13655799
Description
Quiz by Jarmo Tossavainen, updated more than 1 year ago
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Created by Jarmo Tossavainen
almost 6 years ago
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Question 1
Question
1/ Which part of the Building Regulations deals with the energy efficient
installation of central heating systems in domestic properties?
Answer
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a) Part G
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b) Part L1
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c) Part L2
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d) Part M
Question 2
Question
2/ Details of the heat output requirement for a particular radiator can be found in
which of the following documents?
Answer
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a) British Standards
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b) Water Regulations
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c) Building Regulations
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d) Manufacturer’s brochure
Question 3
Question
3/ What is the likely outcome of rigidly fixing central heating pipework to the
notched sections in timber first floor joists?
Answer
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a) Rupture of the pipework
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b) A reduction in energy efficiency
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c) Corrosion of the pipework
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d) Expansion and contraction noise
Question 4
Question
4/ The main disadvantage of using a one pipe circuit to the radiators in a central
heating system is that –
Answer
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a) The last radiator on the circuit will be fed with water at a lower temperature than the first
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b) The first radiator on the circuit will be fed with water at a lower temperature than the last
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c) Pipework feeding all radiators must be 22mm in diameter
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d) The circuit cannot be pumped, gravity circulation must be used
Question 5
Question
5/ Which fully pumped central heating system control component is missing from
` the following diagram?
Answer
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a) Pump
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b) Cylinder thermostat
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c) Room thermostat
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d) Mid-position valve
Question 6
Question
6/ What is the minimum size of open vent pipe to a fully pumped central heating
system in a small domestic property?
Answer
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a) 10mm
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b) 15mm
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c) 22mm
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d) 28mm
Question 7
Question
7/ Which one of the following additional components will require to be installed
when replacing a single feed indirect cylinder with a double feed indirect
cylinder?
Answer
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a) Frost thermostat
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b) Feed and expansion cistern
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c) Cold water storage cistern
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d) Automatic bypass valve
Question 8
Question
What would be the main effect on the central heating system
if the circulator was installed in the position shown in this diagram?
Answer
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a. The system would be under negative pressure
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b. The system would be mostly under negative pressure
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c. The system would be pumping over the open vent
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d. The neutral position would be at the base of the open vent.
Question 9
Question
The feed and expansion cistern in an open vented central heating system
should be capable of receiving what percentage volume of water from the
heating system when heated –
Answer
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a) 2%
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b) 4%
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c) 8%
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d) 16%
Question 10
Question
The recommended vertical height from floor level to the position of a room
thermostat is –
Answer
-
a) 1.0m
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b) 1.5m
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c) 2.0m
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d) 2.5m
Question 11
Question
Which air separator port in the following diagram is the flow pipe from the
boiler connected to?
Answer
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a) Port 1
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b) Port 2
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c) Port 3
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d) Port 4
Question 12
Question
Which of the following statements is correct in relation to the installation of
thermostatic radiator valves?
Answer
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a) Thermostatic radiator valves may only be fitted to ground floor radiators in a property
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b) Thermostatic radiator valves may only be fitted to first floor radiators in a property
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c) All radiators in a property should be fitted with thermostatic radiator valves
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d) At least one radiator in a property should be fitted without a thermostatic radiator valve
Question 13
Question
Which pipe connects to the AB port of the mid-position valve in the following
diagram?
Answer
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a) Open vent pipe
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b) Flow pipe to the cylinder
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c) Return pipe from the cylinder
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d) Flow pipe from the pump
Question 14
Question
Which of the following components is fitted at the high points in pipework in
central heating systems?
Answer
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a) Automatic air vent
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b) Non-return valve
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c) Automatic bypass valve
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d) Drain valve
Question 15
Question
Central heating systems with metallic pipework materials are normally
soundness tested to what test pressure?
Answer
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a) 0.5 times the maximum operating pressure
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b) The maximum operating pressure
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c) 1.5 times the maximum operating pressure
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d) Twice the maximum operating pressure
Question 16
Question
Which of the following is part of the commissioning procedure for a new
central heating system?
Answer
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a) Hot flushing to assist with flux removal
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b) Disinfecting the system with chlorine
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c) Removing the feed & expansion cistern during filling
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d) Lubricating the circulating pump with oil
Question 17
Question
When replacing a radiator and its associated valves sited on the first floor of a
property which is the most efficient way of draining the water to undertake the
work?
Answer
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a) Turn off the valves and drain down the radiator
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b) Completely drain the whole system
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c) Drain the system to below the first floor
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d) Isolate the cistern and empty its contents
Question 18
Question
The safest method of ensuring that the electrical controls in a central heating
system cannot be re-activated during temporary decommissioning work is to –
Answer
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a) Isolate the system from the supply at the consumer unit and get on with the work
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b) Switch off the supply to the system at the fused spur, retain the fuse and check for safe isolation
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c) Switch off the supply to the system at the fused spur and check for safe isolation
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d) Switch off the fused spur remove the wires from its outlet and tape up the ends
Question 19
Question
What is the likely problem arising from a bypass not being fitted to an open
vented close-coupled fully pumped heating system controlled by 2 x two port
valves on the heating and hot water circuits?
Answer
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a) ‘Sucking down’ and ‘pumping over’ the open vent pipe
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b) Blockage occurring in the cold feed pipe
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c) Rapid pinhole corrosion of the radiators
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d) No cool water from the f & e cistern if the system overheats
Question 20
Question
Which of the following central heating components may contain a replaceable
packing gland?
Answer
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a) Circulating pump
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b) Automatic air vent
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c) Thermostatic radiator valve
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d) Room thermostat
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