COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

Reduction of speed of incoming air and conversion of part of it into pressure energy

Increasing speed of incoming air

Compression of inlet air

Lost work

The work-done in each stage should be same

All of the listed here

The intercooling should be perfect

The compression ratio in each stage should be same

Increases

Does not change

Decreases

First decrease and then increase

After receiver

After inter-cooler

Between after-cooler and air receiver

Before inter-cooler

Large quantity of air at low pressure

Large quantity of air at high pressure

Small quantity of air at low pressure

Small quantity of air at high pressure

It permits isothermal compression

It results in minimum work

It allows maximum compression to be achieved

It greatly affects volumetric efficiency

Cool the air

Remove impurities from air

Cause moisture and oil vapour to drop out

Reduce volume of air

in the center

between ~ to i of the blade height

at the base

at the tip

Injecting ammonia into the combustion chamber

Burning fuel after gas turbine

All of these

Injecting water into the compressor

Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio

Volume of free air delivery per stroke to the swept volume of the piston

Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor

Isentropic power to the power required to drive the compressor