Compressors, Gas Turbines & Jet Engines MCQ Question with Answer

Compressors, Gas Turbines & Jet Engines MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 8
The compressor capacity with decrease in suction temperature

Remain unaffected
May increase or decrease depending on compressor capacity

Question No : 9
For maximum work, the reheating should be done to an intermediate pressure of (Where p₁ = Maximum pressure, and p₂ = Minimum pressure)

(p₁ - p₂)/2
(p₁ + p₂)/2
p₁ p₂

Question No : 10
The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turbine and fixed higher and lower temperature) with increase in pressure ratio will

Increase first at fast rate and then slow
Increase first at slow rate and then fast
Decrease continuously
First increase, reach maximum and then decrease

Question No : 11
In a centrifugal compressor, the ratio of the ________ to the blade velocity is called slip factor.

Inlet whirl velocity
Outlet whirl velocity
Inlet velocity of flow
Outlet velocity of flow

Question No : 12
The minimum work required for a three stage reciprocating air compressor is ________ the work required for each stage.

Equal to
Three times
Six times

Question No : 13
The efficiency of a jet engine is higher at

Low speeds
High speeds
Low altitudes
High altitudes

Question No : 14
Axial flow compressor has the following advantage over centrifugal compressor

Larger air handling ability per unit frontal area
Higher pressure ratio per stage
Aerofoil blades are used
Higher average velocities