In split phase motor main winding is of

A 3-phase, 4-pole alternator has 48 stator slots carrying a 3-phase distributed winding. Each coil of the winding is short chorded by one slot pitch. The winding factor is given by ______________

A

(cos7.5)/16

B

(cot7.5)/8

C

1/(8sin7.5)

D

(cot7.5)/16

In a split phase motor, the running winding should have

A

high resistance and low inductance

B

low resistance and high inductance

C

high resistance as well as high inductance

D

low resistance as well as low inductiance

In split-phase motor auxiliary winding is of

A

thick wire placed at the bottom of the slots

B

thick wire placed at the top of the slots

C

thin wire placed at the top of the slots

D

thin wire placed at the bottom of the slots

When is the starting winding cut out of the circuit in the split phase motor?

A

when the motor speed reaches 65 % of the full load speed

B

when the motor speed reaches 75 % of the full load speed

C

when the motor speed reaches 50 % of the full load speed

D

when the motor speed reaches 85 % of the full load speed

Which winding is mostly used winding in the single phase induction motor?

A

circular winding

B

concentric winding

C

progressive winding

D

skein winding

The armature winding of a 2-pole, 3-phase alternator for each phase is distributed in a number of slots per phase. The RMS value of the voltage per phase is less than the RMS value of the voltage per coil multiplied by the number of coils in series because the _________

A

RMS value of the voltage in different coils of the phase is different

B

equal RMS voltages in different coils of the phase has mutual phase difference

C

maximum value of the induced voltage in different coils of the phase are different

D

different coils of the phase pass through different saturated regions of the magnetic circuit

Given the entropy for a split, Esplit = 0.39 and the entropy before the split, Ebefore = 1. What is the Information Gain for the split?

A

1

B

0.39

C

0.61

D

2.56

Consider a single phase synchronous machine of cylindrical rotor type. A single phase supply is given to the stator winding and a voltmeter is connected across rotor winding. For what value of θr, the voltmeter reads maximum?

A

90°

B

0°

C

45°

D

30°

Consider a single phase synchronous machine of cylindrical rotor type. A single phase supply is given to the stator winding, and a voltmeter is connected across rotor winding. For what value of θr the voltmeter reads a zero?

A

0°

B

30°

C

45°

D

90°

If Xl is leakage reactance, Xf is reactance due to field winding, Xdw is reactance due to damper winding and Xa is armature winding reactance then reactance of synchronous generator in subtransient state is due to which of the following?

A

Xl ,Xdw and Xa

B

Xl and Xa

C

Xl , Xf ,Xdw and Xa

D

Xl and Xdw

In split phase motor main winding is of

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