Mechanical Engineering - Thermodynamics

41. 

The constant pressure, constant volume and constant pvn processes are regarded as irreversible process.

A. True
B. False

Answer: Option A

Explanation:

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42. 

Stirling and Ericsson cycles are

A. reversible cycles
B. irreversible cycles
C. semi-reversible cycles
D. quasi-static cycles

Answer: Option A

Explanation:

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43. 

When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.

A. zero
B. 1/5
C. 4/5
D. 1

Answer: Option A

Explanation:

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44. 

A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as

A. reversible cycle
B. irreversible cycle
C. thermodynamic cycle
D. none of these

Answer: Option C

Explanation:

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45. 

An isothermal process is governed by

A. Boyle's law
B. Charles' law
C. Gay-Lussac law
D. Avogadro's law

Answer: Option A

Explanation:

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