Computer Programming MCQs

5739 MCQs  (Page 200 of 574)

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
For which of the following ratings of the transformer differential protection is recommended ?
A. above 30 kva.
B. equal to and above 5 mva
C. equal to and above 25 mva
D. none of the above
relay is preferred for phase fault on short transmission line?
A. induction type
B. reactance
C. impedance
D. none of the above
relays are used for phase faults on long line?
A. impedance
B. reactance
C. either of the above
D. none of the above
Distance relays are generally_____________?
A. split-phase relays
B. reactance relays
C. impedance relays
D. none of the above
transmission line has reflection coefficient as one?
A. open circuit
B. short-circuit
E. long
D. none of the above
The inductive interference between power and communication line can be minimized by__________?
A. transposition of the power line
B. transposition of the communication line
C. both (a) and (b)
D. increasing the distance between the conductors