QuizMaster

Question: A rocket engine uses __________ for the combustion of its fuel.
[A].

surrounding air

[B].

compressed atmospheric air

[C].

its own oxygen

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
[A].

exit nozzle, which is a constant volume process

[B].

exit nozzle, which is essentially an isentropic process

[C].

turbine blades, which is a constant volume process

[D].

turbine blades, which is essentially an isentropic process

Answer: Option D

Explanation:

No answer description available for this question.

Question: In open cycle turbo-jet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the
[A].

thrust and range of aircraft

[B].

efficiency of the engine

[C].

both (a) and (b)

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into
[A].

atmosphere

[B].

vacuum

[C].

discharge nozzle

[D].

back to the compressor

Answer: Option C

Explanation:

No answer description available for this question.

Question: A simple turbo-jet engine is basically a gas turbine engine equipped with a propulsive nozzle and diffuser.
[A].

Agree

[B].

Disagree

Answer: Option A

Explanation:

No answer description available for this question.

Question: A turbo-prop is preferred to turbo-jet because
[A].

it has high propulsive efficiency at high speeds

[B].

it can fly at super sonic speeds

[C].

it can fly at high elevations

[D].

it has high power for take off

Answer: Option D

Explanation:

No answer description available for this question.

Question: In a jet propulsion
[A].

the propulsive matter is ejected from within the propelled body

[B].

the propulsive matter is caused to flow around the propelled body

[C].

its functioning does not depend upon presence of air

[D].

none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Question: In the aircraft propellers
[A].

the propulsive matter is ejected from within the propelled body

[B].

the propulsive matter is caused to flow around the propelled body

[C].

its functioning does not depend upon the presence of air

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a jet engine, the air-fuel ratio is
[A].

30:1

[B].

40:1

[C].

50:1

[D].

60:1

Answer: Option D

Explanation:

No answer description available for this question.

Question: In a jet engine, the compression varies as the square of the speed.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.