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 ________________
- 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 ___________
- 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 _____________
- 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