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SSC JE EE Quiz: Electrical Machine Booster Quiz-13

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Question 1

A 6 pole induction motor is supplied by 8-pole alternator. If alternator speed is 750 rpm, then for 0.025 slip, actual motor speed in rpm is

Question 2

Non-loading heat run test on transformers is performed by means of –

Question 3

The resultant flux density in the air gap of synchronous generator is lowest during:

Question 4

Consider the alternator running in parallel. Now if the excitation of one of the alternator is changed, then,

Question 5

The use of higher flux density in the transformer design —

Question 6

For a transformer we require

Question 7

In an induction motor, if air gap is reduced, then

Question 8

For a lap wound DC machine, armature resistance is 0.05Ω and number of poles are 8. Now armature is rewound but as a wave winding, then its armature resistance is __________Ω.

Question 9

Double cage induction motors are used for

Question 10

Why are transformers stamping annealed before being used for the building?

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