Free air is the air at atmospheric conditions at any specific location.

More Questions from Compressors, Gas Dynamics and Gas Turbines

• For maximum work, the reheating should be done to an intermediate pressure of (where p1 = Maximum pressure, and p2 = Minimum pressure)
• Which of the following statement is correct relating to rocket engines?
• In a single stage, single acting reciprocating air compressor, without clearance, the workdone on the air during isentropic compression is __________ the heat required to raise the temperature of air from T1 to T2 at a constant pressure.
• The pressure of air at the beginning of the compression stroke is __________ the atmospheric pressure.
• The process, which causes the air to enter the impeller blades of a centrifugal compressor at __________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.
• The axial flow compressor is preferred in air-craft gas turbines because of
• Which of the following statement is correct as regard to centrifugal compressors?
• The mass of gas turbine per kW developed is about __________ as that of an I.C. engine.
• In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
• The performance of air compressor at high altitudes will be __________ as compared to that at sea level.

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