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WorksheetsGMJ 9189 Phase 2 Central Heating MCQ
Total questions: 20
Worksheet time: 10mins
Installing an air separator allows which one of the following to take place?
Close coupling of the cold feed and vent connections
Close coupling of the flow and return connections
Close coupling of the pump and the vent connections
Close coupling of the motorised valve connections
Which one of the following Building Regulations discusses the control of heating systems within new-build dwellings?
Part L1a
Part L1b
Part L2a
Part L2b
Condensing boilers are specifically designed to…
Provide stored hot water
Extract less heat from the flue gases
Extract more heat from the flue gases
Provide hot water at low temperatures
A district heating system is feeding a number of high-rise flats. Hydraulic separation is required - how is this achieved within each flat?
Heat recovery unit
Ground source heat pump
Heat interface unit
Air source heat pump
A thermostatic radiator valve opens and closes as a result of the temperature of the…
Primary circuit
Boiler
Space it's installed in
Return pipework
By which one of the following processes do radiators give out 70% of their heat?
Conduction
Convection
Radiation
Emission
Which one of the following describes the purpose of background heating?
Heat the property quicker than full central heating
Heat only certain rooms in the property, as required
Heat the property to a lower temperature than full central heating
Heat the property to a higher temperature than full central heating
Which one of the following is the best installation position for a cylinder thermostat?
¼ down from the top of the cylinder
⅓ down from the top of the cylinder
¼ up from the bottom of the cylinder
⅓ up from the bottom of the cylinder
Which port is the central heating flow connected to on a mid-position valve?
A
B
AB
BA
Identify the type of heating system shown in the image below.
Open vented S-plan system
Sealed S-plan system
Open vented Y-plan system
Sealed Y-plan system
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
Which one of the following types of valve would you commonly find in a Y-plan system with no bypass?
Three-port diverter valve
Zone valve
Two-port valves
Three-port mid-position valve
Separate space heating zones are required in dwellings where the floor area is greater than…
150m²
180m²
200m²
500m²
The main reason a radiator should be installed 150mm 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
An automatic air vent should be positioned at the…
Highest part of the system
Lowest point of the system
Point where the vent enters the system
Point where the cold feed enters the system
Which one of the following central heating systems uses a manifold?
One-pipe system
Two-pipe system
Microbore system
Gravity pipe system
Which of the following entries best describes the installation in the image below?
Combination boiler with Y-plan system
System boiler with Y-plan system
Traditional boiler with S-plan system
Open vented boiler with Y-plan system
An automatic bypass valve is activated by which of the following?
Boiler shutting off
Programmer being switched on
Pressure created within the system
Pressure of the incoming water service
The minimum size for an open vent pipe is…
15mm
22mm
28mm
35mm
A pump should be positioned so that the heating system is operating under…
No pressure
Positive pressure
Negative pressure
Both positive and negative pressures
