Mechanical Engineering - Thermodynamics

31. 

One kg of sulphur requires 1 kg of oxygen for complete combustion and produces 2 kg of sulphur dioxide.

A. True
B. False

Answer: Option A

Explanation:

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32. 

The change of entropy, when heat is absorbed by the gas, is

A. positive
B. negative
C. positive or negative

Answer: Option A

Explanation:

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33. 

A machine which violates the first law of thermodynamics is known as perpetual motion machine of the second kind.

A. Correct
B. Incorrect

Answer: Option B

Explanation:

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34. 

Both the Ericsson and Joule's cycle have two constant pressure processes.

A. True
B. False

Answer: Option A

Explanation:

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35. 

The general law for the expansion or compression of gases, is

A. pv = C
B. pv = m R T
C. pvn = C
D. pvγ = C

Answer: Option C

Explanation:

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