Computer Programming MCQs

5739 MCQs  (Page 199 of 574)

Series reactors should have________________?
A. low resistance
B. high resistance
C. low impedance
D. high impedance
The single phasing relays are used for the protection of_____________?
A. single phase motors only
B. two phase motors only
C. two single phase motors running in parallel
D. three phase motors
Arc in a circuit breaker is interrupted at___________?
A. zero current
B. maximum current
C. minimum voltage
D. maximum voltage
Over voltage protection is recommended for______________?
A. hydro-electric generators
B. steam turbine generators
C. gas turbine generators
D. all of the above
Which of the following circuit breakers has high reliability and minimum maintenance ?
A. air blast circuit breakers
B. circuit breaker with sf6 gas
C. vacuum circuit breakers
D. oil circuit breakers
The short circuit in any winding of the transformer is the result of______________?
A. mechanical vibration
B. insulation failure
C. loose connection
D. impulse voltage