4.9 Compressor Auxillaries and Operation

_______ on centrifugal air compressors are provided in order to control the amount of air flowing to the impeller and thus control the capacity of the unit.

The aftercooler is used in an air compression system to cool the:

The aftercooler is used in an air compression system to cool the:

Positive displacement compressor types include: 1. Sliding vane 2. Axial flow 3. Internal gear 4. Volute casing 5. Rotary screw 6. Multi lobe

Effective intercooling will reduce weakening of parts due to high temperatures, and reduce possibility of:

In the variable speed control method the compressor output is regulated by:

A method of unloading a reciprocating compressor is to:

The flow of air from a compressor must be _______ to suit the load requirements and to maintain constant pressure in the system.

To prevent surging, the load on the compressor must not be allowed to fall below the:

The ________ control method can be used when a compressor is driven by a steam engine, a turbine, or an internal combustion engine.