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Intercoolers:
1) Cool the air at the inlet valves
2) Must have a safety valve when used on positive displacement
3) Are used on all compressors
4) Are required to cool compressor-lubricating oil
5) Cool the air in the cylinders
Must have a safety valve when used on positive displacement
An air compressor auxiliary which will decrease the power requirement is the:
1) Receiver
2) Variable compression ratio read
3) Aftercooler
4) Diffuser
5) Intercooler
Intercooler
The valves on a reciprocating compressor are opened by:
1) A pressure difference
2) The eccentric
3) The camshaft
4) A timing gear
5) Hydraulic pressure
A pressure difference
Sliding vane compressors:
1) Are 100% efficient
2) Are double acting compressors
3) Use cylinder valves
4) Are positive displacement compressors
5) Fall into the centrifugal compressor category
Are positive displacement compressors
In a centrifugal compressor the kinetic energy is converted to potential energy in the:
1) Diffuser only
2) Compressor cavity
3) Volute, diffuser or both
4) Intercooler
5) Volute only
Volute, diffuser or both
A belt driven lubricator is very popular on a:
1) Sliding vane unit
2) Rotary lobe unit
3) Reciprocating double acting unit
4) Centrifugal unit
5) Screw unit
Sliding vane unit
Compressor unloaders:
1) Must be used on centrifugal compressors
2) Are located on the driver of the compressor
3) Could keep the suction valves open
4) Could close the discharge valves
5) Activate the stop and start button
Could keep the suction valves open
The compressor which would favor volume over pressure would be the:
1) Screw
2) Sliding vane
3) Centrifugal
4) Rotary lobe
5) Axial
Centrifugal
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