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WorksheetsCentral heating revision level 2
Total questions: 12
Worksheet time: 6mins
1. Which one of the following documents in the building regulations covers the conservation of fuel and power in domestic properties?
Part L3.
Part L4
Part L1
Part L2
1. An automatic bypass valve is activated by the
boiler being shutting off
programmer being switched on
pressure of the incoming water service
pressure created within the system
1. The main reason a radiator should be installed 150 mm above floor level is to
reduce the risk of fire
allow the heat to circulate
protect the flooring from possible leaks
allow easier access for maintenance work
1. A thermostatic radiator valve opens and closes as a result of the temperature of the
boiler thermostat
room it is installed in
stored hot water
water in the heating system
1. A pump should be positioned so that the heating system is operating under
no pressure
positive pressure
both positive and negative pressure
negative pressure
When soundness testing a rigid pipe system, the test pressure should be
1 ½ times the maximum working pressure
2 times the maximum working pressure
2½ times the maximum working pressure
10 times the maximum working pressure
1. Installing an air separator allows which one of the following to take place?
Close coupling of the flow and return connections.
Close coupling of the pump and the vent connections.
Close coupling of the cold feed and vent connections.
Close coupling of the motorised valve connection
Which port is the central heating flow connected to on a mid-position valve
AB
A
B
BA
In a central heating installation the primary pipework connects the
boiler and the cylinder
cylinder and the outlets
cylinder and the radiators
feed cistern and the cylinder
1. By which one of the following processes do radiators give out 85% of their heat?
Conduction.
Radiation.
Emission
Convection.
1. Condensing boilers are specifically designed to
provide instant hot water
Provide hot water at low temperature
extract more heat from the flue gases
extract less heat from the flue gases
In a modern central heating system a pressure pin would be found in the
anti-gravity valve
lockshield radiator valve
thermostatic radiator valve
wheel head radiator valve
