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question_answer1)
In a minimum oil circuit breaker the oil is used
A)
to act as circuit breaking medium only done
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B)
for circuit breaking and providing insulation done
clear
C)
for providing insulation only done
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D)
for none of the above purposes done
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question_answer2)
Series capacitor is used in a transmission line to
A)
compensate the voltage drp done
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B)
reduce line loss done
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C)
limit short circuit current done
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D)
improve load power factor done
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question_answer3)
Corona loss in a transmission line is dependent on
A)
diameter of the conductor done
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B)
material of the conductor done
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C)
height of the conductor done
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D)
none of these done
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question_answer4)
A fault is more severe from the view point of RRRV if it is a
A)
Short length fault done
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B)
Medium length line fault done
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C)
Long length line fault done
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D)
None of these done
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question_answer5)
Skin effect in conductor is proportional to
A)
\[{{(diameter\,\,of\,\,conductor)}^{1/2}}\] done
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B)
diameter of conductor done
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C)
\[{{(diameter\,\,of\,\,conductor)}^{2}}\] done
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D)
\[{{(diameter\,\,of\,\,conductor)}^{4}}\] done
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question_answer6)
For constant voltage transmission, the voltage drop along the line is maintained constant by installing
A)
capacitors done
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B)
inductors done
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C)
resistors done
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D)
synchronous phase modifiers at the receiving end done
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question_answer7)
Neutral earthling is provided for
A)
the safety of personnel from electric shock done
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B)
reducing the vulgate stress on lines and equipment with respect to earth under various operating and Ault conditions done
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C)
controlling the earth fault currents for protective relaying done
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D)
both [b] and [c] done
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question_answer8)
In which of the following cases are delay fuses used?
A)
For the protection of light circuits done
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B)
For the protection of power out-let circuits done
clear
C)
For the protection of fluorescent lamps done
clear
D)
Tor the protection of motors done
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question_answer9)
Different types of insulators used for transmission lines are
A)
pin type only done
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B)
suspension type only done
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C)
strain type only done
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D)
pin type, suspension type and shackle type done
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question_answer10)
The function of steel wire in an ACSR conductor is to
A)
compensate for skin effect done
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B)
take care of surges done
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C)
provide additional mechanical strength done
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D)
reduce inductance done
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question_answer11)
AC network analyzer is employed for solving the problems of
A)
load flow done
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B)
load flow and stability done
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C)
load flow and short circuit done
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D)
load flow, stability and short-circuit done
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question_answer12)
Which of the following method or techniques can be used for the measurement of high [d] [c] voltages?
A)
Generating voltmeter done
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B)
Electrostatic voltmeter done
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C)
Peak voltmeter done
clear
D)
Half effect generators done
clear
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question_answer13)
If two synchronous generators connected in parallel loose synchronism, it will lead to
A)
stalling of generators done
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B)
wild fluctuations in current done
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C)
wild fluctuations in current and voltage done
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D)
None of these done
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question_answer14)
The insulation of the modem EHV lines is designed based on
A)
corona done
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B)
switching voltage done
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C)
lightening voltage done
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D)
all of these done
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question_answer15)
In a transformer, the exciting current will be in phase quadrature with the impressed voltage provided?
A)
only the leakage impedance drop is ignored done
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B)
only the core loss is ignored done
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C)
both the leakage impedance drop and the core loss are ignored done
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D)
only the no-load copper loss is ignored done
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question_answer16)
The voltage measurements using uniform spark gap are
A)
affected by dust particles done
clear
B)
affected by polarity of supply done
clear
C)
affected by temperature done
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D)
none of these done
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question_answer17)
The change in excitation in an alternator connected to an infinite line provides a corresponding change in
A)
terminal voltage done
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B)
speed of rotor done
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C)
power generated done
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D)
power factor done
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question_answer18)
The function of Lightning arrester is
A)
to limiting the short-circuit fault current done
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B)
to provide path to high voltage surge to earth done
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C)
to reduce arcing done
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D)
none of these done
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question_answer19)
The conductor connecting consumer's terminals to the distributor is called the
A)
feeder done
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B)
distributor done
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C)
service main done
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D)
none of the above done
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question_answer20)
In order to improve the voltage profile of the line compensation is resorted by providing
A)
capacitors at the receiving end done
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B)
reactors at the receiving end done
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C)
resistors at the receiving end done
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D)
none of these done
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question_answer21)
The ripple voltage in dc output is small if
A)
frequency of supply voltage is small done
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B)
the filtering capacitor is small done
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C)
load current is small done
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D)
none of these done
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question_answer22)
A differential relay responds to
A)
algebraic difference of two or more similar electrical quantities done
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B)
vector difference of two or more similar electrical quantities done
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C)
algebraic difference between two currents done
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D)
algebraic difference between two voltages done
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question_answer23)
In case of Impulse Thermal break down of solid insulating materials, the critical electric field is proportional to
A)
critical absolute temperature done
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B)
square of critical absolute temperature done
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C)
square of Ty done
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D)
none of these done
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question_answer24)
A booster is connected in
A)
series with the feeder done
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B)
parallel with the feeder done
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C)
both [a] and [b] are correct done
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D)
none of these done
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question_answer25)
Which of the following techniques is used for the measurements of [a] [c] high frequency voltages?
A)
Peak voltmeter done
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B)
Series resistance micro-ammeter done
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C)
Resistance potential divider done
clear
D)
All of these done
clear
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question_answer26)
The power transmitted will be maximum when
A)
line reactance is high done
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B)
corona losses are minimum done
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C)
sending end voltage is more done
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D)
receiving end voltage is more done
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question_answer27)
Surge impedance of a transmission line is
A)
independent of its length done
clear
B)
dependent of its length done
clear
C)
independent on its temperature done
clear
D)
none of the above done
clear
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question_answer28)
Which fault gives rise to symmetrical fault currents?
A)
Single line to ground fault done
clear
B)
line to line fault done
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C)
Double line to ground fault done
clear
D)
Three phase fault done
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question_answer29)
High voltage Schring bridge is used to measure
A)
large capacitance without additional element done
clear
B)
small capacitance without additional element done
clear
C)
medium value capacitance done
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D)
None of these done
clear
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question_answer30)
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 done
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B)
power frequency and impulse voltage done
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C)
all kinds of voltages done
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D)
none of these done
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question_answer31)
The passive element that is used as interconnecting element for the stable operation of interconnected system is
A)
reactor done
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B)
resistor done
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C)
capacitor done
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D)
resistor and capacitor done
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question_answer32)
The sage of a transmission line is least affected owing to
A)
weight of the conductor done
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B)
current through the conductor done
clear
C)
atmospheric temperature done
clear
D)
ice deposited on the conductor done
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question_answer33)
The conductor carries more current on the surface in comparison to its core. This phenomenon is called the
A)
Skin effect done
clear
B)
Corona done
clear
C)
Ferranti effect done
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D)
Lenz's effect done
clear
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question_answer34)
Draw-in-system of laying underground cables has the drawback (s) of
A)
higher cost done
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B)
reduced current carrying capacity of the cables done
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C)
requirements of much deeper and wider trenches done
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D)
All of the above done
clear
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question_answer35)
By transmitting power at high voltage
A)
it will give poor voltage regulation done
clear
B)
it will give better voltage regulation done
clear
C)
it will not effect voltage regulation done
clear
D)
None of these done
clear
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question_answer36)
Use of additional shunt capacitor can be made for increasing the capability of line as it
A)
reduces surge impedance \[{{Z}_{0}}\] done
clear
B)
increases phase shift \[\beta \] done
clear
C)
increase in \[\alpha \] done
clear
D)
all of the above done
clear
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question_answer37)
Fuses have got advantages of
A)
cheapest type of protection done
clear
B)
inverse time-current characteristic done
clear
C)
no maintenance done
clear
D)
current limiting effect under short-circuit conditions done
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E)
all of the above done
clear
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question_answer38)
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 done
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B)
0.375 done
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C)
1.33 done
clear
D)
None of these done
clear
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question_answer39)
Which statement about the daily load curve is valid?
A)
The area under the curve gives the average demand. done
clear
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. done
clear
C)
The peak of the curve gives the installed capacity of the plant done
clear
D)
The area of the curves divided by the number of hours gives load factor. done
clear
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question_answer40)
Resistance witching is normally resorted in case of
A)
Air blast CB done
clear
B)
Bulk oil CB done
clear
C)
Minimum oil CB done
clear
D)
All types of CBs. done
clear
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question_answer41)
What is the main disadvantage of phase advancers?
A)
Cannot be used for motors below 200 H.P done
clear
B)
Produces noise done
clear
C)
Can be used where synchronous motor is un admissible done
clear
D)
None of these done
clear
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question_answer42)
What is the advantage of the static capacitors?
A)
Low losses done
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B)
Easy installation done
clear
C)
Lower maintenance done
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D)
All of the above done
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question_answer43)
Power factor can be improved by connecting which among these?
A)
Static capacitors. done
clear
B)
Resistors. done
clear
C)
Synchronous condensers. done
clear
D)
Both [a] and [c]. done
clear
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question_answer44)
Lower power factor is usually not due to ____.
A)
Discharge lamp done
clear
B)
Arc lamps done
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C)
Incandescent lamps done
clear
D)
Induction furnace. done
clear
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question_answer45)
What is maximum value of power factor?
A)
0.5 done
clear
B)
1 done
clear
C)
1.5 done
clear
D)
0.95 done
clear
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question_answer46)
What is the power factor tariff?
A)
It considers only maximum demand. done
clear
B)
It considers only semi fixed charges and the power factor. done
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C)
It considers only power factor. done
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D)
It considers the load factor. done
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question_answer47)
Which tariff is most ideal tariff for the consumer?
A)
Two part tariff done
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B)
Three part tariff done
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C)
Both [a] and [b] done
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D)
None of the above done
clear
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question_answer48)
What is tariff?
A)
The rate at which electrical energy is produced in the plant. done
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B)
The rate at which electrical energy is supplied to the consumers. done
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C)
Both [a] and [b]. done
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D)
None of these. done
clear
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question_answer49)
What are fixed charges?
A)
Cost of investment irrespective of energy generated. done
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B)
Operating cost of the fuel along with cost of investment plant. done
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C)
Operating cost only. done
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D)
None of the above done
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question_answer50)
Annual operating cost of a generating plant consists of
A)
Fixed charges done
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B)
Semi fixed charges done
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C)
Operating or running charges done
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D)
All of these done
clear
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