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Slip Energy Recovery MCQ Questions & Answers

Slip Energy Recovery MCQs : This section focuses on the "Slip Energy Recovery". These Multiple Choice Questions (MCQs) should be practiced to improve the Slip Energy Recovery skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

A 2-pole, 3-phase, ______ Hz induction motor is operating at a speed of 550 rpm. The frequency of the rotor current of the motor in Hz is 2.

A. 9.98
B. 9.71
C. 9.12
D. 9.37

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Question 2

At low values of slip, the electromagnetic torque is directly proportional to ___________

A. s
B. s2
C. s3
D. s4

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Question 3

Calculate the average value of the sinusoidal waveform x(t)=848sin(1.65?t+2?÷0.68).

A. 0
B. 78 V
C. 15 V
D. 85 V

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Question 4

Calculate the time period of the waveform v(t)=12sin(8?t+8?÷15)+144sin(2?t+?÷6)+ 445sin(?t+7?÷6).

A. 8 sec
B. 4 sec
C. 7 sec
D. 3 sec

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Question 5

Calculate the total heat dissipated in a resistor of 44 ? when 0 A current flows through it.

A. 0 W
B. 2 W
C. 1.5 W
D. .3 W

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Question 6

If induction motor air gap power is 1.8 KW and gross developed power is .1 KW, then rotor ohmic loss will be _________ KW.

A. 1.7
B. 2.7
C. 3.7
D. 4.7

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Question 7

In the rotor voltage injection method, when an external voltage source is in opposite phase with the main voltage then speed will ___________

A. Increase
B. Decrease
C. Remain unchanged
D. First increases then decrease

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Question 8

In the rotor voltage injection method, when an external voltage source is in phase with the main voltage then speed will ___________

A. Increase
B. Decrease
C. Remain unchanged
D. First increases then decrease

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Question 9

The power factor of a squirrel cage induction motor is ___________

A. High at light load only
B. High at heavy loads only
C. Low at the light and heavy loads both
D. Low at rate load only

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Question 10

The rotor injection method is a part of the slip changing technique.

A. True
B. False

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Question 11

The slip recovery scheme is a part of the synchronous speed changing technique.

A. True
B. False

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Question 12

The slope of the V-I curve is 9.1°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.

A. .16 ?
B. .26 ?
C. .25 ?
D. .44 ?

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Question 13

The value of slip at which maximum torque occurs ________

A. R2÷X2
B. 4R2÷X2
C. 2R2÷X2
D. R2÷3X2

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Question 14

Calculate the average value of the sinusoidal waveform x(t)=848sin(1.65πt+2π÷0.68).

A. 0
B. 78 V
C. 15 V
D. 85 V

View Answer

Question 15

Calculate the time period of the waveform v(t)=12sin(8πt+8π÷15)+144sin(2πt+π÷6)+ 445sin(πt+7π÷6).

A. 8 sec
B. 4 sec
C. 7 sec
D. 3 sec

View Answer

Question 16

Calculate the total heat dissipated in a resistor of 44 Ω when 0 A current flows through it.

A. 0 W
B. 2 W
C. 1.5 W
D. .3 W

View Answer

Question 17

The slope of the V-I curve is 9.1°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.

A. .16 Ω
B. .26 Ω
C. .25 Ω
D. .44 Ω

View Answer