Mechanical Engineering - Thermodynamics

21. 

The value of one bar (in S. I. units) is equal to

A. 1 x 102 N/m2
B. 1 x 103 N/m2
C. 1 x 104 N/m2
D. 1 x 105 N/m2

Answer: Option D

Explanation:

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22. 

Petrol is distilled at

A. 65° to 220°C
B. 220° to 345°C
C. 345° to 470°C
D. 470° to 550°C

Answer: Option A

Explanation:

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23. 

If the carbon content in the bituminous coal is 78 to 81%, it is said to be coking bituminous coal.

A. Agree
B. Disagree

Answer: Option B

Explanation:

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24. 

The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)

A.
B.
C.
D.

Answer: Option C

Explanation:

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25. 

The mass of excess air supplied is equal to

A. x Mass of excess carbon
B. x Mass of excess oxygen
C. x Mass of excess carbon
D. x Mass of excess oxygen

Answer: Option D

Explanation:

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