Compressors, Gas Dynamics and Gas Turbines Questions

• A compressor must be driven by some prime mover.
• The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)
• In air compressors, free air delivery means the
• Volumetric efficiency of a compressor decreases with __________ in compression ratio.
• Which of the following statement is correct?
• If the flow of air through the compressor is parallel to its axis, then the compressor is
• For minimum work required to compress and deliver a quantity of air by multi-stage compression,
• A turbo-prop is preferred to turbo-jet because
• If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by
• In a high pressure compressor, the delivery pressure is
• In a single stage, single acting reciprocating air compressor without clearance volume, the workdone is maximum during
• The volume of air delivered in a medium capacity air compressor per unit time is
• A simple turbo-jet engine is basically a gas turbine engine equipped with a propulsive nozzle and diffuser.
• The propulsive power of the rocket is (where v1 = Jet velocity, and v2 = Air-craft velocity)
• In n1 and n2 are the indices of compression for the first and second stage of compression, then the ratio of workdone on the first and second stages (W1/W2) with perfect intercoooing is given by
• A compressor at high altitudes will require __________ power.
• The operation of the reciprocating air motor is similar to reciprocating air compressor.
• Separators are generally used in air compressor installations
• The mean effective pressure of the compressor is the
• In axial flow compressors, the flow of air is parallel to the axis of compressor.