Question for UPPSC Polytechnic Lecturer (Mechanical) 2026 - Quiz / Questions / MCQ

Objective Questions

Latest UPPSC Polytechnic Lecturer Mechanical Exam Question (Objective Questions), MCQ in English

Subjects : General Studies, Mechanical

Question Bank UPPSC Polytechnic Lecturer (Mechanical) Paper-2 Exam - English

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General Studies

Question 1Single Answer

Yojna a weekly journal

A
Ministry of Finance
B
Ministry of Information and Broadcastin
C
Ministry of Rural Development
D
Planning Commission

Question 2Single Answer

Kurukshetra a journal on rural development is published by

A
Ministry of Finance
B
Ministry of Information and Broadcastin
C
Ministry of Rural Development
D
Planning Commission

Question 3Single 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 4Single Answer

In India rural incomes are generally lower than the urban incomes, which of the following reasons account for this
1. a large number of farmers are illiterate and know little about scientific agriculture
2. prices of primary products are lower than those of manufactured products
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 5Single 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 6Single Answer

When Uttar Pradesh got it officially as statehood ?

A
24 January, 1950
B
26 January, 1952
C
1 January, 1956
D
18 February, 1957

Question 7Single Answer

How many districts are there in Uttar Pradesh

A
60
B
57
C
75
D
87

Question 8Single Answer

What are the official languages of Uttar Pradesh ?

A
Hindi & Urdu
B
Only Hindi
C
Only Urdu
D
Kumaoni

Question 9Single Answer

How many members of Lok Sabha from Uttar Pradesh ?

A
56
B
78
C
80
D
51

Question 10Single Answer

How many members of Rajya Sabha from Uttar Pradesh ?

A
45
B
51
C
31
D
77

Question 11Single Answer

What is the state flower of Uttar Pradesh ?

A
Lily
B
Rose
C
Palash
D
Sunflower

Question 12Single Answer

What is state sport of Uttar Pradesh ?

A
Field Hockey
B
Cricket
C
Football
D
Swimming

Question 13Single Answer

"Who said, 'India was a parrot unto itself'?

A
Malik Muhammad Joyce
B
Raskhan
C
Rich Khusrow
D
Rich Hasan

Question 14Single Answer

When was the Constituent Assembly of India formed?

A
1946
B
1947
C
1948
D
1950

Question 15Single 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 16Single Answer

Who is known as the "Father of the Indian Renaissance" ?

A
Raja Ram Mohan Roy
B
Swami Vivekananda
C
Rabindranath Tagore
D
Mahatma Gandhi

Question 17Single Answer

Which classical dance form is associated with Tamil Nadu ?

A
Kathak
B
Kuchipudi
C
Bharatanatyam
D
Odissi

Question 18Single 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 19Single Answer

Which satellite was launched by ISRO around early May 2026?

A
GSAT-31
B
Chandrayaan-4
C
INSAT-4CR
D
GSAT-32

Question 20Single 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 21Single 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 22Single 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 23Single 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 24Single 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 25Single 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%

Mechanical

Question 26Single Answer

What is the state of a substance at the critical point on a phase diagram?

A
Solid
B
Liquid
C
Gas
D
Indistinguishable liquid-vapor phase

Question 27Single Answer

What does the triple point on a phase diagram represent?

A
Only solid exists
B
Solid, liquid, and vapor coexist
C
Only liquid exists
D
Only vapor exists

Question 28Single Answer

Which property is constant during a phase change at constant pressure?

A
Temperature
B
Volume
C
Entropy
D
Internal energy

Question 29Single Answer

What is the quality of a saturated liquid-vapor mixture defined as?

A
Ratio of liquid mass to total mass
B
Ratio of vapor mass to total mass
C
Ratio of liquid volume to total volume
D
Ratio of vapor volume to total volume

Question 30Single Answer

What is the specific volume of a substance in the saturated liquid state?

A
vf
B
vg
C
vfg
D
vavg

Question 31Single Answer

Which chart is used to represent the properties of a superheated vapor?

A
T-s diagram
B
P-v diagram
C
Mollier diagram
D
Psychrometric chart

Question 32Single Answer

What happens to the pressure of a substance at the triple point of water?

A
It is zero
B
It is kPa
C
Resolver
D
It is infinite

Question 33Single Answer

What is the slope of the sublimation curve on a P-T diagram?

A
Zero
B
Negative
C
Positive
D
Infinite

Question 34Single Answer

Which property is used to determine the state of a substance in a compressed liquid region?

A
Entropy
B
Specific volume
C
Quality
D
Enthalpy

Question 35Single Answer

Which diagram shows constant pressure lines as horizontal?

A
P-v diagram
B
T-s diagram
C
h-s diagram
D
P-T diagram

Question 36Single Answer

What is the specific enthalpy of a saturated liquid-vapor mixture given by?

A
hf + x(hfg)
B
hg + x(hfg)
C
hf + hfg
D
hg - hfg

Question 37Single Answer

What does the saturation dome represent on a T-s diagram?

A
Superheated region
B
Compressed liquid region
C
Two-phase region
D
Critical point

Question 38Single Answer

What is the critical temperature of water?

A
Hall effect sensor
B
Piezoelectric accelerometer
C
Optical encoder
D
Resolver

Question 39Single Answer

What is the critical pressure of water?

A
kPa
B
Resolver
C
MPa
D
Resolver

Question 40Single Answer

Which property is tabulated in steam tables for superheated vapor?

A
Quality
B
Specific volume
C
Latent heat
D
Phase fraction

Question 41Single Answer

What is the specific entropy of a saturated liquid denoted as?

A
sf
B
sg
C
sfg
D
savg

Question 42Single Answer

What is the value of hfg in the superheated vapor region?

A
Zero
B
Positive
C
Negative
D
Undefined

Question 43Single Answer

Which process occurs along the saturation line on a P-v diagram?

A
Isothermal
B
Isobaric
C
Isochoric
D
Adiabatic

Question 44Single Answer

What is the specific volume of a saturated vapor denoted as?

A
vf
B
vfg
C
vg
D
vavg

Question 45Single Answer

What is the slope of the vaporization curve on a P-T diagram?

A
Zero
B
Positive
C
Negative
D
Infinite

Question 46Single Answer

What is the specific internal energy of a saturated liquid-vapor mixture?

A
uf + x(ufg)
B
Resolver
C
uf + ufg
D
ug - ufg

Question 47Single Answer

Which region lies to the left of the saturated liquid line on a T-s diagram?

A
Superheated vapor
B
Compressed liquid
C
Two-phase mixture
D
Critical point

Question 48Single Answer

What is the value of entropy at the critical point?

A
Zero
B
Maximum
C
Minimum
D
Undefined

Question 49Single Answer

What is the latent heat of vaporization at the critical point?

A
Zero
B
Maximum
C
Minimum
D
Constant

Question 50Single Answer

Which diagram is used to analyze the Rankine cycle?

A
P-v diagram
B
T-s diagram
C
h-v diagram
D
P-T diagram

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Mechanical

Question 51Single Answer

What is the specific enthalpy of a superheated vapor determined by?

A
Pressure and temperature
B
Volume and temperature
C
Quality and pressure
D
Entropy and volume

Question 52Single Answer

What is the phase of water at atm and °C?

A
Compressed liquid
B
Saturated liquid-vapor mixture
C
Superheated vapor
D
Solid

Question 53Single Answer

What does the Zeroth Law of Thermodynamics establish?

A
Energy conservation
B
Entropy increase
C
Temperature equilibrium
D
Work transfer

Question 54Single Answer

What is the basis for defining temperature scales according to the Zeroth Law?

A
Heat transfer
B
Thermal equilibrium
C
Work done
D
Entropy change

Question 55Single Answer

Which system follows the Zeroth Law when two bodies reach the same temperature?

A
Isolated system
B
Closed system
C
Open system
D
All systems in contact

Question 56Single Answer

Which process obeys the First Law where?

A
Isobaric
B
Isothermal
C
Adiabatic
D
Isochoric

Question 57Single Answer

What does the Second Law of Thermodynamics introduce?

A
Energy conservation
B
Entropy
C
Temperature
D
Work

Question 58Single Answer

Which statement is true according to the Kelvin-Planck statement?

A
Heat can flow from cold to hot
B
No engine can be % efficient
C
Work can be fully converted to heat
D
Entropy remains constant

Question 59Single Answer

What does the Clausius statement of the Second Law state?

A
Heat cannot flow from cold to hot without work
B
Work cannot be converted to heat
C
Entropy is conserved
D
Energy is conserved

Question 60Single Answer

What is the entropy change for a reversible adiabatic process?

A
Zero
B
Positive
C
Negative
D
Infinite

Question 61Single Answer

What is the entropy change of the universe for an irreversible process?

A
Zero
B
Positive
C
Negative
D
Undefined

Question 62Single Answer

Which process is characterized by constant entropy?

A
Isothermal
B
Isobaric
C
Isentropic
D
Isochoric

Question 63Single Answer

What is the efficiency of a Carnot cycle dependent on?

A
Heat input
B
Work output
C
Temperature of reservoirs
D
Pressure ratio

Question 64Single Answer

What is the entropy generation in a reversible process?

A
Zero
B
Positive
C
Negative
D
Infinite

Question 65Single Answer

Which law explains why a perpetual motion machine of the second kind is impossible?

A
Zeroth Law
B
First Law
C
Second Law
D
Third Law

Question 66Single Answer

What is the internal energy change for a cyclic process?

A
Zero
B
Positive
C
Negative
D
Q + W

Question 67Single Answer

Which law is violated if heat flows spontaneously from a cold body to a hot body?

A
Zeroth Law
B
First Law
C
Second Law
D
Third Law

Question 68Single Answer

Which process has no heat transfer?

A
Isothermal
B
Isobaric
C
Adiabatic
D
Isochoric

Question 69Single Answer

What is the entropy of a system at absolute zero according to the Third Law?

A
Zero
B
Positive
C
Negative
D
Infinite

Question 70Single Answer

Which cycle is the most efficient for given temperature limits?

A
Rankine cycle
B
Brayton cycle
C
Carnot cycle
D
Otto cycle

Question 71Single Answer

What does the Second Law imply about isolated systems?

A
Energy decreases
B
Entropy increases
C
Temperature decreases
D
Work increases

Question 72Single Answer

Which of the following is a closed system?

A
Boiling water in an open pan
B
Air compressor
C
Water in a sealed bottle
D
River stream

Question 73Single Answer

In which type of system can both energy and mass cross the boundary?

A
Closed system
B
Isolated system
C
Open system
D
Thermally insulated system

Question 74Single Answer

An isolated system allows exchange of:

A
Only energy
B
Only mass
C
Both energy and mass
D
Neither energy nor mass

Question 75Single Answer

What type of system is a pressure cooker while cooking?

A
Open
B
Closed
C
Isolated
D
Ideal

Question 76Single Answer

Which of the following is not a property of a thermodynamic system?

A
Temperature
B
Pressure
C
Volume
D
Work

Question 77Single Answer

Which property is independent of the mass of the system?

A
Volume
B
Internal energy
C
Enthalpy
D
Pressure

Question 78Single Answer

Which one of these is an example of an open system?

A
Gas cylinder
B
Steam turbine
C
Light bulb
D
Thermos flask

Question 79Single Answer

What type of system is an ideal thermos bottle assumed to be?

A
Open
B
Closed
C
Isolated
D
Reversible

Question 80Single Answer

Which of the following changes indicate a thermodynamic process?

A
Pressure only
B
Temperature only
C
Change in state
D
Volume only

Question 81Single Answer

Which process takes place at constant pressure?

A
Isothermal
B
Adiabatic
C
Isochoric
D
Isobaric

Question 82Single Answer

A process in which no heat enters or leaves the system is called:

A
Isothermal
B
Adiabatic
C
Isochoric
D
Isobaric

Question 83Single Answer

Which process occurs at constant temperature?

A
Isobaric
B
Isochoric
C
Isothermal
D
Adiabatic

Question 84Single Answer

In which process does the volume remain constant?

A
Isobaric
B
Isothermal
C
Isochoric
D
Polytropic

Question 85Single Answer

An adiabatic process is characterized by:

A
Constant temperature
B
No heat exchange
C
Constant volume
D
No work done

Question 86Single Answer

In a polytropic process, the equation is:

A
PV = constant
B
PVn = constant
C
P/T = constant
D
TV = constant

Question 87Single Answer

Which process is represented by a vertical line on a P-V diagram?

A
Isothermal
B
Isobaric
C
Isochoric
D
Adiabatic

Question 88Single Answer

Which one of the following properties remains constant in an isothermal process?

A
Pressure
B
Volume
C
Temperature
D
Entropy

Question 89Single Answer

In an adiabatic process, the internal energy change is equal to:

A
Heat added
B
Work done
C
Enthalpy
D
Zero

Question 90Single Answer

Which type of process does not involve any work transfer?

A
Isochoric
B
Isothermal
C
Adiabatic
D
Polytropic

Question 91Single Answer

The internal energy of an ideal gas depends on:

A
Pressure
B
Volume
C
Temperature
D
Enthalpy

Question 92Single Answer

The change in internal energy in an isothermal process is:

A
Zero
B
Minimum
C
Maximum
D
Equal to work

Question 93Single Answer

The heat added in an adiabatic process is:

A
Equal to work done
B
Maximum
C
Zero
D
Minimum

Question 94Single Answer

The second law of thermodynamics deals with:

A
Energy conservation
B
Entropy
C
Pressure-volume relation
D
Specific heat

Question 95Single Answer

Which law states that energy has quality as well as quantity?

A
Zeroth law
B
First law
C
Second law
D
Third law

Question 96Single Answer

Entropy of the universe in a reversible process:

A
Increases
B
Decreases
C
Remains constant
D
Becomes zero

Question 97Single Answer

Which process is used in a Carnot engine?

A
Isobaric and isochoric
B
Isothermal and adiabatic
C
Isochoric and adiabatic
D
Polytropic and isobaric

Question 98Single Answer

What is the unit of entropy?

A
J
B
J/kg
C
J/K
D
J/K•kg

Question 99Single Answer

What does the Zeroth Law of Thermodynamics define?

A
Entropy
B
Heat
C
Temperature
D
Pressure

Question 100Single Answer

For a reversible process, the entropy change of the system and surroundings is:

A
Zero
B
Negative
C
Positive
D
Infinite

Question 101Single Answer

Which device violates the second law if it delivers work without energy input?

A
Heat engine
B
Refrigerator
C
Perpetual motion machine of second kind
D
Air conditioner

Question 102Single Answer

Which of these cycles has maximum possible efficiency?

A
Otto cycle
B
Rankine cycle
C
Diesel cycle
D
Carnot cycle

Question 103Single Answer

Which process occurs at constant enthalpy?

A
Isobaric
B
Isenthalpic
C
Isothermal
D
Isochoric

Question 104Single Answer

Reversible adiabatic process is also known as:

A
Isothermal
B
Polytropic
C
Isentropic
D
Isochoric

Question 105Single Answer

The internal energy of an ideal gas in isothermal process:

A
Increases
B
Decreases
C
Remains same
D
Doubles

Question 106Single Answer

Which law establishes a basis for temperature measurement?

A
Zeroth law
B
First law
C
Second law
D
Third law

Question 107Single Answer

Entropy is a measure of:

A
Temperature
B
Pressure
C
Disorder
D
Enthalpy

Question 108Single Answer

Which law states “It is impossible to reach absolute zero in a finite number of steps”?

A
First
B
Second
C
Third
D
Zeroth

Question 109Single Answer

Which of the following is an example of an irreversible process?

A
Frictionless piston
B
Free expansion
C
Quasi-static compression
D
Reversible adiabatic

Question 110Single Answer

In a Carnot cycle, maximum work is obtained when the cycle operates between:

A
Two isobars
B
Two isotherms
C
Two adiabatics and two isotherms
D
Two isochoric processes

Question 111Single Answer

The thermal efficiency of an ideal Otto cycle depends on:

A
Compression ratio
B
Expansion ratio
C
Heat added
D
Work done

Question 112Single Answer

The compression in Diesel cycle is:

A
Isothermal
B
Adiabatic
C
Isobaric
D
Isochoric

Question 113Single Answer

In the Diesel cycle, the heat addition process takes place at:

A
Constant temperature
B
Constant pressure
C
Constant volume
D
Constant entropy

Question 114Single Answer

Which of the following statements is true about Rankine and Carnot cycles?

A
Rankine cycle is more efficient
B
Both are equally efficient
C
Carnot cycle is more efficient
D
Efficiency is the same for same operating temperature

Question 115Single Answer

Superheating in a Rankine cycle is done to:

A
Increase thermal efficiency
B
Reduce turbine work
C
Increase condenser pressure
D
Reduce boiler size

Question 116Single Answer

In an ideal gas, internal energy is a function of:

A
Pressure
B
Volume
C
Temperature
D
Both pressure and volume

Question 117Single Answer

Specific enthalpy is defined as:

A
Internal energy per unit volume
B
Internal energy per unit mass
C
Enthalpy per unit volume
D
Enthalpy per unit mass

Question 118Single Answer

Which of the following is not a point function?

A
Pressure
B
Work
C
Temperature
D
Enthalpy

Question 119Single Answer

The dryness fraction of wet steam is defined as:

A
Mass of water/mass of mixture
B
Mass of vapor/mass of mixture
C
Mass of vapor/mass of water
D
Mass of vapor/mass of solid

Question 120Single Answer

At critical point, the properties of liquid and vapor phases are:

A
Equal in volume
B
Different in pressure
C
Identical
D
Constant

Question 121Single Answer

The process of converting water to steam without increasing temperature is:

A
Superheating
B
Sublimation
C
Saturation
D
Boiling

Question 122Single Answer

Which device is used to measure dryness fraction of steam?

A
Throttling calorimeter
B
Venturimeter
C
Anemometer
D
Manometer

Question 123Single Answer

Which cycle is used in steam power plants?

A
Otto cycle
B
Rankine cycle
C
Diesel cycle
D
Stirling cycle

Question 124Single Answer

The phase rule is given by:

A
Carnot
B
Clapeyron
C
Gibbs
D
Joule

Question 125Single Answer

Triple point of water is:

A
°C and kPa
B
K and atm
C
K and Pa
D
K and atm

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