AE-JE Foundation EE : Electrical Machines Quiz -9

Which of the following motor is non-self starting?

A salient-pole synchronous motor is operating 1/4 full load. If its field current is suddenly switched off, it would?

The V cures of a synchronous motor show the relationship between

The term Synchronous condenser refers to

A 440 V, 3-ϕ, 4 pole, 50 Hz synchronous motor delivers a power of ______watt, while delivering torque.

The function of damper windings in synchronous motors is

1. Prevent hunting

2. Reduce noise

3. Provides starting torque

4. Improves power factor.

For steady Torque production in synchronous machine.

The increased load demand in a synchronous motor is met by:

A synchronous motor operates at 0.8 p.f. lagging. If the field current of the motor is continuously increased.

Each of the next four (4) items consists of two statements, one labelled as ‘Statement (I)’ and the other as ‘Statement (II)’. You are to examine these two statements carefully and select the answers to these items using the code given below:

A) Both Statements (I) and Statement (II) are individually true and Statement (II) is correct explanation of statement (I).

B) Both Statements (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of statement (I).

C) Statement (I) is true but statement (II) is false.

D) Statement (I) is false but statement (II) is true.

Statement 1: Synchronous motor is doubly excited machine.

Statement 2: Speed of synchronous motor depends on load.