Page 120 - Pneumatic ebook (2)_draft 13 sept 2021

ANSWERS

Chapter 1: Introduction to Pneumatic

System Answer.

1. B - A system that uses compressed air to control energy to perform useful work.
2. C - The air from the atmosphere is reduce in volume by compression, thus
increasing its pressure.
3. B - Compressed air.
4. B - Dryer
5. C - It is using unlubricated air which is clean.
6. A - Flow control valve.
7. C - To maximize performance and extend the life of the components doing the
work in a pneumatic system
8. Actuator / cylinder
9. A – Air filter, regulator.
10. C - Pressure switch, electric motor, compressor, check valve

Chapter 1: Introduction to Pneumatic System – Air dehydration &

Treatment Answer.

1. B - False
2. B - Aftercoolers.
3. A – Desiccant air dryers.
4. 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.
5. 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

Chapter 1: Introduction to Pneumatic System –

Valves Answer.

1. B - Control the direction of the air.
2. C – hydraulically.
3. B – 5.
4. D – sequence valve.
5. D – pressure control valve.
6. A – one way flow control valve.
7. B – 3/2 way NC pushbutton DCV with spring
return.
8. D – 4/2 way single pilot DCV with spring return.
9. C – 4/3 way hand lever valve with closed mid
position.
10. D – quick exhaust valve.
11. C – check valve.
12. B – filter.
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