Compressors, Gas Turbines and Jet Engines An after-cooler is used to Remove impurities from air Cool the air Reduce volume of air Cause moisture and oil vapour to drop out Remove impurities from air Cool the air Reduce volume of air Cause moisture and oil vapour to drop out ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Water gas is produced by Passing steam over incandescent coke Passing air and a large amount of steam over waste coal at about 65°C Partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast Carbonisation of coal Passing steam over incandescent coke Passing air and a large amount of steam over waste coal at about 65°C Partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast Carbonisation of coal ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The clearance volume of the air compressor is kept minimum because It greatly affects volumetric efficiency It permits isothermal compression It allows maximum compression to be achieved It results in minimum work It greatly affects volumetric efficiency It permits isothermal compression It allows maximum compression to be achieved It results in minimum work ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines When air is to be compressed at a high pressure, then it is advantageous to use Multistage compression without intercooling Multistage compression with intercooling None of these Single stage compression Multistage compression without intercooling Multistage compression with intercooling None of these Single stage compression ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Gas turbine blades are given a rake Depending on the velocity In the direction of motion of blades Opposite to the direction of motion of blades Equal to zero Depending on the velocity In the direction of motion of blades Opposite to the direction of motion of blades Equal to zero ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Volumetric efficiency of a compressor without clearance volume Decreases with increase in compression ratio May increase/decrease depending on compressor capacity Is not dependent upon compression ratio Increases with increase in compression ratio Decreases with increase in compression ratio May increase/decrease depending on compressor capacity Is not dependent upon compression ratio Increases with increase in compression ratio ANSWER DOWNLOAD EXAMIANS APP
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