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ME Set-3
Pressure Vessels
113

Pressure Vessels and Engines MCQ with Answers

113) Gas turbines use following type of air compressor

centrifugal type

reciprocating type

lobe type

axial flow type

Answer is:

axial flow type

Pressure Vessels and Engines MCQ with Answers

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Related Pressure Vessels and Engines MCQ with Answers

114) As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio

increases

decreases

remains same

first increases and then decreases

Answer is:

increases

115) There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

remain same

decrease

increase

unpredictable

Answer is:

increase

116) The material commonly used for air craft gas turbine is

stainless steel

high alloy′ steel

duralumin

Timken, Haste and Inconel allpys

Answer is:

Timken, Haste and Inconel allpys

117) It is not possible to use closed gas turbine cycle in aeronautical engines because

it is inefficient

it is bulky

it requires cooling water for its operation

None of these

Answer is:

it requires cooling water for its operation

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