Mechanical Engineering - Thermodynamics

11. 

The processes occuring in open system which permit the transfer of mass to and from the system, are known as

A. flow processes
B. non-flow processes
C. adiabatic processes
D. none of these

Answer: Option A

Explanation:

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12. 

Which of the following has the minimum atomic mass?

A. Oxygen
B. Sulphur
C. Nitrogen
D. Carbon

Answer: Option D

Explanation:

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13. 

Workdone in a free expansion process is

A. zero
B. minimum
C. maximum
D. positive

Answer: Option A

Explanation:

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14. 

The pressure exerted by an ideal gas is __________ of the kinetic energy of all the molecules contained in a unit volume of gas.

A. one-half
B. one-third
C. two-third
D. three-fourth

Answer: Option C

Explanation:

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15. 

The compression ratio for petrol engines is

A. 3 to 6
B. 5 to 8
C. 15 to 20
D. 20 to 30

Answer: Option B

Explanation:

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