Mechanical Engineering - Thermodynamics

41. 

The workdone in a free expansion process is zero.

A. True
B. False

Answer: Option A

Explanation:

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

42. 

When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as

A. thermodynamic law
B. thermodynamic process
C. thermodynamic cycle
D. none of these

Answer: Option B

Explanation:

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

43. 

The fuel mostly used in blast furnace for extracting pig iron from iron ores is

A. hard coke
B. soft coke
C. pulverised coal
D. bituminous coal

Answer: Option A

Explanation:

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

44. 

The ultimate analysis of coal consists of the determination of the percentage of

A. carbon
B. hydrogen and nitrogen
C. sulphur and ash
D. all of these

Answer: Option D

Explanation:

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

45. 

The change of entropy, when heat is removed from the gas, is positive.

A. Yes
B. No

Answer: Option B

Explanation:

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