Cork Institute of Technology
Higher Certificate in Engineering in Mechanical Engineering - Stage 1
(National Certificate in Engineering in Mechanical Engineering โ Stage 1)
(NFQ โ Level 6)
Summer 2005
Machine Systems (Pneumatics & Hydraulics)
(Time: 2.5 Hours)
Instructions: Examiners: Mr. Sean Williams
Answer four questions. Mr. Manfred Uhlemann
All questions carry equal marks. Mr. J. Connelly
Mr. R. Simpson
Q1. (a) List five safety precautions associated with compressed air. (5 marks)
(b) Identify three positive and two negative characteristics of pneumatics. (5 marks)
(c) Give, in your own words, an interpretation of Boyles Law.
Use sketches if necessary. (10 marks)
(d) Describe the most efficient method of removing water from compressed air.
(5 marks)
Q2. (a) Make a neat sketch to show the typical layout of an air generation system.
(8 marks)
(b) Name the seven predominant components within air generation systems and state their
function. (7 marks)
(c) Identify two industrial applications where oil free compressed air is required.
(5 marks)
(d) Name two ways of producing completely oil free compressed air. (5 marks)
Q3. (a) Sketch an inverted bucket drain trap and describe how it works. (9 marks)
