Gas Dynamics and Gas Turbines

Question: An axial compressor gives optimum performance at high speeds and large volume flows.
[A].

Agree

[B].

Disagree

Answer: Option A

Explanation:

No answer description available for this question.

Question: The axial flow compressor is preferred in air-craft gas turbines because of
[A].

low frontal area

[B].

higher thrust

[C].

high pressure rise

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: In axial flow compressor, exit flow angle deviation from the blade angle is a function of
[A].

blade camber

[B].

blade camber and incidence angle

[C].

space-chord ratio

[D].

blade camber and space-chord ratio

Answer: Option B

Explanation:

No answer description available for this question.

Question: In an axial flow compressor, the ratio of pressure in theTOtor blades to the pressure rise in the compressor in one stage is known as
[A].

work factor

[B].

slip factor

[C].

degree of reaction

[D].

pressure coefficient

Answer: Option C

Explanation:

No answer description available for this question.

Question: Euler’s equation can be used for
[A].

radial flow compressors

[B].

axial flow compressors

[C].

pumps

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: A centrifugal compressor is an axial flow compressor.
[A].

Correct

[B].

Incorrect

Answer: Option B

Explanation:

No answer description available for this question.

Question: If the flow of air through the compressor is parallel to its axis, then the compressor is
[A].

reciprocating compressor

[B].

centrifugal compressor

[C].

axial flow compressor

[D].

turbo-compressor

Answer: Option C

Explanation:

No answer description available for this question.

Question: If the flow of air through the compressor is perpendicular to its axis, then it is a
[A].

reciprocating compressor

[B].

centrifugal compressor

[C].

axial flow compressor

[D].

turbo compressor

Answer: Option B

Explanation:

No answer description available for this question.

Question: In axial flow compressors, the flow of air is parallel to the axis of compressor.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: The air is delivered __________ in one revolution in case of a three-lobbed rotor.
[A].

two times

[B].

three times

[C].

four times

[D].

six times

Answer: Option D

Explanation:

No answer description available for this question.