-In DOL (Direct online) starter, start button is an integral part of the overload relay.
True or false? reason?


-When the motor is running and if the supply to the Contactor coil fails, then motor will
stop. True or false?reason?

-Electrical contactors are designed for high switching frequency, long life and short
switching times. True or false? reason?

-High inrush currents during starting can be reduced by employing reduced voltage
starting methods. True or false? reanson?

-Which type of protection is provided for electrical motor against over heating? reason?

 

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To get help with homework you nee to show your best effort at answering the questions. We won’t answer them for you, only help you to understand the thing the question is about so you can answer them yourself.

 

I suggest you get hold of some suitable documentation that shows motor control circuits, if you do not have already.
One source may be the NFPA79 which is out there in PDF.