Computer Programming MCQs

5739 MCQs  (Page 198 of 574)

To reduce short circuit fault currents are used_____________?
A. reactors
B. resistors
C. capacitors
D. none of the above
A.C. network analyser is used to solve problems of_______________?
A. load flow
B. load flow and short-circuit
C. load flow and stability
D. load flow, short-circuit and stability
Short-circuit currents are due to_______________?
A. single phase to ground faults
B. phase to phase faults
C. two phase to ground faults
D. three phase faults
Which of the following statements is incorrect ?
A. lightning arrestors are used before the switchgear
B. shunt reactors are used as compensation reactors
C. the peak short current is (1.8 xv2) times the a.c. component
D. the mva at fault is equal to base mva divided by per unit equivalent fault reactance
Bus coupler is very essential in arrangement______________?
A. single bus
B. double bus, double breaker
C. main and transfer bus
D. all of the above