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.

Question No : 36
More than one stage will be preferred for reciprocating compressor if the delivery pressure is more than

2 kg/cm²

6 kg/cm²

10 kg/cm²

14.7 kg/cm²

Question No : 37
Work ratio of a gas turbine may be improved by

Decreasing the compression work

Increasing the compression work

Increasing the turbine work

Both (A) and (C) above

Question No : 38
A turboprop is preferred to turbojet because

It has high propulsive efficiency at high speeds

It can fly at supersonic speeds

It can fly at high elevations

It has high power for take off

Question No : 39
A gas turbine used in air craft should have

High h.p. and low weight

Low weight and small frontal area

Small frontal area and high h.p.

High speed and high h.p

Question No : 40
The assumption made in two stage compression with intercooler is that

There is no pressure drop in the intercooler

The compression in both the cylinders is polytropic

The suction and delivery of air takes place at constant pressure

All of the above

Question No : 41
In jet engines the products of combustion after passing through the gas turbine are discharged into

Atmosphere

Back to the compressor

Discharge nozzle

Vacuum

Question No : 42
For perfect intercooling in a two stage compressor

p₂/p₁ = p₃/p₂

p₁/p₃ = p₂/p₁

p₁ = p₃

p₁ = p₂ p₃