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Heating Effects MCQ Questions & Answers

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




Question 1

A circuit consists of two 7 F capacitors connected in series and 12 H inductor. Determine the order of the circuit.

A. 1
B. 2
C. 0
D. 3

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Question 2

Calculate the heat absorbed by a 3 ? resistor when 6 V is applied across it.

A. 12 W
B. 10 W
C. 8 W
D. 11 W

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Question 3

Calculate the heating time constant of the machine if the thermal capacity (c) of the machine is 24 watts/? and heat dissipation constant value (D) is 3 watts/?.

A. 8 sec
B. 7 sec
C. 6 sec
D. 9 sec

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Question 4

Calculate the quality factor for the R-C circuit connected in the cooling system if R=1 ? and C=10 F.

A. 0.1
B. 0.2
C. 0.3
D. 0.4

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Question 5

Calculate the steady state temperature value for T(t)=1.5(1-e-17t).

A. 1.5
B. 4.8
C. 3.9
D. 2.4

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Question 6

Convert 20 ? into Fahrenheit.

A. 68 ?
B. 58 ?
C. 78 ?
D. 48 ?

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Question 7

Convert 50? into Celsius.

A. 20 ?
B. 10 ?
C. 30 ?
D. 40 ?

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Question 8

Cooling air travels 10 m distance in 5 sec from point A to point B. Calculate the velocity of the cooling air.

A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 10 m/s

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Question 9

Inadequate rating of the equipment can ___________

A. Increase the speed
B. Decrease the speed
C. Damage the winding
D. Increase the efficiency

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Question 10

Insufficient rating of the machine can damage the windings.

A. True
B. False

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Question 11

Iron losses occur in the machine are variable losses.

A. True
B. False

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Question 12

What is the unit of power?

A. Joule/sec
B. Joule/sec2
C. Joule/sec3
D. Joule/sec4

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Question 13

Which of the following are the classes of insulating material in electrical machines?

A. ?, A, E, F, H, C
B. ?, E, B, F, H, C
C. A, E, B, F, H, C
D. ?, A, E, F, C

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Question 14

Calculate the heat absorbed by a 3 Ω resistor when 6 V is applied across it.

A. 12 W
B. 10 W
C. 8 W
D. 11 W

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Question 15

Calculate the heating time constant of the machine if the thermal capacity (c) of the machine is 24 watts/℃ and heat dissipation constant value (D) is 3 watts/℃.

A. 8 sec
B. 7 sec
C. 6 sec
D. 9 sec

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Question 16

Calculate the quality factor for the R-C circuit connected in the cooling system if R=1 Ω and C=10 F.

A. 0.1
B. 0.2
C. 0.3
D. 0.4

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Question 17

Convert 20 ℃ into Fahrenheit.

A. 68 ℉
B. 58 ℉
C. 78 ℉
D. 48 ℉

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Question 18

Convert 50℉ into Celsius.

A. 20 ℃
B. 10 ℃
C. 30 ℃
D. 40 ℃

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Question 19

Which of the following are the classes of insulating material in electrical machines?

A. Γ, A, E, F, H, C
B. Γ, E, B, F, H, C
C. A, E, B, F, H, C
D. Γ, A, E, F, C

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