20) The starting torque of a squirrel cage induction motor is low because of :
Answer is:
high starting current, high starting P.F.
Related Polyphase Induction Motors MCQ - Electrician (Set-1) with Answers
Answer is:
Burn out
22) On switching 'ON' the starter, the magnetic contractor vibrates heavily. The possible cause is :
Answer is:
low voltage and dirt between the contacts
Answer is: