Polyphase Induction Motors Mcqs Start Creating PDF
Polyphase Induction Motors Mcqs, this topic has 101 mcqs, It takes five to ten minutes to complete this free polyphase induction motors mcqs test. You will see 4 or 5 option of each question. You must choose / think only one option and then press on answer key for check right answer. Practice "polyphase induction motors mcqs" MCQs and share with your friends, brothers, sisters.
polyphase induction motors mcqs (Total Quiz: 101)
MCQ: The frame of an induction motor is usually made of____________?
- silicon steel
- cast iron
MCQ: The torque of an induction motor is___________?
- directly proportional to slip
- inversely proportional to slip
- proportional to the square of the slip
- none of the above
MCQ: The shaft of an induction motor is made of_____________?
- high speed steel
- stainless steel
- carbon steel
- cast iron
MCQ: In an induction motor, no-load the slip is generally____________?
- less than 1%
MCQ: In case the air gap in an induction motor is increased?
- the magnetising current of the rotor will decrease
- the power factor will decrease
- speed of motor will increase
- the windage losses will increase
MCQ: A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor e.m.f. will be____________?
- 200 Hz
- 50 Hz
- 2 Hz
- 0.2 Hz
MCQ: The efficiency of an induction motor can be expected to be nearly____________?
- 60 to 90%
- 80 to 90%
- 95 to 98%
MCQ: The number of slip rings on a squirrel cage induction motor is usually____________?
MCQ: The term ‘cogging’ is associated with___________?
- three phase transformers
- compound generators
- D.C. series motors
- induction motors
MCQ: An induction motor with 1000 r.p.m. speed will have____________?
- 8 poles
- 6 poles
- 4 poles
- 2 poles
- polyphase induction motors
- polyphase motors
- polyphase induction machine
- polyphase ac motor