Compressors, Gas Dynamics and Gas Turbines Questions

• The compressor capacity will be __________ if the temperature of intake air is lowest.
• Workdone by an air compressor __________ upon the way in which the air is compressed.
• A rocket engine uses __________ for the combustion of its fuel.
• In jet propulsion power unit, the inlet duct of diverging shape is used for converting kinetic energy of air into pressure energy.
• The pressure ratio in a centrifugal compressor can be increased by increasing the tip speed and lowering the inlet temperature.
• A closed cycle gas turbine consists of a
• The ratio of the net work obtained from the gas turbine plant to the turbine work is known as
• The operation of lifts, rams and pumps make use of compressed air.
• A machine used to raise the pressure of air is called
• In a jet engine, the compression varies as the square of the speed.
• Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle.
• In gas turbines, the work input with intercooling is __________ the work input with no intercooling.
• In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations.
• The perfect intercooling, in multistage compression, means that the temperature of air at inlet to subsequent stages is equal to the initial temperature.
• For perfect intercooling in a three stage compressor,
• In a single acting reciprocating air compressor, without clearance, the compression of air may be
• In open cycle turbo-jet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the
• The efficiency of roots blower __________ with the increase in pressure ratio.
• A closed cycle gas turbine works on
• The clearance, in a single stage, single acting reciprocating air compressor does not effect the workdone on the air and the power required for compressing the air.