Air Compressors

The ratio of work-done per cycle to the stroke volume of the compressor is known as.......

• Compressor capacity
• Compression ratio
• Compressor efficiency
• Mean effective pressure

The capacity of a compression is 10 m3/minute.10 m 3/minute refers to.......

• Standard air
• Free air
• Compressed air
• Compressed air at delivery pressure

Aeroplanes employe following type of compressor.........

• Radial flow
• Axial flow
• Centrifugal
• Combination of above

The multi stage compression as compared to single stage compression......

• Improves volumetric efficiency for the given pressure ratio
• Reduces work done per kg of air
• Reduces cost of compressor
• All of the above

Compression efficiency is compared against.......

• Ideal compression
• adiabatic compression
• both isothermal and adiabatic compression
• Isothermal compression

The volume of air delivered by the compressor is called.......

• Free air delivery
• Compressor capacity
• Swept volume
• None of the above

The most efficient method of compressing air is to compress it.......

• Isothermal
• Adiabatically
• Isentropically
• Isobarically

Ratio of indicated HP and break HP is known as........

• Mechanical efficiency
• Volumetric efficiency
• Isothermal efficiency
• Adiabatic efficiency

Maximum work is done in compressing air when the compression is......

• Improves volumetric efficiency for the given pressure ratio
• Isothermal
• Adiabatic
• Polytropic

The value of air sucked by the compressor during its suction stroke is called.......

• Free air delivery
• Compressor capacity
• Swept volume
• none of the above