Q.1
For an ac three-phase four wire system, having a voltage of 415V, with load ofkW and resistance of 0.at power factor of 0.The incurred copper losses of the system is ____
  • a) 4.955 kW
  • b) 47 kW
  • c) 49 kW
  • d) 7.9 kW
Q.2
Distributors fed at both ends has an advantage of ________________
Questionpower-systems-questions-answers2.jpg
  • a) continuous supply
  • b) fault isolation
  • c) being economical
  • d) all of the mentioned
Q.3
Power factor is higher
  • a) 2
  • b) 1,2
  • c) 1,2,3
  • d) 2,3
Q.4
The distribution feeding system of ring main system has ______________
  • a) one feeder
  • b) 2 feeders
  • c) 4 feeders
  • d) cannot be said
Q.5
A substation records a dip in the voltage received by 15%. To overcome this issue, the booster employed at the substation is ___________
Questionpower-systems-questions-answers5.jpg
  • a) a series wound generator coupled to dc shunt motor
  • b) a series wound motor
  • c) a shunt motor operating at lagging power factor
  • d) a shunt motor coupled to differential motor
Q.6
A substation records a dip in the voltage received by 15%. To overcome this issue, the booster employed at the substation which should have a _____________
Questionpower-systems-questions-answers6.jpg
  • a) low voltage and high current generator
  • b) high voltage and low current generator
  • c) medium voltage but high current generator
  • d) any of the mentioned
Q.7
Single core cables for an ac systems are not provided with armouring.
  • a) True
  • b) False
0 h : 0 m : 1 s