Cork Institute of Technology
Bachelor of Engineering in Building Services Engineering - Award
(EBSEN_7_Y3)
Summer 2008
Building Services Facilities Electrical – Paper 1
(Time: 3 Hours)
Instructions
Answer FIVE questions.
Examiners: Mr. S. Boljevic
Mr. D. Leonard
Dr. M. Smyth
Q1. (a) Outline and explain the most important factors taken into consideration in the designing
of a fire alarm system. (7 marks)
(b) Discuss the advantages of an addressable fire alarm system over a conventional fire
alarm system. (6 marks)
(c) In relation to fire alarm systems explain in detail the term ‘zoning’. (7 marks)
Q2. (a) With the aid of a neat sketch explain the measurement of specific earth resistance.
(5 marks)
(b) With the aid of a neat sketch explain measurement of earth electrode resistance.
(5 marks)
(c) State
five tests that must be completed before an electrical installation is energised and
with the aid of a neat sketch, explain two of your choice. (10 marks)
Q3. (a) With the aid of a neat sketch, clearly explain the operation and application of a current
transformer (CT). (10 marks)
(b) With the aid of a neat sketch clearly explain the operation and application of a voltage
transformer (VT). (10 marks)
Q4. (a) List and explain the tests with the aid of a neat sketch in recommended sequence which
should be carried out on an three phase squirrel cage motor. (14 marks)
(b) Outline and explain the method in sequential order to replace bearings in an three phase
squirrel cage motor. (6 marks)
