Page 27 - PNEUMATIC AND HYDRAULIC

SELF ASSESSMENT CHAPTER 1

QUESTION 1

a) Pneumatics are used for many reasons in industry and everyday life.
i. Explain pneumatic system. (2 marks)
ii. Give THREE (3) applications of pneumatics in the industries. (3 marks)

b) Describe FIVE (5) of the advantages and FIVE (5) disadvantages of using
pneumatics in industry. (10 marks)

c) List FIVE (5) basic parts in a Pneumatic System block diagram (5 marks)

QUESTION 2

a) Explain in detail principal a one stage piston compressor by using a diagram.
(10 marks)
b) What are the advantages of reciprocating multistage/double stage/double piston
compressor over single stage compressor? (5 marks)

c) What is inter-cooler? What does complete inter-cooling mean? (4 marks)

d) What are the differences between rotary air compressor and reciprocating air
compressor? (6 marks)

QUESTION 3
a) What is dew point temperature in simple terms? (3 marks)

b) A dryer is used in a compressor to lower the dew point by removing moisture
content in it. Other than after coolers to produce quality, less humid air,
dehydration must be provided using the dryer. Generally, there are a different
type of dryers:
i. Absorption type dryer
ii. Adsorption type dryer
iii. Refrigeration dryer

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