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
Sattriya dance form is famous in which of these states ?
A
Assam
B
Himachal Pradesh
C
Punjab
D
Tamil Nadu
Question 7Single Answer
"Who said, 'India was a parrot unto itself'?
A
Malik Muhammad Joyce
B
Raskhan
C
Rich Khusrow
D
Rich Hasan
Question 8Single Answer
Which is the national game of Bhutan ?
A
badminton
B
basketball
C
football
D
archery
Question 9Single Answer
When was the Constituent Assembly of India formed?
A
1946
B
1947
C
1948
D
1950
Question 10Single 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 11Single Answer
What is the study of ethics primarily concerned with ?
A
Economic behavior
B
Human values and moral principles
C
Physical health
D
Political systems
Question 12Single Answer
Which is the longest river in India?
A
Yamuna
B
Ganges
C
Brahmaputra
D
Godavari
Question 13Single Answer
The Western Ghats are also known as:
A
Sahyadris
B
Vindhyas
C
Satpuras
D
Aravallis
Question 14Single Answer
Who won the 2024 FIFA Ballon d'Or award?
A
Lionel Messi
B
Cristiano Ronaldo
C
Kylian Mbappé
D
Robert Lewandowski
Question 15Single Answer
The 'One Sun, One World, One Grid' initiative was launched by which organization?
A
United Nations
B
International Solar Alliance
C
World Bank
D
European Union
Reasoning
Question 16Single Answer
How many such pairs of letters are there in the word ‘CLEANLINESS’ each of the which has as many letters between them in the word as they have in the English alphabet, in the same sequence?
A
Two
B
Three
C
Five
D
Four
E
None of these
Question 17Single Answer
Team A has scored more goals than Team B
Team C has scored fewer goals than Team B
Team A has scored fewer goals than Team C .
If the first two statements are true, the third statement is
A
True
B
False
C
Uncertain
D
None
Question 18Single Answer
If it is possible to make only one meaningful word with the second, the third, the sixth and the eight letters of the word FRAGMENT using each only once, which of the following will be the third letter of that word ? If no such word can be formed, give ‘X’ as the answer and if more than one such word can be formed, give ‘Y’ as the answer.
A
A
B
E
C
T
D
X
E
Y
Question 19Single Answer
How many such letters are there in the word ORIENTAL each of which is as far away from the beginning of the word as when they are arranged alphabetically?
A
None
B
One
C
Two
D
Three
E
More than three
Question 20Single Answer
How many such pairs of letters in the word CREDIT each of which has as many letters between them in the word as in the English alphabet?
A
None
B
One
C
Two
D
Three
E
More than three
Question 21Single Answer
How many meaningful words can be made from the letters ‘LMEA’ using each letter only once in each word?
A
None
B
One
C
Two
D
Three
E
More than three
Question 22Single Answer
If it is possible to make only one meaningful word with the first, the second, the seventh and the eighth letters of the word TEMPORAL, which of the following will be the first letter of that word? If more than one such word can be made, give ‘Y’ as the answer and if no such word can be made, give ‘X’ as the answer.
A
T
B
L
C
E
D
Y
E
X
Question 23Single Answer
If the letters of the word HANDOVER are arranged alphabetically from left to right how many letters will remain at the same position?
A
None
B
One
C
Two
D
Three
E
More than three
Question 24Single Answer
How many such pairs of letters are there in the word EXCURSION, each of which has as many letters between them in the word as they have in the English alphabet?
A
None
B
One
C
Two
D
Three
E
More than three
Question 25Single Answer
If it is possible to make only one meaningful word with the first, the second, the third, the sixth and the eighth letters of the word DEVIATION first letter of that word is your answer? If more than one such word can be made formed your answer is ‘A’ and if no such word can be formed your answer is ‘B’.
A
V
B
T
C
E
D
A
E
B
Question 26Single 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 27Single 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 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 28Single 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 29Single 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 30Single 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
Concerned Discipline (Electrical)
Question 31Single 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 32Single 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 33Single 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 34Single 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 35Single 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 36Single 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 37Single 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 38Single 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 39Single 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 40Single 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 41Single 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 42Single 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 43Single 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 44Single 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 45Single 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 46Single 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 47Single 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 48Single 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 49Single 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 50Single 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
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Concerned Discipline (Electrical)
Question 51Single 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 52Single 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 53Single 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 54Single 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 55Single 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 56Single 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 57Single 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 58Single 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 59Single 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 60Single 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 61Single 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 62Single 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 63Single 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 64Single 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 65Single 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 66Single 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 67Single 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 68Single 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 69Single 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 70Single Answer
Skin effect is
A
proportional to frequency
B
proportional to square of frequency
C
inversely proportional to frequency
D
independent of frequency
Question 71Single 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 72Single 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 73Single 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 74Single Answer
With the rise in temperature, the insulation resistivity
A
remains unchanged
B
decreases linearly
C
increases linearly
D
reduces exponentially
Question 75Single 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 76Single 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 77Single 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 78Single 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 79Single 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 80Single 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 81Single 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 82Single 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 83Single 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 84Single 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 85Single 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 86Single 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 87Single 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 88Single 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 89Single Answer
Earth wires are made of
A
copper
B
aluminium
C
iron
D
galvanised stranded steel
Question 90Single 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 91Single 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 92Single 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 93Single 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 94Single 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 95Single 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 96Single 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 97Single 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 98Single 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 99Single 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 100Single 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 101Single 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 102Single Answer
The contact resistance of a circuit breaker is about
A
20 Ω
B
2 Ω
C
20 mΩ
D
20 μΩ
Question 103Single 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 104Single 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 105Single Answer
A short - circuit current is identified by
A
heavy current flow
B
voltage rise
C
voltage drop
D
none of these
Question 106Single 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 107Single 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 108Single 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 109Single 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 110Single 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 111Single 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 112Single 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 113Single 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 114Single 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 115Single 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 116Single 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 117Single 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 118Single 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 119Single 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 120Single 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
D
none of these
Question 121Single Answer
Swing equation represents
A
the variation of power with respect to time
B
the variation of torque angle with respect to time
C
the variation of input power with respect to time
D
none of these
Question 122Single Answer
In case of Impulse Thermal breakdown of insulating materials, the critical time to breakdown is
A
proportional to critical electric field
B
inversely proportional to critical electric field
C
proportional to square of critical absolute temperature
D
none of these
Question 123Single Answer
Economiser in a steam power plant
A
improves the boiler efficiency by 10 - 12 %
B
saves fuel consumption by 5 - 15 %
C
becomes a necessity for pressure
D
none of these
Question 124Single Answer
Conductor configuration determine
A
inductance
B
sag
C
voltage
D
current
Question 125Single Answer
If the length of the arc of circuit breaker increases, its resistance
A
be extinguished
B
decreases
C
remains same
D
none of these
Question 126Single Answer
If the frequency of a transmission system is changed from 50 Hz to 100 Hz, the string efficiency
A
will increase
B
will decrease
C
remain unchanged
D
may increase or decrease depending on the line parameters
Question 127Single Answer
The pressurised water reactors employ
A
light water and natural uranium
B
heavy water and enriched uranium
C
light water and enriched uranium
D
none of the above combinations
Question 128Single Answer
The suitable turbine used for harnessing tidal power is
A
Francis turbine
B
Pelton turbine
C
Kaplan turbine
D
None of these
Question 129Single Answer
In an AC Transmission line, difference in phase of voltages at the two ends of the line is due to
A
resistance of line
B
system voltage
C
reactance of line
D
insulators
Question 130Single Answer
Steam power plants work closely on
A
Binary vapour cycle
B
Brayton cycle
C
Rankine cycle
D
Carnot cycle
Question 131Single Answer
If the tariff for electrical energy charges provides incentive by way of reduced charges for higher consumption, then it may be concluded that the
A
load factor is high
B
power factor is high
C
plant has sufficient reserve capacity
D
power is generated through hydro - power plant
Question 132Single Answer
In overhead lines, the presence of earth wire causes
A
increase in the capacitance
B
increase in the inductance
C
decrease in the capacitance
D
decrease in the inductance
Question 133Single Answer
The use of reactors permits circuit breakers of the installation of
A
lower rating
B
higher rating
C
same rating
D
none of these
Question 134Single Answer
In power plants, the condenser normally used is
A
Surface type
B
Jet type
C
Both surface and jet type
D
Regenerative type
Question 135Single Answer
The critical mass of a nuclear reactor depends upon
A
the enrichment of the fuel used
B
the moderator material used
C
both the enrichment of fuel and moderator material
D
none of these
Question 136Single Answer
When the load on a transmission line is equal to the surge impedance loading
A
the receiving end voltage is less than the sending end voltage
B
the sending end voltage is less than the receiving end voltage
C
the receiving end voltage is equal to the sending end voltage
D
none of these
Question 137Single Answer
In a power plant, a reserve generating capacity which is not in service but is in operation is known as
A
hot reserve reserve
B
cold
C
firm power
D
spinning reserve
Question 138Single Answer
What is the advantage of hydro - electric power stations over thermal power stations ?
A
The initial cost of hydro - electric power stations is low .
B
Their operating cost is low .
C
Hydro - electric power stations can supply the same power throughout the year .
D
Hydro - electric power stations can be constructed where electric energy is required .
Question 139Single Answer
Galvanised steel wire is usually used as
A
stay wire
B
earth wire
C
structural components
D
all of the above
Question 140Single Answer
It is always economical to improve the p.f. of an installation to
A
zero
B
unity
C
a little less than unity
D
a little more than unity
Question 141Single Answer
The efficiency of a transmission line
A
increases with the decrease in load p.f.
B
is independent of load p.f.
C
increases with the increase in load p.f.
D
decreases with the increase in load p.f.
Question 142Single Answer
If the source is not able to supply charging current required by the test cable, it is desirable to use
A
shunt capacitor
B
series capacitor
C
series inductor
D
none of these
Question 143Single Answer
Isolated neutral transmission system is not recommended as the
A
system insulation is overstressed due to over - voltages
B
insulation overstress may lead to its failure resulting in phase to phase faults
C
system is not adequately protected against earth fault
D
all of the above
Question 144Single Answer
The power loss in an overload transmission line is mainly due
A
impedance of the line conductor
B
resistance of each conductor
C
inductance of each conductor
D
capacitance of each conductor
Question 145Single Answer
Sulphur hexafluoride cable is insulated by
A
impregnated paper
B
polyvinyl chloride
C
high pressure oil
D
compressed gas
Question 146Single Answer
The voltage of a bus can be controlled by controlling the
A
phase angle
B
reactive power of the bus
C
active power of the bus
D
phase angle and the reactive power
Question 147Single Answer
A three phase breaker is rated at 2000 MV A, 33 kV, its making current will be
A
35 kA
B
70 kA
C
89 kA
D
160 kA
Question 148Single Answer
The insulation used in a cable designed for use on 1000 kV is usually
A
impregnated paper
B
compressed SF, gas
C
PVC
D
any of the above
Question 149Single Answer
The main function of under voltage protective device generally employed with a motor starter is to power
A
open the supply circuit on failure of supply
B
control the motor voltage
C
prevent the opening of supply circuit
D
none of the above
Question 150Single Answer
Which of the following power plants is free from environmental problems ?
X rated symmetrical breaking capacity