QuizMaster

Question: In jet propulsion power unit, the inlet duct of diverging shape is used for converting kinetic energy of air into pressure energy.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: A jet engine has
[A].

no propeller

[B].

propeller in front

[C].

propeller at back

[D].

propeller on the top

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following statement is correct as regard to centrifugal compressors?
[A].

The flow of air is parallel to the axis of the compressor.

[B].

The static pressure of air in the impeller increases in order to provide centripetal force on the air.

[C].

The impeller rotates at high speeds.

[D].

The maximum efficiency is higher than multi-stage axial flow compressors.

Answer: Option B

Explanation:

No answer description available for this question.

Question: A compressor mostly used for supercharging of I.C. engines is
[A].

radial flow compressor

[B].

axial flow compressor

[C].

roots blower

[D].

reciprocating compressor

Answer: Option A

Explanation:

No answer description available for this question.

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.