DGVCL Exam Paper (11-12-2011)
In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

Reluctance motor
Induction motor
Synchronous motor
Universal motor

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 iron loss
Low copper loss

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
Due to skin effect

Uniform current flows through the conductor
Portion of the conductor near the surface carries less current and the core of the conductor carries more current
Current flows through the half cross section of the conductor
Portion of the conductor near the surface carries more current and the core of the conductor carries less current

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
The purpose of skewing of rotor slots in an induction motor is

To reduce the locking tendency of the rotor
To increase the distributuion factor
To increase the breadth factor
To reduce the magnetic hum of the motor

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