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ME Set-3
Pressure Vessels
145

Pressure Vessels and Engines MCQ with Answers

145) In jet engines, paraffin is usually used as the fuel because of its

high calorific value

ease of atomisation

low freezing point

(a) and (c) above

Answer is:

(a) and (c) above

Pressure Vessels and Engines MCQ with Answers

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Related Pressure Vessels and Engines MCQ with Answers

146) A rocket engine for the combustion of its fuel

carries its own oxygen

uses surrounding air

uses compressed atmospheric air

does not require oxygen

Answer is:

carries its own oxygen

A rocket engine for the combustion of its fuel

147) A rocket works with maximum overall efficiency when air craft velocity is equal to the

jet velocity

twice the jet velocity

half the jet velocity

average of the jet velocity

Answer is:

half the jet velocity

A rocket works with maximum overall efficiency when air craft velocity is equal to the

148) Propulsion efficiency of the following order-is obtained in practice

50%

60%

72%

34%

Answer is:

0.72

149) The maximum propulsion efficiency of a turbojet is attained at around following speed -

550 km/hr

1050km/hr

1700 km/hr

2400km /hr

Answer is:

2400km /hr

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