Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
He was in the temper
B
and refused
C
discuss the matter again
D
No error
Question 2Single Answer
Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
A flower makes no garland
B
so we must do a thing together
C
in a unit for a good result
D
No error
Question 3Single Answer
Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
My friend is a software engineer
B
and his wife is doctor
C
so they don’t have enough time for each other
D
No error
Question 4Single Answer
Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
I don’t have much time that
B
I hear you in detail with verbosity
C
tell everything in nutshell
D
No error
Question 5Single Answer
Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
The atmosphere is changing
B
so I have severe pain in my body
C
if you have any painkiller, please give it to me
D
No error
Question 6Single Answer
Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
No one is without fault
B
because no one is God
C
and only God is fault free
D
No error
Question 7Single Answer
Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
Your
B
clock is
C
one hour fast
D
No error
Question 8Single Answer
Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
The lose of jobs
B
is regarded by some as an necessary evil
C
in the fight against infliation
D
No error
Question 9Single Answer
Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
In science, the credit goes to a man
B
who convinces the world
C
not to the man to whom the idea first occurs
D
No error
Question 10Single Answer
Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.
A
It is only after
B
the match is over
C
that people realize how exciting it is
D
No error
General Awareness
Question 11Single Answer
Yojna a weekly journal
A
Ministry of Finance
B
Ministry of Information and Broadcastin
C
Ministry of Rural Development
D
Planning Commission
Question 12Single 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 13Single 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 14Single 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 15Single Answer
Which of the following is not a synthetic fibre:
A
Anygora
B
Rayon
C
Nylon
D
Polyster
Question 16Single Answer
Which of the following contain enzymes for cellular respiration ?
A
Dictyosomes
B
Endoplasmic reticulum
C
lysosomes
D
Mitochondria
Question 17Single 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 18Single Answer
How many districts are there in Uttar Pradesh
A
60
B
57
C
75
D
87
Question 19Single Answer
What are the official languages of Uttar Pradesh ?
A
Hindi & Urdu
B
Only Hindi
C
Only Urdu
D
Kumaoni
Question 20Single Answer
How many members of Lok Sabha from Uttar Pradesh ?
A
56
B
78
C
80
D
51
Question 21Single Answer
How many members of Rajya Sabha from Uttar Pradesh ?
A
45
B
51
C
31
D
77
Question 22Single Answer
Who recently won the Australian Open 2023 Men's Singles title ?
A
Rafael Nadal
B
Carlos Alcaraz
C
Novak Djokovic
D
Stefanos Tsitsipas
Question 23Single Answer
Which country has been elected as the President of the UN Security Council for the month of [insert current month] ?
A
India
B
USA
C
China
D
France
Question 24Single Answer
The "Khelo India Youth Games" were recently held in which Indian state ?
A
Madhya Pradesh
B
Maharashtra
C
Gujarat
D
Uttar Pradesh
Question 25Single Answer
Name the newly launched satellite by ISRO aimed at disaster management support .
A
EOS - 07
B
RISAT - 2BR1
C
GSAT - 32
D
Cartosat - 3C
Logical Ability
Question 26Single Answer
Passage :
Direction:Study the given information carefully and answer the given question
P, Q, R, S, T, V, X and Y are seated in a straight line facing North. P sits fourth to the left of V. V sits either sixth from the left end of the line or fourth from the right end of the line. S sits second to the right of R. R is not an immediate neighbor of V. T and Q are immediate neighbours of each other but neither T not Q sits at extreme ends of the line. Only one person sits between T and X. X does not sit at the extreme end of the line
According to the passage, what is the main purpose of data protection laws ?
A
To ensure that foreign countries invest in research for drugs to treat diseases like TB
B
To attract Indian scientists back to the country
C
To prevent misuse of research to make profit by competing companies
D
To make clinical trials more acceptable to the public
E
None of these
Question 27Single Answer
‘Gram’ is relatd to ‘Mass’ in the same way as ‘Centimetre’ is related to
A
Area
B
Volume
C
Length
D
Sound
E
Energy
Question 28Single Answer
'Mustard' is related to 'Seed' in the same way as 'Carrot' is related to
A
Fruit
B
Stem
C
Flower
D
Root
E
None of these
Question 29Single Answer
Which of the following pairs of words have the same relationship as Fan : Heat?
A
Water : Drink
B
Light : Night
C
Teach : Student
D
Air : Breathe
E
Food : Hunger
Question 30Single Answer
'Radish' is related to 'Root', in the same way as 'Brinjal' is related to
A
Fruit
B
Stem
C
Flower
D
Root
E
None of these
Question 31Single Answer
'Jackal' is related to 'Carnivorous', in the same way as 'Goat' is related to
A
Omnivorous
B
Carnivorous
C
Herbivorous
D
Multivorous
E
None of these
Question 32Single Answer
Which of the following pairs has similar relationship as Run : Race?
A
Party : Dance
B
Study : Book
C
Lecture : Study
D
Enjoy : Journey
E
None of these
Question 33Single Answer
Which of the following has same relationship as that of Money : Wealth?
A
Pity : Kindness
B
Cruel : Anger
C
Wise : Education
D
Pride : Humility
E
None of these
Question 34Single Answer
Which of the following is related to ‘Melody’, in the same way as ‘Delicious’ is related to 'Taste'?
A
Memory
B
Highness
C
Tongue
D
Speak
E
Voice
Question 35Single Answer
Offhand’ is related to ‘Premeditation’ in the same way as ‘Above board’ is related to
A
Integrity
B
Honesty
C
Guide
D
Competition
E
None of these
Quantitative Aptitude
Question 36Single Answer
The cash difference between the selling prices of an article at a profit of 4% and 6% is Rs. 3. The ratio of the two selling prices is:__________ ?
A
51:52
B
52:53
C
51:53
D
52:55
Question 37Single Answer
Which of the following numbers is irrational ?
A
√49
B
0.125
C
√2
D
22/7
Question 38Single Answer
356 x 936 – 356 x 836 = ?
A
35600
B
34500
C
9630
D
93600
Question 39Single Answer
Arrange in descending order: 5/8, 7/10, 3/4
A
3/4 > 7/10 > 5/8
B
7/10 > 3/4 > 5/8
C
3/4 > 5/8 > 7/10
D
5/8 > 7/10 > 3/4
Question 40Single Answer
What is (3^{4} times 9^{2}) ?
A
36
B
38
C
310
D
96
Question 41Single Answer
If 34X-2 = 729, then find the value of X.
A
4
B
3
C
2
D
5
Question 42Single Answer
Convert 0.6 into fraction ?
A
3/5
B
2/3
C
4/5
Question 43Single Answer
The no. plate of a bus had peculiarity. The bus number was a perfect square. It was also a perfect square when the plate numbers were reversed. The bus company had only five hundred buses numbered from 1 to 500. What was the number ?
A
169
B
36
C
196
D
Can not say
Question 44Single Answer
If a and b are positive integers, such that ab = 125, then (a-b)a+b-4 = ?
A
16
B
25
C
28
D
30
Question 45Single Answer
If x*y = x2 + y2 – xy, then value of 9*11 is
A
93
B
103
C
60.5
D
121
Question 46Single Answer
Which is greater ?
A
15/16
B
17/18
C
Equal
D
Cannot compare
Question 47Single Answer
If sum of two numbers is 42 and their product is 437, then find their difference.
A
3
B
4
C
5
D
7
Question 48Single Answer
Write the 44000 in Roman numerals
A
XLI
B
XLVI
C
XLIV
D
XLVIC
Question 49Single Answer
Convert 0.0909… into fraction ?
A
1/11
B
9/11
C
1/9
D
9/10
Question 50Single Answer
What is (98 times 102) ?
A
9996
B
10000
C
10096
D
10196
Important Questions Package
UPMRC Station Controller Exam Online Question Bank Package
Buy UPMRC Station Controller Important Questions, MCQ, question answer in Hindi & English. It will help you to score high marks in UPMRC Station Controller question bank 2026 in Online, PDF & Print study material.
+ Free Monthly Current Affairs, GK & more PDF Download
Sr.
Package Name
Amount
1.
UPMRC Station Controller (Electrical) Exam - Hindi
Description : 2000 Question with Answer.
₹151[₹500]
2.
UPMRC Station Controller (Electrical) Exam - Hindi
Description : 1000 Question with Answer.
₹101[₹500]
3.
UPMRC Station Controller (Electrical) Exam - English
Description : 1000 Question with Answer.
₹101[₹500]
4.
UPMRC Station Controller (Electrical) Exam - English
Description : 2000 Question with Answer.
₹151[₹500]
5.
UPMRC Station Controller (Electrical) Exam - Hindi
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹101[₹450]
6.
UPMRC Station Controller (Electrical) Exam - English
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹101[₹450]
7.
UPMRC Station Controller (Electrical) Exam Question Bank Book - Hindi
Description : 1000 Question with Answer (Printed Material)
₹450[₹800]
8.
UPMRC Station Controller (Electrical) Exam Question Bank Book - English
Description : 1000 Question with Answer (Printed Material)
₹390[₹600]
Electrical
Question 51Single Answer
Resistance switching is normally resorted in case of
A
Air blast CB
B
Bulk oil CB
C
Minimum oil CB
D
All types of CB
Question 52Single Answer
By transmitting power at high voltage
A
it will give poor voltage regulation
B
it will give better voltage regulation
C
it will not effect voltage regulation
D
None of these
Question 53Single Answer
Which statement about the daily load curve is valid ?
A
The area under the curve gives the average demand
B
The ratio of the area under the curves to the total area of rectangle in which it is contained gives the load factor for the day
C
The peak of the curve gives the installed capacity of the plant
D
The area of the curves divided by the number of hours gives load factor
Question 54Single Answer
High voltage Schring bridge is used to measure
A
large capacitance without additional element
B
small capacitance without additional element
C
medium value capacitance
D
None of these
Question 55Single Answer
Draw - in - system of laying underground cables has the drawback (s) of
A
higher cost
B
reduced current carrying capacity of the cables
C
requirements of much deeper and wider trenches
D
repairs, alterations or additions difficult
E
all of the above except
Question 56Single Answer
Surge impedance of a transmission line is
A
independent of its length
B
dependent on its length
C
independent on its temperature
D
none of the above
Question 57Single Answer
If two synchronous generators connected in parallel loose synchronism, it will lead to
A
stalling of generators
B
wild fluctuations in current
C
wild fluctuations in current and voltage
D
None of these
Question 58Single Answer
A differential relay responds to
A
algebraic difference of two or more similar electrical quantities
B
vector difference of two or more similar electrical quantities
C
algebraic difference between two currents
D
algebraic difference between two voltages
Question 59Single Answer
The conductor carries more current on the surface in comparison to its core. This phenomenon is called the
A
Skin effect
B
Corona
C
Ferranti effect
D
Lenz's effect
Question 60Single Answer
A booster is connected in
A
series with the feeder
B
parallel with the feeder
C
both (a) and (b) are correct
D
none of these
Question 61Single Answer
Fuses have got advantages of
A
cheapest type of protection
B
inverse time - current characteristic
C
no maintenance
D
current limiting effect under short - circuit conditions
E
all of the above
Question 62Single Answer
The power transmitted will be maximum when
A
line reactance is high
B
corona losses are minimum
C
sending end voltage is more
D
receiving end voltage is more
Question 63Single Answer
The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The load factor of the consumer is
A
0.75
B
0.375
C
1.33
D
None of these
Question 64Single Answer
In a transformer, the exciting current will be in phase quadrature with the impressed voltage provided
A
only the leakage impedance drop is ignored
B
only the core loss is ignored
C
both the leakage impedance drop and the core loss are ignored
D
only the no - load copper loss is ignored
Question 65Single Answer
Which of the following techniques is used for the measurements of a.c. high frequency voltages ?
A
Peak voltmeter
B
Series resistance mircro - ammeter
C
Resistance potential divider
D
All of these
Question 66Single Answer
Use of additional shunt capacitor can be made for increasing the capability of line as it
A
reduces surge impedance Z0
B
increases phase shift β
C
increase in α
D
all of the above
Question 67Single Answer
The sag of a transmission line is least affected owing to
A
weight of the conductor
B
current through the conductor
C
atmospheric temperature
D
ice deposited on the conductor
Question 68Single Answer
In case of Impulse Thermal break down of solid insulating materials, the critical electric field is proportional to
A
critical absolute temperature
B
square of critical absolute temperature
C
square of T0
D
none of these
Question 69Single Answer
The insulation of the modern EHV lines is designed based on
A
corona
B
switching voltages
C
lightning voltage
D
all of these
Question 70Single Answer
For constant voltage transmission, the voltage drop along the line is maintained constant by installing
A
capacitors
B
inductors
C
resistors
D
synchronous phase modifiers at the receiving end
Question 71Single Answer
AC network analyser is employed for solving the problems of
A
load flow
B
load flow and stability
C
load flow and short - circuit
D
load flow, stability and short - circuit
Question 72Single Answer
The change in excitation in an alternator connected to an infinite line provides a corresponding change in
A
terminal voltage
B
speed of rotor
C
power generated
D
power factor
Question 73Single Answer
Different types of insulators used for transmission lines are
A
pin type only
B
suspension type only
C
strain type only
D
pin type, suspension type and shackle type
Question 74Single Answer
The conductor connecting consumer's terminals to the distributor is called the
A
feeder
B
distributor
C
service main
D
none of the above
Question 75Single Answer
Which of the following method or techniques can be used for the measurement of high d.c. voltages ?
A
Generating voltmeter
B
Electrostatic voltmeter
C
Peak voltmeter
D
Half effect generators
Question 76Single Answer
The ripple voltage in dc output is small if
A
frequency of supply voltage is small
B
the filtering capacitor is small
C
load current is small
D
none of these
Question 77Single Answer
The voltage measurements using uniform spark gap are
A
affected by dust particles
B
affected by polarity of supply
C
affected by temperature
D
none of these
Question 78Single Answer
Neutral earthing is provided for
A
the safety of personnel from electric shock
B
the safety of equipment and personnel against lightning and voltage surges
C
reducing the voltage stress on lines and equipment with respect to earth under various operating and fault conditions
D
controlling the earth fault currents for protective relaying
E
both (c) and (d)
Question 79Single Answer
The function of Lightning arrester is
A
to limiting the short - circuit fault current
B
to provide path to high voltage surge to earth
C
to reduce arcing
D
none of these
Question 80Single Answer
In which of the following cases are delay fuses used ?
A
For the protection of light circuits
B
For the protection of power out - let circuits
C
For the protection of fluorescent lamps
D
For the protection of motors
Question 81Single Answer
In order to improve the voltage profile of the line, compensation is resorted by providing
A
capacitors at the receiving end
B
reactors at the receiving end
C
resistors at the receiving end
D
none of these
Question 82Single Answer
Skin effect in conductor is proportional to
A
(diameter of conductor) 1/2
B
diameter of conductor
C
(diameter of conductor)2
D
(diameter of conductor)4
Question 83Single Answer
The function of steel wire in an ACSR conductor is to
A
compensate for skin effect
B
take care of surges
C
provide additional mechanical strength
D
reduce inductance
Question 84Single Answer
A fault is more severe from the view point of RRRV if it is a
A
Short length fault
B
Medium length line fault
C
Long length line fault
D
None of these
Question 85Single Answer
Protective resistance to be connected between the sphere gap and the test equipment is required while measuring
A
power frequency and higher frequency a.c. voltage
B
power frequency and impulse voltage
C
all kinds of voltages
D
none of these
Question 86Single Answer
Series capacitor is used in a transmission line to
A
compensate the voltage drop
B
reduce line loss
C
limit short circuit current
D
improve load power factor
Question 87Single Answer
The passive element that is used as interconnecting element for the stable operation of interconnected system is
A
reactor
B
resistor
C
capacitor
D
resistor and capacitor
Question 88Single Answer
Corona loss in a transmission line is dependent on
A
diameter of the conductor
B
material of the conductor
C
height of the conductor
D
none of these
Question 89Single Answer
In a minimum oil circuit breaker the oil is used
A
to act as circuit breaking medium only
B
for circuit breaking and providing insulation
C
for providing insulation only
D
for none of the above purposes
Question 90Single Answer
Skin effect is
A
proportional to frequency
B
proportional to square of frequency
C
inversely proportional to frequency
D
independent of frequency
Question 91Single Answer
Rated making capacity of breaker is equal to
A
X rated symmetrical breaking capacity
B
2.55 X rated symmetrical breaking capacity
C
1 X rated symmetrical breaking capacity
D
none of these
Question 92Single Answer
The main reason for using high voltage for long distance power transmission is
A
reduction in transmission losses
B
reduction in time of transmission
C
increase in system reliability
D
none of the above
Question 93Single Answer
Bus - coupler is very essential in
A
single bus - bar arrangement
B
ring bus - bar arrangement
C
double bus, double breaker arrangement
D
main and transfer bus
Question 94Single Answer
With the rise in temperature, the insulation resistivity
A
remains unchanged
B
decreases linearly
C
increases linearly
D
reduces exponentially
Question 95Single Answer
The effect of bonding the cable is
A
to increase the effective resistance and inductance
B
to increase the effective resistance but reduce inductance
C
to reduce the effective resistance and inductance
D
to reduce the effective resistance but increase the inductance
Question 96Single Answer
Increase in temperature in overhead transmission lines causes
A
increase in stress and length
B
decrease in stress and length
C
decrease in stress but increase in length
D
none of the above
Question 97Single Answer
The insulation resistance of the cable decreases with the
A
increase in length of cable
B
decrease in length of cable
C
electric stresses
D
none of these
Question 98Single Answer
Corona has the disadvantage(s) of
A
power loss
B
interference with neighbouring communication circuits
C
introducing the harmonics, predominately third harmonics, into the transmission lines
D
all of the above
Question 99Single Answer
In a load duration curve for an intergrated power system the uppermost crest represents the energy contributed by
A
base power stations
B
major thermal stations
C
peaking hydro or gas turbine stations
D
non - conventional power stations
Question 100Single Answer
At bridge crossing and near the railway track ternary lead cables are used because they
A
are of high tensile strength
B
are of low coefficient of thermal expansion
C
are of low specific gravity
D
can withstand shocks and vibrations
Question 101Single Answer
The heat produced at the contact point owing to flow of electric current is least affected by
A
temperature of the surrounding medium
B
contact resistance
C
magnitude of electric current flowing
D
duration of flow of current
Question 102Single Answer
A stationary alternator should not be connected to the live bus - bar because
A
it is likely to operate as a synchronous motor
B
it will get short - circuited
C
it will reduce bus - bar voltage
D
all of the above
Question 103Single Answer
In a transmission system the feeder supplies power to
A
transformer substations (step - up)
B
service mains
C
distributors
D
all of the above
Question 104Single Answer
For a given amount of power to be transmitted over a certain distance with fixed power loss, the volume of copper required is
A
directly proportional to voltage
B
inversely proportional to voltage
C
inversely proportional to the square of voltage and pf of the load
D
directly proportional to the square of the voltage and pf of the load
Question 105Single Answer
Power despatch through a line can be increased by
A
installing series capacitors
B
installing shunt capacitors
C
installing series reactor
D
installing shunt reactor
Question 106Single Answer
In the figure shown which curve represents the variation of cost of generation per kWh with the load factor, for a thermal power plant ?
A
Curve A
B
Curve B
C
Curve C
D
Curve D
Question 107Single Answer
Under 'no load conditions the current in a transmission line is because of
A
capacitance effect
B
corona effect
C
proximity effect
D
back flow from earth
Question 108Single Answer
The only advantage of corona is that it
A
produces a pleasing luminous glow
B
makes line current sinusoidal
C
works as a safety valve for surges
D
ozone gas is produced
Question 109Single Answer
Earth wires are made of
A
copper
B
aluminium
C
iron
D
galvanised stranded steel
Question 110Single Answer
The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The demand factor of the consumer is
A
0.75
B
0.375
C
1.33
D
none of the above
Question 111Single Answer
A lightning arrester connected between the line and earth in a power system
A
protects the terminal equipment against travelling surges
B
protects the terminal equipment against direct lightning stroke
C
suppresses high frequency oscillations in the line
D
reflects back the travelling waves approaching it
Question 112Single Answer
Oil filled cables have the advantage(s) of
A
smaller overall size
B
most perfect impregnation
C
easy detection of fault
D
all of the above
Question 113Single Answer
A bus coupler circuit breaker is utilised in a substation for
A
joining the transmission line with station bus - bar
B
joining main and transfer bus in a substation
C
joining the generator with transfer
D
joining the neutral of the generator with earth
Question 114Single Answer
The fluids used in circuit breakers should be of
A
high dielectric strength and thermal stability
B
non - inflammability
C
are extinguishing ability
D
all of the above
Question 115Single Answer
Feeder is designed mainly from the point of view of
A
its current carrying capacity
B
voltage drop in it
C
operating voltage
D
operating frequency
Question 116Single Answer
Power output per unit volume of an MHD generator is proportional to
A
specific electrical conductivity of gas
B
square of the magnetic field strength
C
square of the fluid velocity
D
all of the above
Question 117Single Answer
Increase in frequecy of transmission line causes
A
no change in line resistance
B
increase in line resistance
C
decrease in line resistance
D
decrease in line series reactance
Question 118Single Answer
A dc series generator can excite itself
A
only on zero load current
B
only when load current is not zero
C
irrespective of the value of load current
D
none of the above
Question 119Single Answer
Thermal relays are used for protection of motors against over - current owing to
A
short - circuits
B
heavy loads
C
earth fault
D
all of these
Question 120Single Answer
Transmission efficiency of a transmission line increases with the
A
decrease in power factor and voltage
B
increase in power factor and voltage
C
increase in power factor but decrease in voltage
D
increase in voltage but decrease in power factor
Question 121Single Answer
While using air - blast circuit breaker, current chopping is a phenomenon often observed when
A
a long overhead line is switched off
B
a bank of capacitors is switched off
C
a trasformer on no - load is switched off
D
none of these
Question 122Single Answer
The contact resistance of a circuit breaker is about
A
20 Ω
B
2 Ω
C
20 mΩ
D
20 μΩ
Question 123Single Answer
Metallic shielding is provided on underground cables to
A
reduce thermal resistance
B
reduce corona effect
C
control the electrostatic voltage stress
D
all of the above
Question 124Single Answer
The most economical limit of power factor correcting is governed by
A
original power factor
B
relative costs of the supply and power factor correction equipment
C
both (a) and (b)
D
none of the above
Question 125Single Answer
A short - circuit current is identified by
A
heavy current flow
B
voltage rise
C
voltage drop
D
none of these
Question 126Single Answer
Which of the following materials is not used for transmission and distribution of electrical power ?
A
Tungsten
B
Copper
C
Aluminium
D
Cadmium copper
Question 127Single Answer
Which of the following alternators will have maximum number of poles ?
A
Alternator coupled to hydraulic turbine
B
Alternator coupled to steam turbine
C
Alternator coupled to gas turbine
D
All will have same number of poles
Question 128Single Answer
In humid weather, the corona occurs at a voltage
A
much less than the needed in fair weather
B
much higher than that needed in fair weather
C
equal to that needed in fair weather
D
none of the above
Question 129Single Answer
Short - circuit currents are due to
A
single phase to earth fault
B
phase to phase fault
C
all the three phases to earth fault
D
all the three phases short - circuited
E
any of the above
Question 130Single Answer
Over - current protection respond to
A
increase in current above pick - up value
B
single line to earth faults
C
double line to earth faults
D
all of the above
Question 131Single Answer
A fuse is
A
always connected in series with the circuit
B
always connected in parallel with the circuit
C
normally connected in series with the circuit
D
none of these
Question 132Single Answer
Standard impulse testing of power transformer requires
A
one application of chopped wave followed by one application of full - wave
B
two applications of chopped wave followed by an application of a full - wave
C
one application of chopped wave followed by two application of a full - wave
D
none of these
Question 133Single Answer
The presence of earth in case of overhead lines
A
increases the capacitance
B
increases the inductance
C
decreases the capacitance and increases the inductance
D
does not effect any of the line constants
Question 134Single Answer
Partial discharge measurement on a cable gives
A
p.f of the cable
B
loss angle of the cable
C
location of fault
D
None of these
Question 135Single Answer
Any leakage of air into the condenser destroys the vacuum and causes
A
an increase in air pressure in the condenser limiting the useful heat drop in the steam turbine
B
lowering of the partial pressure of the steam and of the saturation temperature along with it
C
undercooling of the condensate more severe
D
all of the above
Question 136Single Answer
The intersheaths in cables are used to
A
provide proper stress distribution
B
minimize the stress
C
provide protection against moisture and voltage surges
D
provide protection against current and voltage surges
Question 137Single Answer
The string efficiency of insulators can be increased by
A
reducing the number of strings
B
increasing the number of strings
C
correct grading of insulators of various strings
D
none of these
Question 138Single Answer
Which one of the following statements regarding the position of minimum copper loss in a phase of rotary convertor is true ?
A
The position of minimum copper loss is in the middle of the phase whatever may be the power factor
B
The position of minimum copper loss varies with the variation in power factor and this position is displaced from the middle of the phase by the power factor angle
C
The position of minimum copper loss is the tapping point whatever may be the power factor
D
None of the above
Question 139Single Answer
In order to have lower cost of electrical generation
A
the load factor and diversity factor should be high
B
the load factor should be low but diversity factor high
C
the load factor should be high but diversity factor low
D
the load factor and diversity factor should be low
Question 140Single Answer
The stability limit of system is defined as the value of power below which
A
the system is stable and above which also stable
B
the system is unstable and above which it is stable
C
the system is stable and above which it is unstable
X rated symmetrical breaking capacity