A. compensate for line inductive reactance
B. compensate for line capacitive reactance
C. improve line voltage
D. none of the above
Related Mcqs:
- Series reactors should have________________?
A. low resistance
B. high resistance
C. low impedance
D. high impedance - Thermal circuit breaker has____________?
A. delayed trip action
B. instantaneous trip action
C. both of the above
D. none of the above - Circuit breakers are essentially____________?
A. current carrying contacts called electrodes
B. arc extinguishers
C. circuits to break the system
D. transformers to isolate the two systems
E. any of the above - The current zero interruption, in oil and air blast circuit breakers, is achieved by_______________?
A. lengthening of the gap
B. cooling and blast effect
C. both A. and B
D. deionizing the oil with forced air
E. none of the above - Overheating of relay contacts or contact born out is due to_______________?
A. slow making and breaking of load circuit contacts
B. foreign matter on the contact surface
C. too low contact pressure
D. all of the above - H.R.C. fuses provide best protection against________________?
A. overload
B. reverse current
C. open-circuits
D. short-circuits - The under voltage relay can be used for______________?
A. generators
B. busbars
C. transformers
D. motors
E. all of the above - Over voltage protection is recommended for______________?
A. hydro-electric generators
B. steam turbine generators
C. gas turbine generators
D. all of the above
E. none of the above - In a single bus-bar system there will be complete shut down when____________?
A. fault occurs on the bus itself
B. fault occurs on neutral line
C. two or more faults occur simultaneously
D. fault occurs with respect to earthing - The fuse rating is expressed in terms of_____________?
A. current
B. voltage
C. VAR
D. kVA
