Correct
Incorrect
✅ The correct answer is option A.
Compressors
In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
exit nozzle, which is a constant volume process
exit nozzle, which is essentially an isentropic process
turbine blades, which is a constant volume process
turbine blades, which
✅ The correct answer is option D.
The propulsive power of the rocket is (where v1 = Jet velocity, and v2 = Air-craft velocity)
✅ The correct answer is option A.
When air is to be compressed at a high pressure, then it is advantageous to use
single stage compression
multi-stage compression without intercooling
multi-stage compression with intercooling
none of these
✅ The correct answer is option C.
Volumetric efficiency of a compressor decreases with __________ in compression ratio.
decrease
increase
✅ The correct answer is option B.
Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle.
Agree
Disagree
✅ The correct answer is option A.
The compressor efficiency is defined as the ratio of volume of free air delivery per stroke to the swept volume of the piston.
Correct
Incorrect
✅ The correct answer is option B.
The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)
rγ – 1
1 – rγ – 1
✅ The correct answer is option C.
The pressure of air at the beginning of the compression stroke is __________ the atmospheric pressure.
equal to
less than
more than
✅ The correct answer is option B.
The ratio of the isothermal power to the shaft power or brake power of the motor or engine required to drive the compressor is called overall isothermal efficiency.
TRUE
FALSE
✅ The correct answer is option A.