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WorksheetsCentral Heating 6035-02 | Part 4
Total questions: 40
Worksheet time: 20mins
What is the 'main purpose' of central heating within a property?
Providing a means of thermal comfort
Heating up the primary circuit within the hot water system
Provide adequate heating for one specific room
To prevent other pipework within the property from freezing
What british standard covers the installation and commissioning of water based heating systems?
BS 8000
BS 4488
BS EN 12828
BS EN 14336
Benefits of having a air separator is? (Choose 2)
Reduced noise in system
Prevents limescale
Lower risk of corrosion
Lower risk of debris in system
Which Building Regulation covers the heat producing appliances?
Part J
Part K
Part L
Part P
Why is an automatic bypass valve included on a Y-plan and S-plan system?
Allow water to flow through boiler when the circuits close down
Bypassing pressure preventing the system from a "lock out"
It prolongs the circulators lifespan
All of the above
The three port diverter valves are commonly found in combination boilers and some older systems. What is the system plan known as?
S-plan
Y-plan
Z-plan
W-plan
Approximately how far away from the heat source is the room thermostat situated?
1.5 metres
2 metres
3 metres
4.5 metres
Saving on such things as energy and fuel bills, along with producing less CO² emissions are all beneficial factors to having?
The correct clipping distances
The correct insulation
The correct pipe sizes
All of the above
STATEMENT: The sealed system in not open to atmosphere and incorporates a sealed expansion vessel.
True
False
What system is fed directly from the mains and incorporates an expansion vessel capable of taking up any expansion within the system?
Low pressure, open vented system
Sealed, pressureised system
What is the component shown here?
3-port motorised valve
2-port motorised valve
Electrical-lever service valve
Electrical scale inhibitor
Which of the following is an advantage to having the two pipe semi gravity system installed?
Uncontrolled heat throughout the system
All heat emitters reach the same temperature
The system does not comply with Building Regulations part L
The boilers connected to these systems are of low efficiency
Which of the following were defining factors to why the full gravity systems are no longer installed today?
Incorrect fall in pipework would cause the system to not work properly
Longer heat-up times compared to 'newer' systems
The system did not run off of any pumps
All of the above
What is the British Standard for the specification for radiators and convectors?
BS EN 442
BS 4422
BS 6700
BS EN 14336
The colour of light graded low carbon steel is labelled as?
Yellow
Brown
Blue
Red
Which of the following is an advantage of the condensing boilers?
Higher maintenance
Disposal of acid condensate
Part L compliant
Uses more gas out of 'condensate mode'
The three port mid-position valve is labeled with AB, A and B. But what is the AB for?
Flow for the boiler
Hot water
Central heating
What is the minimum height the open vent must rise above the water level on the F&E?
350mm
400mm
450mm
500mm
BS 1192 recognises the symbol shown here as?
Drain off valve
Single check valve
Automatic air vent
Radiator valve
Which of the following is for the engineer to balance the system on a radiator?
Wheel head valve
Thermostatic radiator valve
Lock shield valve
What is the component shown?
Radiator key
Radiator valve spanner
Radiator bleed key
Allen key
The Thermostatic radiator valve reacts to what to close off the valve when the system is up to the correct heat?
Background heat temperature
Latent heat temperature
Passive heat temperature
Ambient air temperature
The skirting convector has a finned copper heat exchanger but relies on what?
A natural convection, offering background heating
A larger area to heat properly
A kitchen unit to have a grill mounted on the kick plinth
The property to be planned for a retro-fit before being installed
STATEMENT: Depending the temperature of water flowing through plastic pipework will determine how far apart the clipping distances are. The hotter the water, the closer the clips.
True
False
Which of the following is the lock shield valve?
Which of the following is described as, allows the heated water in the system to expand and operate at atmospheric pressure.
Cold water storage cistern
Feed and expansion cistern
Combination unit
Unvented cylinder
What is the cause for the iron oxidating within the central heating system?
Aeration occuring in the system
Electrolytic corrosion occurring
The boiler reaching extreme temperatures
The system having a leak occur within the heat exchanger(coil)
What component is described as, to allow close proximity/close coupled pipework when positioning the cold feed and vent pipe.
Galvanic cell scale inhibitor
Line strainer
Air separator
Circulator
The 'neutral point' of a H frame is at the base of the cold feed pipe from the F&E cistern. How far from the open vent pipe is the 'neutral point'?
100mm
150mm
300mm
450mm
What is situated one-third of the way up a hot water cylinder?
Immersion heater
Essex flange
Surrey flange
Cylinder thermostat
What is the component shown?
Galvanic cell scale inhibitor
Boiler thermostat
Chemical inhibitor
Magnetic system cleaner
What height do manufacturers recommend that radiators should be fitted?
150mm from floor height
200mm from floor height
250mm from floor height
300mm from floor height
Half hard straight lengths are what grade of copper?
R220
R250
R290
Which of the following is used with heavy low carbon steel pipes?
Steam and fire systems
Heating and oil lines
Gas
The dry side of the expansion vessel's rubber membrane is charged through a schrader valve to what pressure?
60psi
1bar
1.5bar
2bar
STATEMENT: The solid fuel used on a two pipe semi gravity with heat sink are more controllable than boilers using gas or oil.
True
False
Of the following, which is NOT an advantage to having a C plan two pipe semi gravity system?
Boilers fitted to this system can tend to be a lower efficiency
There is full control for both heating and hot water
Each heat emitters reach the same temperature
The system is compliant with Building Regulations L1b
The condensing boilers allow gases to pass over a second heat exchanger, cooling to what temperature?
45°C
50°C
55°C
60°C
The phrase used for how plumbers/engineers balance the central heating system is known as?
Level radiator method
Balance radiator method
Rule of thumb method
Efficiency saver method
What type of insulation is shown here?
Foil wrapped
Flexible polyethylene
Felt lagging
Polyisocyanurate foam
