Electrical Machines
Cogging and crawling are phenomena associated with

 cage induction machines and they are essentially the same.
 the former at a fraction of its rate speed and the latter during starting.
 the former during starting and the latter at a fraction of its rated speed.
 any of the above.

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Electrical Machines
In case of a DC Shunt motor if the load is decreased to some extent, what will happen to its speed?

 The speed will increase in proportion to reduction in load.
 The speed will increase gradually.
 The speed will increase abruptly.
 The speed will remains almost constant.

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Electrical Machines
A DC shunt generator builds up to a voltage of 220 V at no load while running at its rated speed. If the speed of the generator is raised by 25% kepping the circuit conditions unaltered, then the Voltage to which the machine would build up will

 increase to 1.25 times 220 V
 not change and remain at 220 V
 increase to a value greater than 1.25 times 220 V
 increase to value lying between 220 V and 1.25 times 220 V

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