answer
Which of the following programmes aims at the promotion of savings among rural women
A
Rashtriya Mahila Kosh
B
Indira Mahila Yojna
C
Jawahar Rozgar Yojna
D
Mahila Samridhi Yojna
Question 9Single Answer
What is Net National Product
A
the money value of final goods and services produced annually in the economy
B
the money value of annual service generation in the economy
C
the money value of tangible goods produced annually in the economy
D
The money value of tangible goods available in the economy
Question 10Single Answer
Passage :
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z .
Which letter in this alphabet is the eighth letter to the right of the letter and which is tenth letter to the left of the last but one letter of the alphabet ?
A
X
B
W
C
I
D
H
Question 11Single Answer
Passage :
Directionย : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
If the third alphabet of each of the words is changed to the next alphabet in the English alphabetical series, which of the following will form a meaningful English word?
A
SUM
B
BIG
C
Both BIG and THE
D
FOR
E
Both FOR and BIG
Question 12Single Answer
Passage :
Direction : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
If the given words are arranged in the order as they would appear in a dictionary from left to right, which of the following will be second from the right ?
A
AND
B
FOR
C
THE
D
BIG
E
SUM
Question 13Single Answer
Passage :
Direction: The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
If second alphabet in each of the words is changed to next alphabet in the English alphabetical order, how many words having two vowels (same or different vowels) will be formed ?
A
None
B
One
C
Two
D
Three
E
Four
Question 14Single Answer
Passage :
Direction : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
How many letters are there in the English alphabetical series between the second letter of the word which is second from the right and the second letter of the word which is second from the left of the given words?
A
Two
B
Five
C
Six
D
Nine
E
Three
Question 15Single Answer
Passage :
Direction: The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
If in each of the given words, each of the consonant is changed to previous letter and each vowel is changed to next letter in the English alphabetical series, in how many words thus formed will no vowels appear?
A
None
B
One
C
Two
D
Three
E
More than three
Question 16Single Answer
Passage :
Direction : Following question is based on five words given below: BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)
If the third alphabet in each of the words is changed to the next alphabet in the English alphabetical order, how many words having two vowels (same or different vowels) will be formed?
A
None
B
One
C
Two
D
Three
E
Four
Question 17Single Answer
Passage :
Direction : Following question is based on five words given below: BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)
If the position of the first and the second alphabets of each of the words are interchanged, which of the following will form a meaningful English word?
A
Both CAT and OWN
B
Both BRU and INK
C
Only CAT
D
Only INK
E
Only LEG
Question 18Single Answer
Passage :
Direction: Following question is based on five words given below: BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)
If the given words are arranged in the order as they would appear in a dictionary from left to right, which of the following will be exactly in the middle of the five words?
A
OWN
B
LEG
C
BRU
D
CAT
E
INK
Question 19Single Answer
Passage :
Direction: Following question is based on five words given below: BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)
If in each of the given words, each of the consonants is changed to previous letter and each vowel is changed to next letter in the English alphabetical series, in how many words thus formed will the same alphabet appear twice?
A
None
B
One
C
Two
D
Three
E
More than three
Question 20Single Answer
Temperature can be expressed as derived quantity in terms of
A
length and mass
B
mass and time
C
length, mass and time
D
None of these
Question 21Single Answer
Which of the following is not a synthetic fibre:
A
Anygora
B
Rayon
C
Nylon
D
Polyster
Question 22Single Answer
Which of the following contain enzymes for cellular respiration ?
A
Dictyosomes
B
Endoplasmic reticulum
C
lysosomes
D
Mitochondria
Question 23Single Answer
"Who said, 'India was a parrot unto itself'?
A
Malik Muhammad Joyce
B
Raskhan
C
Rich Khusrow
D
Rich Hasan
Question 24Single Answer
What was the real name of Amir Khusro?
A
Muhammad Hasan
B
Muhammad Hussain
C
Muhammad Khusrow
D
Muhammad Mine
Question 25Single Answer
Which is the national game of Bhutan ?
A
badminton
B
basketball
C
football
D
archery
Question 26Single Answer
What is the national game of the United States of America ?
A
water polo
B
Rugby
C
Polo
D
baseball
Question 27Single Answer
When was the Constituent Assembly of India formed?
A
1946
B
1947
C
1948
D
1950
Question 28Single Answer
Who was the Chairman of the Drafting Committee of the Indian Constitution?
A
Dr. Rajendra Prasad
B
Dr. B.R. Ambedkar
C
Jawaharlal Nehru
D
Sardar Vallabhbhai Patel
Question 29Single Answer
The idea of the Constituent Assembly was first put forward by:
A
Mahatma Gandhi
B
M.N. Roy
C
Jawaharlal Nehru
D
Sardar Vallabhbhai Patel
Question 30Single Answer
The Cabinet Mission Plan for India was proposed in:
A
1942
B
1945
C
1946
D
1947
Question 31Single Answer
The Constitution of India was adopted on:
A
15th August 1947
B
26th January 1950
C
26th November 1949
D
30th January 1948
Question 32Single Answer
What is the lithosphere composed of ?
A
Water and gases
B
Rocks and minerals
C
Living organisms
D
Air and gases
Question 33Single Answer
The lithosphere includes :
A
Only the Earth's crust
B
The Earth's crust and upper mantle
C
Only the Earth's mantle
D
The Earth's crust, mantle, and core
Question 34Single Answer
Who is known as the "Missile Man of India"?
A
Dr. Homi J. Bhabha
B
Dr. Vikram Sarabhai
C
Dr. APJ Abdul Kalam
D
Dr. Satish Dhawan
Question 35Single Answer
Which organization is responsible for India's space exploration programs?
A
BARC
B
ISRO
C
DRDO
D
HAL
Question 36Single Answer
Which Indus Valley site is famous for its dockyard?
A
Harappa
B
Mohenjo-daro
C
Lothal
D
Kalibangan
Question 37Single Answer
The Great Bath, a remarkable structure of the Indus Valley Civilisation, was discovered at:
A
Harappa
B
Mohenjo-daro
C
Lothal
D
Dholavira
Question 38Single Answer
The script of the Indus Valley Civilisation is:
A
Brahmi
B
Kharosthi
C
Pictographic and Undeciphered
D
Sanskrit
Question 39Single Answer
Which metal was NOT known to the people of the Indus Valley Civilisation?
A
Copper
B
Bronze
C
Gold
D
Iron
Question 40Single Answer
The figure of a deity, often identified as 'Pashupati Mahadeva', is depicted on seals found at Indus Valley sites. Which animals are typically shown surrounding the deity?
A
Lion, Horse, Bull, Elephant
B
Elephant, Tiger, Rhinoceros, Buffalo
C
Cow, Deer, Goat, Tiger
D
Horse, Bear, Wolf, Rhinoceros
Question 41Single Answer
Which Indus Valley site in Gujarat is known for its unique water management system and a large inscription often referred to as a signboard?
A
Lothal
B
Surkotada
C
Rangpur
D
Dholavira
Question 42Single Answer
Evidence of ploughed fields has been found at which Indus Valley site?
A
Mohenjo-daro
B
Chanhudaro
C
Kalibangan
D
Banawali
Question 43Single Answer
The Indus Valley people primarily worshipped:
A
Forces of Nature
B
Trimurti (Brahma, Vishnu, Shiva)
C
Mother Goddess and Pashupati
D
Agni and Indra
Question 44Single Answer
What was the most common building material used in Harappan cities?
A
Stone
B
Wood
C
Baked Bricks
D
Mud Bricks
Question 45Single Answer
The famous bronze statue of the 'Dancing Girl' was excavated from:
A
Harappa
B
Lothal
C
Mohenjo-daro
D
Kalibangan
Question 46Single Answer
The earliest Veda, containing hymns primarily dedicated to nature gods, is:
A
Samaveda
B
Yajurveda
C
Atharvaveda
D
Rigveda
Question 47Single Answer
The term 'Sabha' and 'Samiti' in the Rigvedic period refer to:
A
Types of sacrifices
B
Two important rivers
C
Popular assemblies
D
Classes of priests
Question 48Single Answer
Which statement best describes the economy of the Early Vedic (Rigvedic) period?
A
Primarily agricultural with extensive trade networks
B
Primarily pastoral and nomadic, with subsidiary agriculture
C
Urban-based trade and crafts dominated
D
Based solely on hunting and gathering
Question 49Single Answer
The Upanishads are primarily texts dealing with:
A
Ritualistic procedures
B
Laws of social conduct
C
Philosophical and metaphysical speculation
D
Hymns and chants
Question 50Single Answer
The Later Vedic period saw the shift of the geographical focus of Aryan culture from the Sapta Sindhu region to the:
A
Ganga-Yamuna Doab
B
Deccan Plateau
C
Malwa Plateau
D
Southern Peninsula
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General Studies
Question 51Single Answer
Which God lost his prominence from the Rigvedic to the Later Vedic period?
A
Prajapati
B
Vishnu
C
Rudra (Shiva)
D
Indra
Question 52Single Answer
The term 'Gotra', which emerged prominently in the Later Vedic period, signifies:
A
A unit of currency
B
A territorial division
C
Lineage or clan descending from a common ancestor
D
A type of sacrifice
Question 53Single Answer
The 'Gayatri Mantra' is contained in which Veda?
A
Samaveda
B
Yajurveda
C
Atharvaveda
D
Rigveda
Question 54Single Answer
The concept of 'Ashramas' (stages of life - Brahmacharya, Grihastha, Vanaprastha, Sanyasa) fullyย developed during the:
A
Early Rigvedic Period
B
Later Vedic Period
C
Mauryan Period
D
Gupta Period
Question 55Single Answer
According to Jain tradition, who was the first Tirthankara?
A
Parshvanatha
B
Mahavira
C
Rishabhanatha (Adinatha)
D
Neminatha
Question 56Single Answer
The concept of 'Rule of Law' is a feature of which constitution?
A
American Constitution
B
British Constitution
C
French Constitution
D
Canadian Constitution
Question 57Single Answer
The idea of 'Fundamental Duties' was incorporated in the Indian Constitution from which country?
A
USA
B
UK
C
USSR (now Russia)
D
Ireland
Question 58Single Answer
Which part of the Indian Constitution deals with the 'Fundamental Rights'?
A
Part II
B
Part III
C
Part IV
D
Part IVA
Question 59Single Answer
The 'Directive Principles of State Policy' are mentioned in which part of the Indian Constitution?
A
Part II
B
Part III
C
Part IV
D
Part IVA
Question 60Single Answer
The 'Basic Structure' doctrine of the Indian Constitution was propounded in which case?
A
Golak Nath Case
B
Minerva Mills Case
C
Kesavananda Bharati Case
D
A.K. Gopalan Case
Question 61Single Answer
Which amendment to the Indian Constitution added the 'Fundamental Duties'?
A
42nd Amendment
B
44th Amendment
C
73rd Amendment
D
86th Amendment
Question 62Single Answer
The 'Concurrent List' in the Indian Constitution is derived from which country?
A
Canada
B
Australia
C
Ireland
D
USA
Question 63Single Answer
Which article of the Indian Constitution deals with the 'President's Rule'?
A
Article 352
B
Article 356
C
Article 360
D
Article 368 ย
Question 64Single Answer
The 'Emergency Provisions' in the Indian Constitution are taken from which country?
A
Germany (Weimar Constitution)
B
Canada
C
Australia
D
Ireland
Question 65Single Answer
Which article of the Indian Constitution deals with 'Amendment of the Constitution'?
A
Article 352
B
Article 356
C
Article 360
D
Article 368
Question 66Single Answer
What is the term for the total value of all final goods and services produced within a country's borders in a given period?
A
GNP
B
GDP
C
NNP
D
DPI
Question 67Single Answer
What is the primary function of a central bank?
A
Lending to individuals
B
Regulating the money supply
C
Selling stocks
D
Managing retail stores
Question 68Single Answer
What is fiscal policy?
A
Policy related to interest rates
B
Policy related to government spending and taxation
C
Policy related to foreign exchange
D
Policy related to stock markets
Question 69Single Answer
What is the term for a market structure with a single seller?
A
Oligopoly
B
Monopoly
C
Perfect competition
D
Monopolistic competition
Question 70Single Answer
What is the term for the percentage of the labor force that is unemployed?
A
Inflation rate
B
Unemployment rate
C
Interest rate
D
Exchange rate
Question 71Single Answer
What does CPI measure?
A
Corporate profit index
B
Consumer price index
C
Capital productivity index
D
Commercial performance index
Question 72Single Answer
What is the term for the total revenue minus total cost?
A
Income
B
Profit
C
Expenditure
D
Investment
Question 73Single Answer
What is the term for the study of how individuals and societies make decisions about scarce resources?
A
Sociology
B
Economics
C
Political science
D
Psychology
Question 74Single Answer
What is the term for goods used in the production of other goods?
A
Consumer goods
B
Capital goods
C
Luxury goods
D
Public goods
Question 75Single Answer
What is the term for the increase in the value of goods and services produced by an economy over time?
A
Inflation
B
Economic growth
C
Deflation
D
Recession
Question 76Single Answer
What is the largest object in our solar system?
A
Earth
B
Moon
C
Sun
D
Jupiter
Question 77Single Answer
Which motion of the Earth causes day and night?
A
Revolution
B
Rotation
C
Precession
D
Nutation
Question 78Single Answer
What is the Earth's path around the Sun called?
A
Axis
B
Orbit
C
Equator
D
Meridian
Question 79Single Answer
What is the standard time based on?
A
Local time
B
Greenwich Mean Time (GMT)
C
Solar time
D
Sidereal time
Question 80Single Answer
What causes the seasons on Earth?
A
Earth's rotation
B
Earth's revolution and axial tilt
C
Solar flares
D
Lunar phases
Question 81Single Answer
What is the Earth's innermost layer called?
A
Crust
B
Mantle
C
Core
D
Lithosphere
Question 82Single Answer
Which of the following is a major landform?
A
Valley
B
Mountain
C
Plateau
D
All of the above
Question 83Single Answer
What is the term for the average weather conditions in a region over a long period?
A
Weather
B
Climate
C
Meteorology
D
Hydrology
Question 84Single Answer
What are large bodies of air with uniform temperature and humidity called?
A
Fronts
B
Air masses
C
Cyclones
D
Anticyclones
Question 85Single Answer
What is the boundary between two air masses called?
A
Cyclone
B
Front
C
Anticyclone
D
Isotherm
Question 86Single Answer
What major defence-related development was highlighted on 1 May 2026 involving India and Italy?
A
Joint naval exercise in the Indian Ocean
B
Purchase of Rafale jets
C
Rajnath Singh-Italy Defence Pact
D
Signing of a nuclear agreement
Question 87Single Answer
Which satellite was launched by ISRO around early May 2026?
A
GSAT-31
B
Chandrayaan-4
C
INSAT-4CR
D
GSAT-32
Question 88Single Answer
What is Prerna 2.0, launched/introduced in the news on 1 May 2026?
A
A new defence missile system
B
Green hydrogen mission
C
AI Tutoring initiative
D
Digital payment platform
Question 89Single Answer
UAE announced its exit from OPEC, with the decision taking effect from:
A
1 May 2026
B
1 January 2026
C
1 July 2026
D
31 December 2026
Question 90Single Answer
A tragic road accident in Dhar, Madhya Pradesh on or around 1 May 2026 resulted in how many deaths?
A
At least 16 (including 6 children and 7 women)
B
8
C
25
D
12
Question 91Single Answer
A wall collapse at a hospital in which city killed seven people around early May 2026?
A
Bengaluru, Karnataka
B
Mumbai
C
Hyderabad
D
Chennai
Question 92Single Answer
Indian airlines (Air India, IndiGo, SpiceJet) informed the government about potential operational issues due to:
A
Pilot shortage
B
High fuel prices and Strait of Hormuz closure amid Iran war
C
New DGCA regulations
D
Airport congestion
Question 93Single Answer
RBI's April 2026 Monetary Policy kept the repo rate unchanged at:
A
6.5%
B
6.0%
C
4.75%
D
5.25%
Question 94Single Answer
Which initiative or mission was linked to Tatya Topeโs letter discovery?
A
Swachh Bharat
B
Namami Gange
C
Digital India
D
Gyan Bharatam Mission
Question 95Single Answer
Neeraj Chopra began his pre-season training for 2026 in which country?
A
Germany
B
South Africa (Potchefstroom)
C
USA
D
Australia
Question 96Single Answer
What major global sporting event is scheduled from 11 June to 19 July 2026?
A
Winter Olympics
B
FIFA World Cup 2026
C
Asian Games
D
Commonwealth Games
Question 97Single Answer
Vaishnath (Railway Minister) flagged off the first direct Vande Bharat Express between:
A
Delhi and Mumbai
B
Jammu and Srinagar
C
Chennai and Bengaluru
D
Kolkata and Guwahati
Question 98Single Answer
What new framework did the RBI announce plans for regarding NBFCs in April 2026?
A
Complete deregulation
B
Classification into upper, middle, and lower layers
C
Merger with banks
D
Ban on new NBFCs
Question 99Single Answer
From 1 April 2026, RBI shifted processing of overseas investment references to:
A
Only Mumbai office
B
SEBI
C
7 Regional Offices via PRAVAAH portal
D
Ministry of Finance
Question 100Single Answer
The Iran war and closure of the Strait of Hormuz led to:
A
Oil prices hitting four-year high
B
Record low oil prices
C
Increased Indian exports
D
Rupee appreciation
Mechanical
Question 101Single Answer
If a submerged body displaced from its equilibrium position, returns to its original position, it is called __________.
A
thermal equilibrium
B
neutral equilibrium
C
unstable equilibrium
D
stable equilibrium
Question 102Single Answer
In a flow measurement, a venturi meter is preferred over an orifice plate because _____.
A
energy of head loss is less
B
It is cheaper
C
pressure drop is more
D
space is limitedย ย
Question 103Single Answer
Pitot tube measures ______.
A
dynamic pressure of a moving stream
B
guage pressure
C
temperature of moving water
D
pressure difference between two fluids
Question 104Single Answer
Which of the following is not a property of an ideal fluid ?
A
flow is irrotational
B
it has no viscosity
C
it has viscosity
D
it is incompressible
Question 105Single Answer
Nozzle used in steam turbines convert ________.
A
enthalpy of steam into work
B
enthalpy of steam into kinetic energy
C
enthalpy of steam into pressure energy
D
pressure energy into work
Question 106Single Answer
Which of the following assumptions is the most relevant in air-standard cycle analysis ?
A
All the processes within the cycle are irreversible
B
Working fluid is a fixed mass
C
Specific heat of air changes during the cycle
D
Cycle is assumed to be an open cycle
Question 107Single Answer
The modern Francis turbine is a ___________flow turbine .
A
tangentialย
B
axial
C
radial
D
mixed
Question 108Single Answer
Variation of stress with strain rate for a Newtonian fluid is ______ .
A
hyperbolic
B
linear
C
elliptical
D
parabolic
Question 109Single Answer
Which of the following is NOT a part of refrigeration systems ?
A
Turbine
B
Evaporator
C
Compressor
D
Condenser
Question 110Single Answer
Which of the following is NOT an intensive property ?
A
Temperature
B
Total volume
C
Pressure
D
Density
Question 111Single Answer
Which of the following does NOT represent a unit of viscosity ?
A
Stoke
B
Poise
C
mยฒ/sec
D
N-m/sec
Question 112Single Answer
__________ in the fuel is oxidised during knocking .
A
Hydrocarbon
B
Phosphorous
C
Water
D
Coal
Question 113Single Answer
_________ is defined as the ability of a material to resist deformation under action of an external load .
A
Stiffness
B
Resilience
C
Brittleness
D
Toughness
Question 114Single Answer
Draught is produced in locomotive boilers by which of the following components ?
A
Locomotive
B
Steam jet
C
Centrifugal fan
D
Chimney
Question 115Single Answer
For a steady flow, the value of all fluid properties at any fixed point _________ .
A
do not change with location
B
change with time
C
change with location
D
do not change with time
Question 116Single Answer
For a floating body, if the metacentre is below the centre of gravity, then the body is said to be __________ equilibrium .
A
thermalย
B
stableย
C
unstable
D
neutral
Question 117Single Answer
________ is useful for measuring flow of a conducting fluid .
A
Orifice meter
B
Rotameter
C
Vane meter
D
Electro-magnetic flow meter
Question 118Single Answer
A two- stroke engine consists of ________ port (s)
A
Three
B
Four
C
One
D
Two
Question 119Single Answer
Air Cooling is mostly preferred for _________ .
A
heavy truck
B
buses
C
moto cycles
D
multi-utility vehicles
Question 120Single Answer
_______ valves are provided in reciprocating compressors .
A
Simply supported
B
Solenoid
C
Plate
D
Poppet
Question 121Single Answer
Benson boiler have ______ water drum (s)
A
One
B
Zero
C
Three
D
Two
Question 122Single Answer
_________ is used for pumping water into a boilers .
A
Economiser
B
Duplex pump
C
Feed pump
D
Rotor
Question 123Single Answer
The function of a carburetor in internal combustion engines is :
A
to control fuel alone
B
to cool exhaust gases
C
to maintain air-fuel ratio
D
to control air alone
Question 124Single Answer
The device which transfers energy from the ______ to _____ the is known as hydraulic turbine .
A
atmosphere; fluidย ย
B
ย rotor; fluid
C
fluid; rotor
D
fluid; atmosphere
Question 125Single Answer
The flash chamber in the single stage VCR cycle serves to ________ .
A
decrease the compression ratio
B
increase the refrigerating effect
C
increase the compression ratio
D
decrease the refrigerating effect
Question 126Single Answer
Define thermodynamics .
A
It is a science which deals with the relation between heat, work and properties of systems
B
It is a science which deals with work done
C
It deals with dynamics under thermal conditions
D
It is science which deals with the relation between work and properties
Question 127Single Answer
Which of the following statements is correct about a Benson boiler ?
A
Air is sent through the same direction
B
There is no recirculation of water
C
Steam is sent out in multiple directions
D
Flue gases pass only in one direction
Question 128Single Answer
Within a refrigeration system, the expansion valve is incorporated between the ________ .
A
Super-heater and sub-coolerย
B
compressor and condenser
C
evaporator and compressor
D
condenser and evaporator
Question 129Single Answer
The reversed ______ cycle employed for passenger aircraft systems .ย
A
Carnotย ย ย
B
Atkinson
C
Ericsson
D
Brayton
Question 130Single Answer
Fusible plug in a steam boiler is placed ______ .
A
below the water level indicator
B
at he crown of the furnace
C
at the fire grate of the boiler
D
near the manhole
Question 131Single Answer
Aqua ammonia solution used in a vapour absorption refrigeration system is a solution of ammonia in ________ .
A
CF3ย ย ย ย ย ย ย ย ย ย ย ย
B
ย LiBrย ย ย ย ย ย ย
C
H2O2ย ย
D
H2Oย ย
Question 132Single Answer
Coated electrodes are used in ______ .
A
gas tungsten arc weldingย
B
submerged arc welding
C
tungsten insert gas welding
D
shielded metal arc welding
Question 133Single Answer
Where is air cycle refrigeration commonly used ?
A
Domestic refrigerator
B
Cold storage
C
Aircraft conditioning
D
Car air conditioning
Question 134Single Answer
________, is not a water tube boiler .
A
Benson boiler
B
Babcock-Wilcox boiler
C
Stirling boiler
D
Scotch marine
Question 135Single Answer
Stoke is another unit of -
A
kinematic viscosityy
B
velocity gradient
C
Shear stress
D
dynamic viscosit
Question 136Single Answer
For a refrigerating machine, capacity is expressed as ______ .
A
the lowest temperature attainedย ย ย
B
inside volume of the cabinet
C
gross weight of the machineย
D
rate of heat extraction from the space being cooled
Question 137Single Answer
The value of quality or dryness fraction of a substance in saturated liquid-vapor mixture is ________ .
A
1ย ย ย ย ย ย ย ย ย
B
2ย
C
Zero
D
between Zero and 1
Question 138Single Answer
Uniform flow is the type of flow where in velocity at any given time ________- with respect to space .
A
Decreases
B
Does not change
C
Increases
D
Changes
Question 139Single Answer
______ falls under the category of a water tube boiler .
A
Locomotive boilerย ย ย
B
Lancashire boiler
C
Cornish boiler
D
LaMont boiler
Question 140Single Answer
Chaplets are used in ________ .
A
forging
B
castingย ย
C
welding
D
extrusion
Question 141Single Answer
Which of the following is NOT a unit of pressure ?
A
Paย ย
B
Bar
C
N/mยฒ
D
Joule
Question 142Single Answer
What was the first refrigerant used in continuous refrigeration system ?
A
Ammoniaย ย ย
B
Water
C
ย Air
D
Carbon dioxide
Question 143Single Answer
For a 2 m deep swimming pool, pressure difference between the top and the bottom of the pool is ________ kPa .
A
22
B
19.6
C
11
D
12
Question 144Single Answer
Pressure measurement is done by ____. by measuring heat loss from a heated wire .
A
ย A pirani gauge
B
a manometerย
C
a barometer
D
an orifice meter
Question 145Single Answer
In the Rankine cycle, the fluid which enters the boiler is :
A
water
B
steam
C
mercury
D
oxygen
Question 146Single Answer
Percentage elongating measured during tensile testing indicates _____ .
A
malleability
B
fatigue strength
C
creep
D
ductility
Question 147Single Answer
For a given centrifugal pump, discharge varies _______ with speed .
A
fifth power of
B
linearly
C
inversely
D
square root of
Question 148Single Answer
Foaming is a phenomenon that occurs in the boiler feed water due to _____ .
A
nitrogen peroxide
B
manganese
C
sodium chloride
D
oil
Question 149Single Answer
Compounding of a steam turbine is done to ______ .
A
balance the rotor
B
reduce the rotor speed
C
reduce the blade friction
D
connect the shaft
Question 150Single Answer
Any change in entropy could be achieved by changing______ .
A
velocity
B
heat
C
acceleration
D
mass
Question 151Single Answer
Smoke emitting from a lighted cigarette represents ________ .
A
point
B
pathline
C
streakline
D
streamline
Question 152Single Answer
The splash system is NOT used to lubricate _______ .
A
tappets
B
camshafts
C
gear teeth and roller bearings
D
piston rings
Question 153Single Answer
A dead weight tester is used widely for ______ .
A
producing high pressures
B
accurate measurement of loads
C
calibration of another equipment
D
testing magnitude of the given weight
Question 154Single Answer
_______ CANNOT be classified as inversion (s) of a single-slider crank mechanism .
A
Elliptical trammel
B
Whitworth quick-return mechanism
C
Oscillating cylinder engine
D
Crank and slotted-lever mechanism
Question 155Single Answer
Which of the following is NOT a part of Rankine cycle ?
A
Pumpย ย
B
Compressor
C
Boiler
D
Turbine
Question 156Single Answer
A power plant that uses a gas turbine followed by a steam turbine for necessary power generation is known as __________ cycle power plant .
A
combined
B
bottom
C
generation
D
topping
Question 157Single Answer
In the context of properties of steel, which of the following statement is highly relevant ?
A
Presence of carbon contents imparts strength to iron
B
Presence of carbon does not influence the heat-treatment process
C
Presence of manganese decreases strength.
D
Presence of sulphide improves corrosion resistance
Question 158Single Answer
Those pumps employed for mud related work have ______ type of impeller .
A
an open
B
a two-side shrouded
C
a double-suction
D
a one-side shrouded
Question 159Single Answer
If the oil viscosity increased, then the wear loss _________ .
A
increases
B
becomes zero
C
decreases
D
remains the same
Question 160Single Answer
Impact load is an example of :
A
uniform load
B
static load
C
dynamic load
D
fatigue load
Question 161Single Answer
Internal energy associated with kinetic energy of molecules is ______ .
A
latent energy
B
nuclear energy
C
sensible energy
D
chemical energy
Question 162Single Answer
A capillary tube is employed in a refrigeration cycle to _______ .
A
produce a cooling effect
B
control temperature of the refrigerated space
C
reduce pressure of the refrigerant
D
control flow of the refrigerant
Question 163Single Answer
The Babcock-Wilcox boiler is classified as a water tube boiler because :
A
it has a large reservoir of water at the bottom
B
water passes around the tubes having hot gases
C
water heater is mounted on the boiler itself
D
water passes through the tube and hot gases around
Question 164Single Answer
Otto cycle of a car engine consists of :
A
two isochore and two reversible adiabatic cycles
B
four adiabatic cycles
C
one isochore cycle only
D
one adiabatic cycle only
Question 165Single Answer
When hot air exhausting from the turbine is used to heat up the compressor exit flow, it is knows as _______ .
A
regeneration
B
re-evaporating
C
intercooling
D
intracooling
Question 166Single Answer
If the specific gravity of oil is 0.7, then its density in kg/mยณ will be _______ .
A
700
B
7
C
70
D
7000
Question 167Single Answer
viscous forces are NOT available in _______ .
A
laminar flow
B
irrational flow
C
rotational flow
D
transitional flow
Question 168Single Answer
Which of the following is the most widely used fuel in boilers ?
A
Pulverised coal
B
Wood
C
Oil
D
Anthracite coal
Question 169Single Answer
If the relationship between shear stress of a fluid is NOT linear to the velocity gradient, then the fluid is :
A
a compressible fluid
B
a Newtonian fluid
C
a non-Newtonian fluid
D
an ideal fluid
Question 170Single Answer
In a Pelton wheel, jet ratio values are ________ .
A
More than 6
B
between 2 and 5
C
less than 1
D
less than or equal to 2
Question 171Single Answer
What is kinematic viscosity ?
A
It is the rate of change of shear stress
B
It is the ratio of dynamic viscosity to relative density
C
It is the ratio of dynamic viscosity to mass density
D
It is the rate of change of shear strain
Question 172Single Answer
The efficiency of an ideal diesel engine does NO directly depend on ______ .
A
the cut-off ratio
B
the compression ratio
C
the fluid pressureย
D
the isentropic index
Question 173Single Answer
Which of the following equipment gives direct reading of fluid flow rates ?
A
Nutating disk flow meter
B
Hot wire anemometer
C
Rotameter
D
Orifice meter
Question 174Single Answer
The tendency of material to fracture without appreciable deformation is called ______ .
A
stiffness
B
plasticity
C
toughness
D
brittlensess
Question 175Single Answer
Lancashire boiler has ______ flue tube(s), whereas Cornish boiler has _____ flue tube (s) .
A
3 ; 2
B
2; 2
C
2; 1
D
1; 2
Question 176Single Answer
The maximum temperature in case of internal combustion engines is obtained at ______ .
A
end of the compression process
B
end of the expansion process
C
start of the compression process
D
start of the expansion process
Question 177Single Answer
The moisture content o steam at the turbine exit of a steam power plant operating on the Rankine cycle can be decreased by :
A
increasing boiler pressure
B
super cooling steam
C
decreasing boiler pressure
D
reheating steam
Question 178Single Answer
Which of the following is NOT a non-ferrous alloy ?
A
Stainless steel
B
Magnesium
C
Titanium
D
Aluminium
Question 179Single Answer
The flow is volute casing outside the rotating impeller of a centrifugal pump is :
A
forced vortex flow
B
radial flow
C
free vortex flow
D
axial flow
Question 180Single Answer
The compression ratio in ideal air standard cycles is the ratio of :
A
minimum pressure to maximum pressure
B
minimum volume to maximum volume
C
maximum pressure to minimum pressure
D
ย maximum volume to minimum volume
Question 181Single Answer
Two stroke engine consist of a combined process of _____ in a single stroke .
A
compression and expansion
B
suction and compression
C
suction and expansion
D
suction and exhaust
Question 182Single Answer
The density of fluid does NOT affect the working of ______ .
A
an electro-magnetic flow meter
B
a nozzle meter
C
a rotameter
D
an orifice meter
Question 183Single Answer
Which of the following processes is NOT part of an ideal Otto cycle ?
A
Isentropic expansion
B
Heat addition at constant volumeย
C
Isentropic compression
D
Heat addition at constant pressure
Question 184Single Answer
In which of the following types of compressors are the motor and compressor enclosed in the same housing ?
A
Open-type compressor
B
Hermetic compressor
C
Reciprocating compressor
D
Axial flow type compressor
Question 185Single Answer
An oil of specific gravity 0.7 is stored in a closed tank up to a height of 2m. What will be the gauge pressure at the bottom of the tank ?
A
0.14 MPa
B
1.4 MPa
C
0.014 MPa
D
14 MPa
Question 186Single Answer
If there is no change in pressure at any point of the system with time, then the system is said to be in :
A
chemical equilibrium
B
mechanical equilibrium
C
Phase equilibrium
D
thermal equilibrium
Question 187Single Answer
If Valve of dryness fraction is 0, it indicates that working fluid is at ______ .
A
Compressed liquid
B
Saturated liquid
C
saturated vapour
D
supreheated vapour
Question 188Single Answer
In the context of roto-dynamic machines, which of the following statements is correct ?
A
There will be a relative motion between the rotor vanes and the fluid
B
Linear momentum is the normal to the statorย ย
C
Linear momentum is the direction normal to the rotor
D
While flowing through the stator. linear momentum changes
Question 189Single Answer
When two elements of a pair are connected such that they can only turn about a fixed axis of another element, they are called _______ .
A
a turning pair
B
a screw pair
C
a spherical pair
D
a sliding pair
Question 190Single Answer
In high-speed aircrafts flying at high altitudes, why is cooling of the cabin required even temperature outside is very low ?
A
Since outside pressure is very high
B
Due to absence of solar radiation
C
To improve fuel efficiency
D
Due to large internal heat generation
Question 191Single Answer
Fusible plug is generally made up of an alloy (gunmetal) which consists of copper, tin and _______ .
A
cast iron
B
zinc
C
aluminium
D
manganese
Question 192Single Answer
In the context of laminar flow, which of the following statement sis the most appropriate ?
A
Laminar flow is observed in high viscous fluids at low velocity
B
There will be an exchange of momentum from fluid particles of one layer of another layer
C
Flow is always through small tanks
D
Particles move in turbulent order
Question 193Single Answer
Which of the following statements is more relevant in the context ?
A
If center of gravity is below the centre of buoyancy, the body is unstable
B
Metacentric height is positive in case of unstable equilibrium
C
The centre of buoyancy in a submerged boy remains
D
When the body is fully submerged, shape of he displaced fluid alters when the body is tilted
Question 194Single Answer
Determinate the COP (coefficient of performance) of a heat pump if the rate of heat rejected is 360 kJ/min and power supplied is 2 kW .
A
4ย ย ย ย ย ย
B
2ย
C
3
D
1
Question 195Single Answer
Define free-body diagram
A
A figure that represent external forces acting on a body
B
A diagram that represents internal forces acting on a body
C
A free-hand sketch representing a body
D
A diagram that only represents moments acting on a body
Question 196Single Answer
A ball and socket joint is an example of a ________pair .
A
turning
B
screw
C
rollingย ย ย ย
D
spherical
Question 197Single Answer
From among the given options, Poisson's ration is the highest for :
A
iron
B
wood
C
copperย ย
D
rubber
Question 198Single Answer
What is ductility in steel ?
A
Ratio of ultimate stress to yield stress
B
Stress at yield stress
C
Amount of strain a material can withstand before fracture
D
Ratio of change in length to original length
Question 199Single Answer
If the gauge pressure of air in a cylinder is 250 kPa, then it's absolute pressure will be _______ .
A
50 kPaย ย ย ย
B
150 kPa
C
350 kPaย ย
D
450 kPa
Question 200Single Answer
Flow velocity at the throat of a converging-diverging nozzle is ______, when designed for maximum discharge .
A
Supersonic
B
Sonic
C
Sub-sonic
D
Hypersonic
Question 201Single Answer
What happens when a fluid is at rest ?
A
There is no shear component
B
Internal deformation is considerable
C
Fluid element will not be subjected to normal and shear component
D
Frictional force is present
Question 202Single Answer
What is the unit of surface tension ?
A
kg/m
B
N/m
C
N-m
D
N
Question 203Single Answer
Which of the following does NOT result in poor performance of boilers ?
A
Surface fouling
B
Poor combustion
C
Boiler mounting
D
Poor water quality
Question 204Single Answer
In the context of fluid mechanics, which of the following statements is INCORRECT ?
A
Fluid continues in motion under the application of shear stress
B
Fluid does not deform continuously under shear stress
C
Fluid cannot sustain any shear stress when at rest
D
Fluid deforms under very small shear stress
Question 205Single Answer
A centrifugal pump :
A
flow is radially outwards in this pump
B
fluid gain is through constant head
C
flow is tangential in this pump
D
works on the same principle as that of a Francis turbine
Question 206Single Answer
A fusible plug must be used primarily for safety purposes in which of the following types of boilers ?
A
Oil-fired boiler
B
High โ pressure boiler
C
Fire-tube boiler
D
Marine type boiler
Question 207Single Answer
The Rankine cycle is an ideal cycle for vapour power plants because :
A
it does not allow isentropic expansionย
B
steam is not condensed in the condenser
C
it includes reversible processes
D
water enters the pump at unsaturated state
Question 208Single Answer
A continuity equation for two dimensional compressible flow is given by
A
B
C
D
Question 209Single Answer
A single stage impulse turbine is also known as :
A
Curtis stage turbine
B
reaction turbine
C
De Laval turbine
D
Rateau turbine
Question 210Single Answer
Which of the following statements is more relevant ?
A
In kinematics of fluid flow, pressure is a vector field
B
In the Largrangian approach, a fluid particle of fixed mass is considered
C
Fluid kinematics deals with the action of the forces in producing or changing motion of fluid
D
In the Eluerian method, control volume approach is not used
Question 211Single Answer
The refrigerant used in the VCR based refrigerant cycle rejects heat in .............
A
the expansion value
B
the evaporator
C
the condenser
D
the compressor
Question 212Single Answer
Select the most appropriate definition of a turbine from the following statement :
A
Turbine is a fluid machine
B
It is device in which kinetic energy held by a fluid is converted to mechanical energy of a rotating member
C
It is a device where potential energy is transferred to a fluid
D
It is a device where mechanical energy from moving parts is transferred to a fluid
Question 213Single Answer
In the context of aircraft refrigeration cycle, what is temperature of air at the exit of cooling turbine in the absence of moisture condensation ?
A
Saturated temperature
B
Dry air rated temperature (DART)
C
Super-saturated temperature
D
Dry air temperature (DAT)ย
Question 214Single Answer
Fans and blowers of turbo mechines :
A
a higher static pressure will prevail
B
spiral casing decreases the static pressure
C
deliver air at a higher desired velocity
D
deliver air at a lower mass flow rate
Question 215Single Answer
Which of the following characteristics of a centrifugal pump is vital ?
A
Slip will decrease with the increase in flow rater
B
Fluid is considered to have friction while flowing inside the pump
C
Fluid moves normal to the blade
D
There will be no whirl component of velocity at the entry to impeller
Question 216Single Answer
For a single cylinder four-stroke oil engine, indicated power is 15 kW, calorific value of fuel is 40000 kJ/kg and fuel consumed is 0.001 kg/s. What will be the indicated thermal efficiency ?
A
40%
B
37.5%
C
62.5%
D
75%
Question 217Single Answer
In air standard cycle analysis of IC engines, which of the following statements is correct ?
A
Specific heats (Cp, Cv) of air vary with temperature
B
There will be a sudden change in chemical equilibrium of the working fluid
C
There are not intake or exhaust processes
D
Compression and expansion processes are considered as irreversible
Question 218Single Answer
What is a dilatants ?
A
It is a fluid with suspended colour pigments
B
It is a shear thickening fluid
C
It is a fluid that sustains shear stress without any deformation
D
It is a shear thinning fluid
Question 219Single Answer
Boilers in the Rankine cycle are used :
A
to allow expansion of steam
B
to store working fluid
C
for steam generation
D
to maintain heat in the process
Question 220Single Answer
Normal volume generated by the working piston when travelling from one dead centre to the next is called ...........
A
clearance volume
B
swept volume
C
total volume
D
stroke volume
Question 221Single Answer
Which of the following is an inferential type of flow meter ?
A
Purge flow regulator
B
Rotameter
C
Laser doppler
D
magnetic flowmeter
Question 222Single Answer
Which of the following statements is correct with reference to perpentual motion machines of the first kind ?
A
it violatates the second law of thermodynamics
B
It is a reversible process
C
It produces heat without receiving work input
D
It produces work without receiving heat
Question 223Single Answer
With respect to head loss of flowing fluid, select the most appropriate statement :
A
Energy loss is not caused by change in velocity
B
Increase in velocity in a flow induces large scale turbulence
C
Energy los is not due to formation of eddies
D
Portion of energy loss will not be dissipated as heat
Question 224Single Answer
According to IBR regulations, boilers exceeding ......... need regular inspection and certification :
A
capacity of more than 15 litres
B
capacity of more than 5 gallons
C
capacity lesser than 5 gallons
D
capacity of more than 50 gallons
Question 225Single Answer
While loading ........... material undergoes fracture after large amount of deformation :
A
isotropic
B
plastic
C
brittle
D
ductile
Question 226Single Answer
Which of the following statement is relevant ?
A
Fluid deforms continuously under the action of shear stress of even veloy low magnitude
B
Fluid deforms under constant shear stress
C
Fluid can sustain shear stress when at rest
D
fluid does not deform continuously under the action of shear stress
Question 227Single Answer
The specific gravity of water at standard atmospheric conditions is :
A
greater than 1
B
less thanย Zero
C
1
D
Zero
Question 228Single Answer
Which of the following pair is NOT an example of a lower pair ?
A
Prismatic pair
B
Helical and cylindrical pair
C
revolute pair
D
Rollin ball on a flat surface
Question 229Single Answer
A thermoelectric refrigeration system requires :
A
low voltage DC input
B
high voltage Dc input
C
high voltage AC inputย
D
low voltage AC input
Question 230Single Answer
For a carburising flame, the flow of ............... is kept higher :
A
argon
B
nitrogenย ย ย ย ย
C
oxygen
D
acetylene
Question 231Single Answer
At sea level, under normal conditions, what is the atmospheric pressure ?
A
101.32 kPa
B
100.043 kPa
C
100.1 kPa
D
104.13 kPa
Question 232Single Answer
The fourth stage of the compression ignition process is :
A
burning on the expansion stroke
B
ignition delay periodtion
C
period of controlled combustion
D
period of rapid of uncontrolled combus
Question 233Single Answer
Which of the following is the best example of a thixotropic fluid ?
A
Tooth paste
B
Minerals in suspension
C
Fly ash
D
Printing ink
Question 234Single Answer
One ton of refrigeration is equal to ............... kW .
A
5ย ย ย
B
2.5
C
3.5ย
D
1
Question 235Single Answer
lithium bromide is used as an absorbent in .........
A
vapour compression refrigeration
B
vapour absorption refrigeration
C
steam jet refrigeration
D
Electrolux refrigerators
Question 236Single Answer
A member of length 200 mm and diameter 25 mm is subjected to a tensile load of 20 kN. The final length of the member is found to be 220 mm. The percentage increase in the length of the member is :
A
2 %
B
1 %
C
5 %
D
10 %
Question 237Single Answer
An appurtenance whose length generally does NOT exceed three times of its diameter is called ........... .
A
a non-return valve
B
a diffuser
C
an orifice
D
a mouthpiece
Question 238Single Answer
Which refrigeration system is driven by low grade energy ?
A
Gas cycle refrigeration
B
Steam jet refrigeration
C
Vortex tube systems
D
Thermo-electric refrigeration
Question 239Single Answer
What is radiant heating in the context of boilers ?
A
Heating process carried out using radiation effect
B
Heating done on radial tubes
C
Saturated steam is re-circulated and superheated
D
Heating done on external walls only by reflecting radiant energy
Question 240Single Answer
When water is about to vapurise it is called ?
A
super-heated vapour
B
saturated vapour
C
sub-cooled liquid
D
sub-cooled liquid
Question 241Single Answer
Which is the most practical fluid for the Rankine cycle ?
A
Fuel
B
Air
C
Air-fuel mixture
D
Water
Question 242Single Answer
Heat and work both are :
A
point and path function
B
path functions
C
point functions
D
state functions
Question 243Single Answer
why do engines need to be cooled ?
A
To regulate mass transfer
B
To reduce ignition temperature
C
To avoid pre-ignition and knocking
D
To improve compression volume
Question 244Single Answer
............. is the ability of steel to resist stresses that are reversal in nature :
A
Impact strength
B
Fatigue strength
C
Toughnessย ย
D
Hardness
Question 245Single Answer
Which of the following is NOT a water-tube boiler ?
A
Stirling boiler
B
Cornish boiler
C
Loeffler boiler
D
LaMont boiler
Question 246Single Answer
Inter cooling in multistage compression reduces ...........
A
the work input to compressor
B
the volume of free air delivered
C
the pressure of air at delivery
D
the index of compression
Question 247Single Answer
With respect to reaction turbines, which of teh following statements is relevant ?
A
Guide
B
Water does not flow through a scroll casing
C
Governing of reaction turbines is done by altering position of the guide vanes
D
Flow rate cannot be controlled b changing the gate openings to the runner
Question 248Single Answer
Which of the following statements is INCORRECT with respect to water tube boilers ?
A
They are suitable for high steam pressure
B
They are suitable for large gas flows
C
They cannot handle high steam pressure
D
They are smaller and lesser in weight
Question 249Single Answer
Identify the complete and correct statement of the first law of thermodynamics :ย ย
A
During a process, extracting work without supplying heat, while sacrificing the energy of the system
B
Difference between the heat and work interactions during a pokes, which is property of the system
C
When a closed system executes a complete cycle, the sum of heat interactions is equal to the sum of work interactions
D
When a system undergoes a cycle, the integral of heat is equal to the integral of work
Question 250Single Answer
Which of the following is NOT a maintenance method of a boiler ?
A
Dry lay-up
B
Wet lay-up
C
Short-term lay-up
D
Chemical lay-up
Question 251Single Answer
Which of the following helps to increase efficiency of the Rankine cycle ?
A
Increasing average temperature at which heat is transferred to the working fluid
B
Increasing average temperature at which heat is transferred to the working fluid
C
Increasing the condenser pressure
D
Operating at constant temperature
Question 252Single Answer
The air fuel ratios used in a compression ignition engine lie in the range of :
A
6 to 14
B
18 to 25
C
40 to 48
D
28 to 36
Question 253Single Answer
What is the function of a fly wheel in IC engines ?
A
To absorb energy during suction stroke
B
To circulate air in the engine for cooling
C
To increase the speed
D
To maintain constant speed
Question 254Single Answer
Which of following is NOT a phase in steel ?
A
Pearlite
B
ย Austenite
C
limonite
D
Martensite
Question 255Single Answer
In a compressor, work is done by :
A
the fluid on the rotor
B
the rotor on the fluid element
C
the rotating part called stator
D
a static component known as impeller
Question 256Single Answer
Which of the following is the working fluid in an air-cycle refrigeration system ?
A
Air at high mach number
B
Saturated air
C
Compressed air
D
ย Gasย ย ย
Question 257Single Answer
If compression is achieved by trapping a refrigerant vapour in an enclosed space and then reducing its volume, then it is called :ย ย
A
roto-dynamic type compressor
B
open type compressor
C
radial-flow type compressor
D
positive-displacement type compressor
Question 258Single Answer
The benchmark pressure above which a boiler is considered to be a high-pressure boiler is :
A
60 bar
B
50 bar
C
80 bar
D
70 bar
Question 259Single Answer
What is a gauge pressure ?
A
It is pressure measured relative to a perfect vacuum
B
It is an alternate name of datum pressure
C
It is pressure measured relative to local atmospheric pressure
D
It is the same as local atmospheric pressure
Question 260Single Answer
The major function of a steam nozzle is to:
A
produce high viscosity steam
B
produce high velocity jet of stem
C
produce low velocity jet of steam
D
produce low viscosity steam
Question 261Single Answer
The COP (coefficient of performance) of a heat pump is always ........... the COP of a refrigerator :
A
greater than
B
less than
C
equal to
D
less than or equal to
Question 262Single Answer
In isentropic compression, similar to aircraft refrigeration cycle, what is ram efficiency ?
A
It is proportional to mass flow rateย
B
Ratio of input to output ram pressure
C
Ratio of aircraft velocity to sonic velocity
D
Ratio of actual pressure rise to isentropic pressure
Question 263Single Answer
Under what condition of fluid flow does shear stress NOT exists ?
A
Fluid in low velocity motion
B
Fluid in high velocity motion
C
Negligible viscosity
D
Relative motion exists between fluid layers
Question 264Single Answer
Aircraft engines use ............. for cooling engines :
A
a force cooling system
B
a water โ cooled system
C
a thermo โ syphon cooling system
D
an air-cooled system
Question 265Single Answer
What is the flow called if the velocity at a given instant is the same in both magnitude and direction throughout the flow domain ?
A
Turbulent flow
B
Laminar flow
C
Steady flow
D
Uniform flow
Question 266Single Answer
Define strain energy :
A
It refers to external work done on a bar
B
It refers to change in length of a bar
C
It is the potential energy stored by an elastic body when deformed
D
It is the energy released by a bar during loading process
Question 267Single Answer
In actual compressor, there is a clearance between the cylinder head and piston to take care of thermal expansion. Identify the correct expression from the given options, where C is the clearance (in mm) and L is the stoke length (in mm).
A
C = (0.005 L + 0.05)
B
C = (0.005 + 0.5L)
C
C = (0.005 L + 0.5)
D
C = (0.05 L + 0.5)ย ย
Question 268Single Answer
In the context of the Reynolds transport therorem, which of the following statement is the most appropriate ?
A
It uses fixed control volume
B
It links system and control volume approaches
C
it does not use control volume approaches
D
It uses deforming control volume
Question 269Single Answer
what is a diffuser ?
A
It is a duct which decreases the velocity and increases pressure
B
It is a type of nozzle
C
It is a type of valve that decreases pressure
D
It is voltage regulator
Question 270Single Answer
According to Kelvin-Panck's statement of the second law of thermodynamics. Which of the following statements is correct ?
A
Heat from a source should be rejected to a high temperature sink
B
It restricts the mechanical efficiency of the heat engine to be lesser than unity
C
Thermal efficiency of the heat engine will unity
D
It restricts the thermal efficiency of the heat engine to be lesser than unity
Question 271Single Answer
.......... states that "pressure of a gas mixture is equal to the sum of the pressures each gas would exert if it existsted alone at the mixture temperature and volume" :
A
Amagat's law of additive volumes
B
Hooke's law
C
Dalton's law of additive pressures
D
Ideal gas law
Question 272Single Answer
Define pure substance
A
A single substance without any mixture
B
Substance which is available in the purest form in nature
C
Substance with non-uniform composition
D
Substance with fixed chemical composition throughout
Question 273Single Answer
Which of the following statements is INCORRECT in the context of static fluid pressure ?
A
At any particular depth, it changes with direction
B
It exerts force normal to the walls of the container
C
It is independent of shape or area of the container
D
It is directly proportional to depth of fluid
Question 274Single Answer
What is the unit of absolute viscosity ?
A
Centipoise
B
Saybolt universal unit
C
Viscosity index
D
Centistoke
Question 275Single Answer
Which of the following statements is INCORRECT with reference to the first law of thermodynamics ?
A
Work done by a system on its surroundings is a positive quantity
B
Energy transfer to a system from its surrounding is a positive quantity
C
Heat interaction is a path functionย ย ย
D
Energy transfer is a point function
Question 276Single Answer
In a flow-measuring device, what is velocity head ?
A
Free rise of liquid column in an open-ended tube
B
Vertical distance through which a column of the flowing liquid what would rise in an open ended tube
C
Free fall of liquid column to attain a given velocity freely
D
Difference in elevation in the flow direction
Question 277Single Answer
What is a degree โ of โ freedom in the context of kinematics ?
A
Minimum dependent coordinates to describe the configuration
B
Maximum independent coordinate to describe the configuration
C
Maximum dependent variable specified to described the configuration
D
Minimum independent variables specified to fix the configuration
Question 278Single Answer
Which of the following statements is more relevant in the context of IC engines ?
A
Compression ratio of the fuel-air mixture is in the range of 6 to 10 in Spark Ignition (SI) engines
B
Compression ratio for air is in the range of 16 to 20 for SI engines
C
Walls of the engine cylinder of SI engines need to be thicker than CI engines
D
Compression Ignition (CI) engines have lesser weight than SI engines
Question 279Single Answer
In Lancashire boilers, the feed water tube is :
A
open channel type
B
perforated
C
thin conduit
D
solid
Question 280Single Answer
Which of the following is the characteristic of an isochoric process ?
A
Process during which specific volume remains constant
B
Process applied to impure substances
C
Process during which no heat is transferred
D
Process during which no mass is transferred
Question 281Single Answer
The Lagrangian description of fluid field is more computational because :
A
It is required to track movement of a large number of fluid particles with time
B
variation of velocity is expressed in Cartesian coordinates
C
Velocity field is a continuous function distribution with position and time
D
Velocity of the fluid particle is the same as the local velocity
Question 282Single Answer
For a Kaplan turbine, the value of speed ratio is ...........
A
2
B
0.5
C
0.1ย ย
D
0.9
Question 283Single Answer
What is sonic speed ?
A
It is the speed at which disturbance propagates at higher velocity
B
It is the speed at which disturbance propagates through an inelastic medium
C
It is the speed at which disturbance propagates through a medium
D
It is the speed of air
Question 284Single Answer
with respect to the first law of thermodynamics, which of the following statements is the most relevant ?
A
There is a natural tendency for any system to degenerate into a disordered state
B
Energy can be created or destroyed depending on the source of input
C
A process that involves transfer of heat energy is irreversible
D
Energy is always conserved
Question 285Single Answer
How is a high โ pressure boiler classified ?
A
When pressure > 50 bar
B
when pressure > 80 bar
C
When velocity of water is very low
D
When it operates, high amount of steam is required for the operation of the cycle
Question 286Single Answer
Another name for the Bell-Coleman cycle is :
A
reversed Carnot cycle
B
ideal reverse Brayton cycle
C
Carnot cycle
D
Rankine cycle
Question 287Single Answer
Which of the following is NOT a projectile motion ?
A
A stone thrown in any direction
B
A stone thrown horizontally from a building
C
A car moving in a straight line
D
A bullet fired from a gun
Question 288Single Answer
For a static fluid, the increase of pressure at any point inside the fluid, in a vertically downward direction, must be equal to the product of the .............. of the fluid and depth from the free surface
A
density
B
viscosity
C
specific gravity
D
specific weight
Question 289Single Answer
Which of the following is NOT considered as external loads ?
A
Those arising from environment
B
Those arising from cohesion of material
C
Those arising from fluid pressure
D
Those arising from service conditions
Question 290Single Answer
Identify the method by which steel is NOT classified :
A
Based on chemical composition
B
Based on notch toughness
C
Manufacturing method
D
Based on heat treatment
Question 291Single Answer
Identify the requirement of a good boiler from the following options :
A
It should use maximum refractory material
B
It should be able to produce steam at minimum pressure
C
It should have more flexible joints
D
It should be light in weight and compact
Question 292Single Answer
Define a machine in terms of its basic objective :
A
A device to transfer load to source
B
A device to transfer and transform motion and force from source to load
C
A device to transform force
D
A device used to transfer force
Question 293Single Answer
In a triple fluid vapour absorption refrigeration system, hydrogen gas is sued to :
A
provide vapour seal
B
reduce partial pressure of refrigerant in evaporator
C
improve system performance
D
circulate the refrigerant
Question 294Single Answer
An ideal constant pressure gas turbine works on the ............. cycle .
A
Atkinson
B
Lenoir
C
Stirling
D
Brayton
Question 295Single Answer
With respect to the term kinematic viscosity, which of the following statement is more relevant ?
A
Numerator represents property of the fluid to maintain its momentum
B
Denominator represents propagation of disturbance
C
Denominator represents physical property of the fluid to maintain its momentum
D
It is an indicator of absolute tendency of the fluidย ย ย ย ย ย ย ย
Question 296Single Answer
In the context of moving control volume, which of the following statements is more relevant ?
A
Absolute velocity of fluid caries fluid across the control volume
B
Control volume is considered as a fixed volume in space
C
Relative velocity of fluid carries across the control surface of moving control volume
D
Difference between absolute and relative velocities of fluid is the velocity across moving control volume
Question 297Single Answer
............. is also called spheroidal graphite cast iron :
A
Malleable cast iron
B
Ductile cast iron
C
White cast iron
D
Gray cast iron
Question 298Single Answer
Under what condition is an inclined manometer used ?
A
in small pressure changes
B
When surface of measurement is inclined
C
In high pressure range
D
When u-tube manometer is not available
Question 299Single Answer
Discharge over cipolletti weir of length 200 cm for a head over weir of 100 cm in mยณ/s is: