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page-19  Multiple Choice Question (MCQ) of Measurements page-18  Multiple Choice Question (MCQ) of Measurements page-17  Multiple Choice Question (MCQ) of Measurements page-16  Multiple Choice Question (MCQ) of Measurements page-15  Multiple Choice Question (MCQ) of Measurements page-14  Multiple Choice Question (MCQ) of Measurements page-13  Multiple Choice Question (MCQ) of Measurements page-12  Multiple Choice Question (MCQ) of Measurements page-11  Multiple Choice Question (MCQ) of Measurements page-10  Multiple Choice Question (MCQ) of Measurements page-9  Multiple Choice Question (MCQ) of Measurements page-8  Multiple Choice Question (MCQ) of Measurements page-7  Multiple Choice Question (MCQ) of Measurements page-6  Multiple Choice Question (MCQ) of Measurements page-5  Multiple Choice Question (MCQ) of Measurements page-4  Multiple Choice Question (MCQ) of Measurements page-3  Multiple Choice Question (MCQ) of Measurements page-2  Multiple Choice Question (MCQ) of Measurements 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Machines page-10  Multiple Choice Question (MCQ) of D.C. Machines page-9  Multiple Choice Question (MCQ) of D.C. Machines page-8  Multiple Choice Question (MCQ) of D.C. Machines page-7  Multiple Choice Question (MCQ) of D.C. Machines page-6  Multiple Choice Question (MCQ) of D.C. Machines page-5  Multiple Choice Question (MCQ) of D.C. Machines page-4  Multiple Choice Question (MCQ) of D.C. Machines page-3  Multiple Choice Question (MCQ) of D.C. Machines page-2  Multiple Choice Question (MCQ) of D.C. Machines page-1  MCQ of D.C generators page-11  MCQ of D.C generators page-10  MCQ of D.C generators page-9  MCQ of D.C generators page-8  MCQ of D.C generators page-7  MCQ of D.C generators page-6  MCQ of D.C generators page-5

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-generators

Objective Type Question or MCQ of Transmission and Distribution page-14

131. Which of the following system is preferred for good efficiency and high economy in distribution system?

a) Single phase system
b) 2 phase 3 wire system
c) 3 phase 3 wire system
d) 3 phase 4 wire system

Ans: (c)

132. For a 400 kV transmission line, the switching overvoltage crest in kV is

a) 400
b) 400√2
c) 825
d) 1155

Ans: (d)

133. Breakdown of insulation of a cable can be avoided economically by the use of

a) Insulating material with different dielectric
b) Intersheath
c) Both (a) and (b) above
d) None of these

Ans: (c)

134. Two transmission line each having surge impedance of 75Ω are separated by cable link. For zero reflection, the surge impedance of the cable should be

a) 0Ω
b) 75Ω
c) 150Ω
d) 300Ω

Ans: (b)

135. For most reliable distribution supply, the configuration used is

a) Radial main
b) Ring main
c) Parabolic main
d) Balancing main

Ans: (b)

136. ACSR is used for transmission of power in preference to copper conductors because

a) It is lighter
b) It is more economical
c) It has higher current carrying capacity
d) It can stand higher surge voltages

Ans: (b)

137. The peak short circuit current equals

a) √2 ac component
b) 1.8 ×√2 ac component
c) √3 ×√2 ac component
d) 2 ×√2 ac component

Ans: (b)

138. Bundled conductors are used to

a) Reduce radio interference
b) Reduce reactance
c) Both (a) and (b)
d) None of these

Ans: (b)

139. Due to skin effect, resistance of the conductor

a) Decreases
b) Increases
c) Remains same
d) Uncertain

Ans: (b)

140. In a short line

a) Shunting effects are neglected
b) Shunting effects are included
c) May include or neglect
d) None of these

Ans: (a)

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