Temperature of the stator winding of a three phase induction motor is obtained by___________?

Related Mcqs:

In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be___________?

A. Ns B. s.N, C. (l-s)Ns D. (Ns-l)s...

It is advisable to avoid line-starting of induction motor and use starter because__________?

A. motor takes five to seven times its full load current B. it will pick-up very high speed and may go out of step C. it will run in reverse direction D. starting torque is very high...

The ‘crawling” in an induction motor is caused by___________?

A. high loads B. low voltage supply C. improper design of machine D. harmonics developed in the motor...

The starting torque of a 3-phase squirrel cage induction motor is____________?

A. twice the full load torque B. 1.5 times the full load torque C. equal to full load torque...

The torque of a rotor in an induction motor under running condition is maximum__________?

A. at the unit value of slip B. at the zero value of slip C. at the value of the slip which makes rotor reactance per phase equal to the resistance per phase D. at the value of the slip which makes the rotor reactance half of the rotor...