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Environmental Factors MCQ Questions & Answers

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




Question 1

1 Btu/h is equal to ___________

A. 0.641
B. 0.334
C. 0.293
D. 0.417

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Question 2

Calculate the compensator rating required for a sec(?)=1.

A. 0.64 P.U
B. 0.21 P.U
C. 0.57 P.U
D. 0 P.U

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Question 3

Calculate the heat loss in the electric motor for time interval 0-5 sec using the following data: Ia=2 A, Ra=.8?.

A. 16 J-sec
B. 14 J-sec
C. 12 J-sec
D. 10 J-sec

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Question 4

Calculate the value of THD if the distortion factor is .8.

A. 76 %
B. 75 %
C. 74 %
D. 73 %

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Question 5

Calculate the value of Voltage ripple factor if the Form factor is 1.1.

A. 45.8 %
B. 46.2 %
C. 47.5 %
D. 49.9 %

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Question 6

Electric motors are placed in __________ to protect them from dust and contamination.

A. Enclosures
B. Open environment
C. Moisturizing environment
D. Hot environment

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Question 7

Full form of THD is ____________

A. Total harmonic diverter
B. Total harmonic digital
C. Total harmonic distortion
D. Total harmonic discrete

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Question 8

Full form of VRF.

A. Voltage ripple factor
B. Voltage revert factor
C. Volume ripple factor
D. Volume revert factor

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Question 9

Overloading can be prevented using _____________

A. Over-current protection
B. Speed protection
C. Over frequency protection
D. Oversize protection

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Question 10

Second lowest order harmonic present in 3-? fully controlled rectifier is __________

A. 5th
B. 7th
C. 3rd
D. 2nd

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Question 11

The most common cause of motor failure is ____________

A. Overloading
B. Low resistance
C. Contamination
D. Over-Heating

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Question 12

What is the range of size of the motor (kW) for efficiency nearly equals to 90%?

A. 15-150
B. 0-2
C. Mar-15
D. 150-250

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Question 13

Which test is used to determine the conditions where electric motors are being used?

A. Thermography
B. Geography
C. Seismography
D. Anthropology

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Question 14

Calculate the compensator rating required for a sec(Φ)=1.

A. 0.64 P.U
B. 0.21 P.U
C. 0.57 P.U
D. 0 P.U

View Answer

Question 15

Calculate the heat loss in the electric motor for time interval 0-5 sec using the following data: Ia=2 A, Ra=.8Ω.

A. 16 J-sec
B. 14 J-sec
C. 12 J-sec
D. 10 J-sec

View Answer

Question 16

Calculate the value of THD if the distortion factor is .8.

A. 76%
B. 75%
C. 74%
D. 73%

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Question 17

Calculate the value of Voltage ripple factor if the Form factor is 1.1.

A. 45.80%
B. 46.20%
C. 47.50%
D. 49.90%

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Question 18

Second lowest order harmonic present in 3-Φ fully controlled rectifier is __________

A. 5th
B. 7th
C. 3rd
D. 2nd

View Answer