Page 114 - Pneumatic ebook (2)_draft 13 sept 2021

Introduction to Pneumatic System

4. Which of the following statement describes best about the diagram shown below?

A. air flows from the compressor to an aftercooler that lowers the temperature (within
10-15°C of the cooling medium), causes condensation and removes the majority
of water.

B. a steel shell housing tubes with water circulating on one side and air on the other,
usually arranged so that the flow is in opposite directions through the cooler.

C. The cold dry air return pipe passes through air heat exchanger and gains heat
from the incoming high temperature air.

5. What is the purpose of air treatment in air generation system?

A. Toremove heat after compression, the air should be further cooled as
near as possible to the point of use

B. To remove remaining moisture, contaminants such as fine particles of
carbonised oil, pipe scale and other foreign matter, the air should be further
cleaned as near as possible to the point of use

C. Toremove moisture from the air after air is cooled down by air dryers.

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