Mechanical Engineering - Thermodynamics

21. 

Carbonisation of coal consists of

A. drying and crushing the coal to a fine powder
B. moulding the finely ground coal under pressure with or without a binding material
C. heating the wood with a limited supply of air to temperature not less than 280°C
D. none of the above

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

22. 

The efficiency of Stirling cycle is __________ Carnot cycle.

A. greater than
B. less than
C. equal to

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

23. 

According to Gay-Lussac law for a perfect gas, p/T = constant, if v is kept constant.

A. True
B. False

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

24. 

There is no change in internal energy in an isothermal process.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

25. 

If the value of n = 0 in the equation pvn = C, then the process is called

A. constant volume process
B. adiabatic process
C. constant pressure process
D. isothermal process

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.