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
The relay with inverse time characteristic will operate within____________?
(A) 1.5 sec
(B) 5 to 10 sec
(C) 5 to 20 sec
(D) 20 to 30 sec
(D) none of the above
Which of the following devices will receive voltage surge first travelling on the transmission line ?
(A) Lightning arresters
(B) Relays
(C) Step-down transformer
(D) Switchgear
A _________ is used to measure the stator % winding temperature of the generator?
(A) thermocouple
(B) pyrometer
(C) resistance thermometer
(D) thermometer
Distance relays are generally_____________?
(A) split-phase relays
(B) reactance relays
(C) impedance relays
(D) none of the above
The torque produced in induction type relay (shaded pole structure) is_____________?
(A) inversely proportional to the current
(B) inversely proportional to the square of the current
(C) proportional to the current
(D) proportional to square of the current
Admittance relay is __________ relay?
(A) impedance
(B) directional
(C) non-directional
(D) none of the above
Air blast circuit breakers for 400 kV power system are designed to operate in_______________?
(A) 100 microsecond
(B) 50 millisecond
(C) 0.5 sec
(D) 0.1 sec
The fuse wire, in D.C. circuits, is inserted in____________?
(A) negative circuit only
(B) positive circuit only
(C) both (A) and (B)
(D) either (A) or (B)
A switchgear is device used for_____________?
(A) interrupting an electrical circuit
(B) switching an electrical circuit 111.
(C) switching and controlling an electrical circuit
(D) switching, controlling and protecting the electrical circuit and equipment