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CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Autumn Examinations 2008/
Module Title: Building Services Processes CA
Module Code: MECH 6002
School: Mechanical & Process Engineering
Programme Bachelor of Engineering in Building Services Engineering – Stage 1
Programme Code: EBSEN_7_Y
External Examiner(s): Dr. M. Smyth, Mr. P. O Sullivan Internal Examiner(s): Fergus Delaney
Instructions: Attempt one question from Section A, one question from Section B,
one question from Section C and one other question from any section.
Use separate answer books for each section.
Duration: 2 Hours
Sitting: Autumn 2009
Requirements for this examination:
Note to Candidates: Please check the Programme Title and the Module Title to ensure that you have received the correct examination paper. If in doubt please contact an Invigilator.
Section A
QA
Attempt the following 20 multiple choice questions. Fill in your answers on the attached sheet, put your name on it and return it with your answer book for Section A. 1 mark for each multiple choice question.
A1.1) The most common type of pump in building services is
a) Vertical b) Horizontal c) Centrifugal
A1.2) In critical pumping applications pumps should be installed in the following configuration
a) duty standby b) Reverse return c) Opposed flow
A1.3) Motor connections to pumps can be
a) Close coupled, direct coupled or parallel coupled b) Close coupled, direct coupled or belt & pulley c) None of the above
A1.4) The acronym VSD stands for
a) Vertical speed drive b) Variable speed drive c) Variable speed dynomometer
A1.5) The function of a pressurisation unit is to a) maintain minimum pressure in the piping system to ensure the water does not boil b) pressurise the pump c) none of the above
A1.6) The flow temperature and pressure for a LPHW system is
a) 100 o^ C, 0.5 bar b) 100 o^ C, 1.0 bar c) 82 o^ C, 1.0 bar
A1.12) Which of the following symbols represents an FODRV?
(a) (b) (c)
A1.13) Which of the following symbols represents a pressure relief valve?
(a) (b) (c)
A1.14) The function of a 3 port motorised control valve is
a) Mix two fluid streams in varying proportions. b) Control three ports of a pump. c) None of the above.
A1.15) A primary circuit is
a) The largest heating circuit in the building. b) The main heat generating circuit in the boiler plantroom. c) The return piping on a heating circuit.
A1.16) A secondary circuit is
a) A heating circuit of the header serving heat emitters. b) The second largest heating circuit in the building c) None of the above
A1.17) Which of the following statements describes a BEMS
a) A computerised supervisory control system for all mechanical and electrical building services systems.
b) A software programme to calculate energy usage. c) A control valve to limit energy usage.
A1.18) Which of the following statements describes a motor control panel
a) A device to allow variable speed control of motors. b) A computerised supervisory control system for all mechanical and electrical building services systems. c) A panel consisting of relays and contactors to bring power on to motors with visual indication of motor status (run, standby, tripped)
A1.19) A compensated heating circuit is typically used on
a) Hot water calorifiers. b) AHU circuits c) Radiator circuits
A1.20) A header is a
a) A piping manifold to allow the distribution of water to different heating circuits. b) The highest point on a heating system. c) A piping manifold to allow the distribution of water to different boilers.
QA
a) State the function of each of the following valves : 3 port motorised valve Non return valve Fixed orifice double regulating valve (4 marks)
b) Draw a boiler plantroom schematic for an MPHW system consisting of the following:
A primary circuit with two boilers in parallel, a primary circulating pump, a common flow and return header. Two number secondary compensated heating radiator circuits. Your schematic must include all the appropriate vales for the safe operation and commissioning of the system (16 marks)
Section B
QB
(a) State two processes for joining copper pipe (5 marks)
(b) List the tools and equipment required for both processes. (8 marks)
(c) List the tools and equipment required to make straight connection joint between a 15mm qualpex pipe and a 15mm copper pipe. (5 marks)
(d) What is the function of the insert used when a fitting is applied to the end of the qualpex pipe? (2 marks)
QC2 Answer each of the following short answer questions. Each question is worth 2 marks
C2.1 Name the act that covers Health and Safety at work.
C2.2 What is the correct angle of a ladder when in use?
C2.3 List 5 items of PPE used when working on construction sites.
C2.4 What is a sealed central heating system?
C2.5 Describe an indirect hot and cold domestic water system.
C2.6 What is the purpose of trap on a domestic waste water system?
C2.7 Where would you use Zone control valves, Programmers, Timers and Thermostats?
C2.8 How is mild steel pipe joined? List 2 ways.
C2.9 How do thermostatic radiator valve work?
C2.10 State 3 methods of joining ABS and PVC pipe.
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QA1 Building Services Processess Autumn 2009 Repeat
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