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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-Distribution

Objective Type Question or MCQ of Power Generation page-8

71. Advantage of computer control of generating unit is that

a) All the units will be equally loaded
b) Feedback is easy
c) VAR output of units decreased
d) Loading of the units are adjusted t equal incremental fuel costs

Ans: (d)

72. Equal area criterion is used to find

a) Saluting of swing equation
b) Critical reclosure time
c) Change in frequency errors
d) Change in velocity errors

Ans: (b)

73. Phase shift between sending and receiving ends is determined by

a) Operating voltage
b) Reactance of the lines
c) Cross-section of conductor
d) None of these

Ans: (b)

74. Equal area criterion is applicable for only

a) Single machines and infinite bus
b) Two machines and infinite bus
c) Three machines and infinite bus
d) Four machines and infinite bus

Ans: (a)

75. If field current is increased by 25% above rated value and load is kept constant on an alternator,

a) It may go out of synchronism
b) Speed will cross the rated speed
c) It will burn
d) It will stop instantaneously

Ans: (a)

76. Steady state stability mean

a) A constant power is flowing
b) Frequency is exactly 50 Hz
c) There is synchronism between machines and external tie lines
d) All of these

Ans: (c)

77. In interconnection if hydro and thermal plant, hydro-generation is increased by

a) Increasing load on the plant
b) Decreasing load on the plant
c) Keeping load on the plant constant
d) None of these

Ans: (a)

78. If torque angle increases infinitely, the system will show

a) Stability
b) Instability
c) Steady state stability
d) None of these

Ans: (b)

79. Accumulated time error in power system can be corrected by

a) Increasing generation
b) Decreasing generation
c) Coordinating with other interconnected systems
d) None of these

Ans: (c)

80. Transient stability depends on

a) Fault clearing time
b) Strength of transmitting network
c) Short circuit ratio of generating unit
d) All of these

Ans: (d)

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