Cork Institute of Technology
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Higher Certificate in Engineering in Maintenance Technology – Award
(National Certificate in Engineering in Maintenance Engineering – Award)
(NFQ – Level 6)
Summer 2005
Maintenance Technology
(Time: 3 Hours)
Instructions:
Answer any FIVE questions.
All questions carry equal marks.
Examiners: Mr. D. O’Brien
Mr. R Simpson
Mr J Connolly
Q1. Electric Motors:
(a) Produce a diagram of a cutaway section of an AC Induction motor showing the main
parts.
(7 marks)
(b) A variety of mounting styles are available for the AC induction motor. Describe two of
these mounting styles, and give an industrial example for each. (4 marks)
(c) Many different environmental enclosures exist for the AC induction motor. Describe the
IP classification system. (3 marks)
(d) Overheating results from a variety of different motor problems. Describe any three of
these. (3 marks)
(e) Describe three items in an AC induction motor, which should be checked at regular
intervals. (3 marks)
Q2.
Instrumentation:
(a) Distinguish between a temperature indicator and a temperature transmitter. (3 marks)
(b) What is the function of a temperature chart recorder? What device has superseded the
chart recorder? (3 marks)
(c) Describe using sketches the principle of operation of a thermocouple. (4 marks)
(d) Briefly describe the principle of operation of a Differential Pressure Transmitter.
(5 marks)
