Compressors, Gas Dynamics and Gas Turbines Questions

• For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages.
• The degree of reaction is usually kept __________ for all types of axial flow compressors.
• The compressor capacity is defined as the
• In a centrifugal compressor, the flow of air is __________ to the axis of compressor.
• The ratio of the isentropic work to the Euler's work is known as pressure coefficient.
• In a double acting compressor, the air is compressed
• If the flow of air through the compressor is perpendicular to its axis, then it is a
• The minimum work required for a three stage reciprocating air compressor is __________ the work required for each stage.
• For minimum work in multi-stage compression, the workdone on all stages should be equal.
• In a closed cycle gas turbine, the air is compressed
• The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
• A 3 m3/min compressor means that it
• Slip factor in a centrifugal compressor indicates the amount of air leaked from the storage vessel.
• The compression ratio for the compressor is always __________ unity.
• The thrust of a jet propulsion power unit can be increased by
• With the decrease in compression ratio, the volumetric efficiency
• The overall isothermal efficiency of the compressor is defined as the ratio of
• In a single stage, single acting reciprocating air compressor, without clearance volume, the workdone is minimum during
• The volumetric efficiency of the compressor is defined as the ratio of volume of free air delivery per stroke to the swept volume of the piston.
• The gas in cooling chamber of a closed cycle gas turbine is cooled at