Index

SymbolsTransformerRelayPower-SystemBasic-electricalACSR-ConductorCircuit-BreakerInterview-questions-of-Basic-ElectricityInterview-questions-of-transformerInsulatorCurrent-TransformerMCQMCQ-powersystemThermal-power-stationInterview-questions-of-Power-SystemPower-ElectronicsInterview-questions-of-Underground-CableInterview-questions-of-IlluminationIlluminationMCQ-of-ElectronicsMCQ-of-Basic-ElectricalMCQ-of-Transformers MCQ-of-D.C-motor MCQ-of-D.C-generatorsMCQ-Control-SystemMCQ-Measurementsmcq-of-Generation-power-systemMCQ-of-Induction-MotorMCQ-of-Transmission-DistributionMCQ-of-Electrical-MachinesMCQ-of-Alternator-and-Synchronous-MotorsMCQ-Electric-PowerMCQ-Illumination

Objective Type Question or MCQ of Power System Protection page-7


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61. Which of the following carrier frequency is used in a carrier current protection scheme?

a) 500 kHz to 5 kHz
b) 5 kHz to 50 kHz
c) 50 kHz to 500 kHz
d) 500 kHz to 5 kHz

Ans: (a)

62. No moving parts are required in

a) MHD generator
b) Tidal power plant
c) Thermioic conversion
d) OTEC power plant

Ans: (c)

63. Power system insulation problem involves

a) Selection of “basic insulation level” insulation level of system equipment and lightning arrestor
b) Determination of line insulation
c) Capacitance of earth and subsequent grounding
d) Both (a) and (b)

Ans: (a)

64. A fast breeder reactor

a) Operates with slow neutrons and produces more fissionable material than it consumes
b) Operates with slow neutrons and produces less fissionable material than it consumes
c) Operates with fast neutrons and produces more fissionable material than it consumes
d) Operates with fast neutrons and produces less fissionable material than it consumes

Ans: (c)

65. Typical gap length of rod type surge diverter used for 132 kV line is

a) 10 cm
b) 20 cm
c) 35 cm
d) 65 cm

Ans: (c)

66. Gas turbines can be brought to the bus bar from cold in about

a) 2 minutes
b) 30 minutes
c) 1 hour
d) 2 hour

Ans: (a)

67. A gas turbine works on

a) Carnot cycle
b) Dual cycle
c) Brayton cycle
d) Rankine cycle

Ans: (c)

68. Out of the following which one is not a unconventional source of energy?

a) Tidal power
b) Nuclear energy
c) Geothermal energy
d) Wind power

Ans: (b)

69. Maximum efficiency of an open cycle gas turbine is nearly

a) 30%
b) 40%
c) 50%
d) 60%

Ans: (a)

70. A 100 MW thermal power plant will consume nearly how many tones of coal in one hour?

a) 50 tonnes
b) 150 tonnes
c) 1500 tonnes
d) 15,000 tonnes

Ans: (a)


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Multiple Choice Question (MCQ) of Transmission and Distribution page-3:
21. ACSR conductor implies
A) Anodized Core Smooth Run
B) Anode current sinusoidally run
C) Aluminium conductor steel reinforced
D) All conductors surface treated and realigned.

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Multiple Choice Question (MCQ) of Transmission and Distribution page-2:
11. In overhead transmission lines the effect of capacitance can be neglected when the length of line is less than
A) 80 km
B) 100 km
C) 160 km
D) 200 km.

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