Gas Dynamics and Gas Turbines

Question: A regenerator in a gas turbine improves thermal efficiency.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: For maximum work, the reheating should be done to an intermediate pressure of (where p1 = Maximum pressure, and p2 = Minimum pressure)
[A].

[B].

[C].

[D].

p1p2

Answer: Option D

Explanation:

No answer description available for this question.

Question: A closed cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.
[A].

same

[B].

lower

[C].

higher

Answer: Option C

Explanation:

No answer description available for this question.

Question: In gas turbines, the work input with intercooling is __________ the work input with no intercooling.
[A].

less man

[B].

more than

Answer: Option A

Explanation:

No answer description available for this question.

Question: Intercooling in gas turbines
[A].

decreases net output but increases thermal efficiency

[B].

increases net output but decreases thermal efficiency

[C].

decreases net output and thermal efficiency both

[D].

increases net output and thermal efficiency both

Answer: Option B

Explanation:

No answer description available for this question.

Question: A gas turbine used in air-craft should have low weight and small frontal area.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: A closed cycle gas turbine consists of a
[A].

compressor

[B].

heating chamber

[C].

cooling chamber

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: An open cycle gas turbine works on the same cycle as that of a closed cycle gas turbine.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: A closed cycle gas turbine works on
[A].

Carnot cycle

[B].

Rankine cycle

[C].

Ericsson cycle

[D].

Joule cycle

Answer: Option D

Explanation:

No answer description available for this question.

Question: Gas turbine as compared to internal combustion engine
[A].

can be driven at a very high speed

[B].

produces uniform torque

[C].

has more efficiency

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.