Mechanical Engineering - Thermodynamics

26. 

In an isolated system, neither the heat and work nor the, mass of the working substance crosses the boundary of the system.

A. True
B. False

Answer: Option A

Explanation:

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

27. 

The compression ratio is the ratio of

A. swept volume to total volume
B. total volume to swept volume
C. swept volume to clearance volume
D. total volume to clearance volume

Answer: Option D

Explanation:

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

28. 

When a fluid is allowed to expand suddenly into a vaccum chamber through an orifice of large dimensions, the process is known as free expansion process.

A. True
B. False

Answer: Option A

Explanation:

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

29. 

The efficiency of Ericsson 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.

30. 

One molecule of oxygen consists of __________ atoms of oxygen.

A. 2
B. 4
C. 8
D. 16

Answer: Option A

Explanation:

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