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WorksheetsCentral Heating 6035-02 | Part 3
Total questions: 40
Worksheet time: 20mins
At what temperature does the boiler thermostat shut the boiler down at to prevent overheating?
60°C
65°C
75°C
85°C
What british standard covers the maufacture of radiators?
BS EN 12828
BS 4422
BS EN 14336
BS 6700
What care needs to be taken when in older properties where horsehair/felt lagging due to?
The insulation may have worn away
The insulation does not comply with Building Regs
The insulation is flammable
The insulation could need replacing
What is the component shown here?
Pump flange
Reducing coupling
Female to male cylinder connector
Washing machine valve
Which British Standanrd covers preparation, commissioning and maintenance of domestic heating and cooling water systems?
BS EN 442
BS EN 12828
BS 7593
BS EN 14336
Under Building Regulations part L, what SEDBUK rating must condensing boilers be to be fitted?
Rated A
Rated B
Rated C
Rated D
What is the component shown?
Programmer
Cylinder thermostat
Room thermostat
Thermostatic radiator valve
What needs installing to allow the system to discharge pressure to a safe location if required?
Temperature relief valve
Pressure relief valve
Pressure reducing valve
Double check valve
What is the required temperature difference between the primary flow and primary return?
5°C
10°C
15°C
20°C
Which of the following materials are column radiators not made of?
Cast iron
Steel
Aluminium
Polyethylene
Which of the following is a combination boiler?
What is the component shown?
Immersion thermostat
Surrey flange
Room thermostat
Cylinder thermostat
Why was the 'one pipe gravity system' considered cheaper to install?
Fewer radiators would be installed on the system
Less pipework as the flow and return ran off of the same pipe
The system did not require any additional maintenance, i.e pumps
The system did not need a boiler to function
STATEMENT: If a property is over 150m² an additional heating zone valve should be fitted, allowing independent control of upstairs and downstairs.
True
False
What is the component shown?
Manifold
4-way coupling
Continous tee fitting
Plastic to copper connector
STATEMENT: The feed & expansion cistern operates on a sealed system.
True
False
Solid fuel boilers that need a convection current have a pipe size of what on the primary circuit?
15mm
22mm
28mm
35mm
Which of the following are NOT controls located on a pumped central heating system?
Timer
Boiler thermostat
Tundish
Room thermostat
What is the component shown?
Two-port zone valve
Three-port mid-position valve
Automatic bypass valve
Thermostatic radiator valve
The fan convector uses low-volume electric fan, which is operated by the heat exchanger warming up. These emitters can?
Heat up larger areas quickly
Be installed under kitchen units
Produce a low surface temperature suitable for nurseries
Be installed instead of skirting boards
Define what a boiler thermostat does.
it controls the flow of water to both heating and hot water circuits
It is used to set the temperature for a specific room
It governs the temperature of the hot water in the cylinder
It governs the temperature of the primary water
What pipe must the circulator be drawing from?
Cold feed pipe
Cold distribution pipe
Hot feed pipe
Hot distribution pipe
STATEMENT: An open fire gives heat in one room but central heating can give heat in every room.
True
False
Why could an inhibitor not be used on a system with a direct single feed cylinder?
The air lock would be lost due to the system being pumped
The F&E cistern would not be able to keep the correct system pressure
The heat exchanger (coil) would sustain damage due to the pump
All of the above
Counting the number of full turns it takes to close the lock shield valves from the open position is important beacause?
Correct balancing of the system
Correct draining of the system
Prevent backflow within the flow pipe
To ensure you can tell if the customer has tampered with valves
Building regulations cover conservation of fuel and power in new buildings, other than dwellings in which section of part L?
Part L1a
Part L1b
Part L2a
Part L2b
STATEMENT: Fully pumped systems offer better control, design and boiler type. Also the boiler position no longer needs to be lower than the cylinder.
True
False
To ensure there is no accidental turning on of the system, what should be done to any electrical components?
Removed from the system
Left on to ensure a constant circuit
Signage on the system only
Safe isolation procedure
Which of the following is a disadvantage of having underfloor heating?
Lower temperature for operation
High component costs
Suited to ground source heat pumps
Suited to solar systems
Which of the following is most common with the grills factory fitted to the radiators?
Rolled top
Compact
Seam top
Which of the following could be used to measure the temperatures of the flow and return pipes?
Room thermostat
Cylinder thermostat
Boiler thermostat
Clip-on thermostat
The minimum that the F&E should be located above the circulator is?
450mm
500mm
750mm
1000mm
What is the component shown here?
Panel radiator
Fan convector
Skirting convector
Kickspace heater
The three port mid-position valve is labeled with AB, A and B. But what is the A for?
Flow for the boiler
Hot water
Central heating
The clipping distances for 15mm copper is?
Horizontal - 1.2m, Vertical - 1.8m
Horizontal - 1.8m, Vertical - 2.4m
Horizontal - 2.4m, Vertical - 3.0m
Horizontal - 0.5m, Vertical - 0.8m
The method of heating shown here is?
Underfloor heating
Skirting convector
Kickspace heater
Low surface temperature heater
Before replacing the component shown, what must be done?
Drain the whole system down
Close the zone valves
Safe isolation procedure
Drain the primary water down
Which of the following fuels is supplied by national grid and does not need to be delivered by a private supplier?
LPG
Oil
Natural gas
Solid fuel
Before a combination boiler is to be installed, what needs to be checked?
The area of the property
The storage size capabilities
The water usage within the property
The properties incoming pressure and flow rates
What is the component shown?
Pressure relief valve
Pressure reducing valve
Wheel head valve
Automatic bypass valve
