Compressors, Gas Turbines and Jet Engines MCQs

Question 1

For perfect intercooling in a two stage compressor

Accepted Answer

$$\frac{{{{	ext{p}}_2}}}{{{{	ext{p}}_1}}} = \frac{{{{	ext{p}}_3}}}{{{{	ext{p}}_2}}}$$

Answer

$$\frac{{{{	ext{p}}_1}}}{{{{	ext{p}}_3}}} = \frac{{{{	ext{p}}_2}}}{{{{	ext{p}}_1}}}$$

Answer

$${{	ext{p}}_1} = {{	ext{p}}_3}$$

Answer

$${{	ext{p}}_1} = {{	ext{p}}_2}{{	ext{p}}_3}$$

Question 2

The weight per horse power ratio for gas in Turbine as compared to I.C. engine and steam turbine is

Accepted Answer

Lower

Answer

Same

Answer

Higher

Answer

None of these

Question 3

The volume of air sucked by the compressor during its suction stroke is called

Accepted Answer

Swept volume

Answer

Free air delivery

Answer

Compressor capacity

Answer

None of these

Question 4

A centrifugal compressor works on the principle of

Accepted Answer

Conversion of kinetic energy into pressure energy

Answer

Conversion of pressure energy into kinetic energy

Answer

Centripetal action

Answer

Generating pressure directly

Question 5

Only rocket engines can be propelled to space because

Accepted Answer

They are not air breathing engines

Answer

They can generate very high thrust

Answer

They have high propulsion efficiency

Answer

These engines can work on several fuels

Question 6

Gas turbine as compared to steam turbine

Accepted Answer

All of these

Answer

Requires less space for installation

Answer

Has compressor and combustion chamber

Answer

Has less efficiency

Question 7

Water is injected in gas turbine cycle to

Accepted Answer

Control output of turbine

Answer

Control temperature

Answer

Control fire hazards

Answer

Increase efficiency

Question 8

Gas turbine works on

Accepted Answer

Brayton or Atkinson cycle

Answer

Carnot cycle

Answer

Rankine cycle

Answer

Ericsson cycle

Question 9

A closed cycle gas turbine works on

Accepted Answer

Joule cycle

Answer

Carnot cycle

Answer

Rankine cycle

Answer

Ericsson cycle