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

Polyphase Induction Motors 05/05/2021

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

Related Mcqs:

    In medium sized induction motors, the slip is generally around___________?
    A. 0.04% B. 0.4% C. 4% D. 14%...
    The torque developed in the cage induction motor with autostarter is___________?
    A. k/torque with direct switching B. K x torque with direct switching C. K2 x torque with direct switching D. k2/torque with direct switching...
    If an induction motor with certain ratio of rotor to stator slots, runs at 1/7 of the normal speed, the phenomenon will be termed as____________?
    A. humming B. hunting C. crawling D. cogging...
    The stating torque of the slip ring induction motor can be increased by adding__________?
    A. external inductance to the rotor B. external resistance to the rotor C. external capacitance to the rotor D. both resistance and inductance to rotor...
    In induction motor, percentage slip depends on__________?
    A. supply frequency B. supply voltage C. copper losses in motor D. none of the above...

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