DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

All of these
Tripping fault current
Trapping power frequency waves
Trapping high frequency waves entering into generator/transformer unit.

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
Which of the following correctly represents the sequence of operations of isolator, circiut breaker and earthing switch while opening a circuit?

Open circuit breaker-open isolator-close earthing switch
Close circuit breaker-close isolator - open earthing switch
Close earthing switch - open ciruit- breaker-open islotor
Open isolator close circuit breaker-open earthing switch

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
DC series motors are best suited for traction work because

Its torque is proportional to the square of the armature current and speed is inversely proportional to torque
Torque and speed are proportional to the square of the armature current
Torque and speed are inversely proportional to the square of the armature current
Its torque is proportional to the square of the armature current and speed is directional proporational to torque

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
Distribution transformers have good all day efficiency due to

Low voltage
Low copper as well as iron loss
Low copper loss
Low iron loss

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP
MORE MCQ ON DGVCL Exam Paper (11-12-2011)