The increase in pressure in a roots blower is entirely due to back flow of air.

More Questions from Compressors, Gas Dynamics and Gas Turbines

• A rocket works with maximum overall efficiency when air-craft velocity is __________ the jet velocity.
• The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the
• The compression ratio in a gas turbine is
• The volume of air delivered by the compressor is called
• The compressed air may be used
• The ratio of workdone per cycle to the stroke volume of the compressor is known as
• Which of the following statement is correct?
• The clearance volume in the compressor is kept minimum because it effects on volumetric efficiency.
• When the temperature of air leaving the intercooler, in a two stage compression with intercooler, is __________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.
• The increase in pressure in a vane blower takes place first due to compression and then due to back flow of air.

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