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WorksheetsCentral Heating 6035-02 | Part 5
Total questions: 40
Worksheet time: 21mins
Which of the following cannot be a fuel type on a fully pumped system?
Natural gas
LPG
Oil
Solid fuel
If the installation does not follow the correct sequence and the circulator works under negative pressure, what will happen if air is drawn in to the system?
The system will have excess water
The system will corrode
The system will lack water
The system will require an additional circulator
Which of the following activates the hot water?
Cylinder thermostat
Room thermostat
Programmer
Boiler thermostat
Which of the following is used with light low carbon steel pipes?
Steam and fire systems
Heating and oil lines
Gas
Which of the following is supplied to the property via the national grid? (Choose 2)
Natural gas
LPG
Solid fuel
Electricity
Which of the following is NOT incorporated into a sealed system?
Expansion vessel
Filling connection
Filling loop
Feed & expansion cistern
Which of the following systems cannot achieve the customer’s desired comfort temperature when the outside temperature is -1°C?
Selective central heating
Background central heating
Full central heating
Which of the following tends to offer background heating?
Panel radiator
Fan convector
Skirting convector
Kickspace heater
What is the image shown?
School grading scale
Energy efficiency rating
SEDBUK rating
Due to resistance from pipework, fitings and/or types of bends, which of the following radiators is likely to stay cool within a system?
First radiator in the circuit
Third radiator in the circuit
Forth radiator in the circuit
Heat sink radiator in the circuit
What must be installed prior to the installation of the FOV to allow for any maintenance?
Single check valve
Double check valve
Full-way gate valve
Service valve
Which of the following jointing methods are not for a microbored manifold?
Compression
Push-fit
Soldered
Solvent weld
What is the component shown?
Automatic bypass valve
Thermostatic radiator valve head
Automatic air release valve
Circulator
In a situation in which the radiators TRV is covered by, e.g. long curtains or a sofa, what could be installed?
A remote head
A wheel head valve
A lockshield valve
None, move the obstructions (curtains/furniture)
What can be added via the F&E or a radiator to protect the central heating system?
Chemical inhibitor
Magnetic system cleaner
Anti-freeze
Pipe thermostat
STATEMENT: Although it is known as a 'Y-plan', it is also referred to as a 'mid-position valve'.
True
False
What would be an advantage of having a two pipe semi gravity with heat sink?
Heat control is restricted
Building Regulations part L compliant
Can only be used on open vented systems
Possibility for system to overheat
What would need to be added to the system if the property is over 150m²?
An additional service valve
An additional boiler
An additional heating zone valve
An additional cylinder
If a room thermostat is installed, it must not be on an outside wall. How far up the wall should it be situated?
1.5 metres
2 metres
3 metres
4.5 metres
Which of the following is an advantage to having underfloor heating?
Takes longer to heat up a room
Not suited for every situation
Even heat over the floor area
High installation costs
The colour of medium graded low carbon steel is labelled as?
Red
Blue
Brown
Yellow
Which of the following is NOT a disadvantage of the one pipe gravity system?
Non-compliant with Building regulation Part L
Uncontrolled room temperature
Cheap to install
Low efficiency boilers
What was a 'drawback' to having a one pipe gravity system installed?
Each heat emitter entered the main ring
As re-enters the main ring it would cool down the flow
Causing each radiator to be cooler than the one before
All of the above
Which of the following can be used to activate a two-port zone valve allowing circuits on either hot water or central heating? (Choose 2)
Expansion vessel
Circulator pump
Room thermostat
Cylinder thermostat
Which system is recommended for larger properties?
Y-plan
S-plan
W-plan
Where would the phial be attached to that indicated when the system is up to temperature?
Flow pipe of the boiler
Return pipe of the boiler
Open vent pipe of the F&E cistern
Hot distribution pipe
How far should the pipes connected to the hot water vessel, including the vent be insulated for?
0.45 metres
0.6 metres
0.8 metres
1 metre
The low surface temperature radiators are not accepted in which kind of building?
Nurseries
Homes for the elderly
Industrial factories
Schools
When installing an conventional boiler, which of the following components are included within the boiler?
Circulator
Automatic bypass valve
Expansion vessel
None, individual installations required
Which of the following boilers use two heat exchangers to heat up the latent heat within the system?
Condensing boilers
Traditional boilers
Convectional boilers
What should be placed on a TRV when decortating is scheduled to take place?
Wheel head valve
Lock shield cap
Decorators cap
Wheel head cap
The imporance of balancing the system is?
The radiators need to warm up uniformly
So the flow and return are not mistakenly installed backwards
To meet the required 20°C temperature difference between flow and return
All of the above
The three port mid-position valve is labeled with AB, A and B. But what is the B for?
Flow for the boiler
Hot water
Central heating
Which of the following can only be installed by Competent Persons?
17th edition IET
OFTEC
HETAS
All of the above
STATEMENT: The F&E should be located a minimum of 1 metre above the circulator.
True
False
You could install what alternative instead of an air separator?
Galvanic cell scale inhibitor
Line strainer
3-port zone valve
H frame configuration
Which of the following is used to safely discharge the excess pressure from the expansion vessel?
Automatic bypass valve
Pressure reducing valve
Pressure relief valve
Temperature relief valve
Which of the following reacts to ambient air temperature?
To prevent the possibility of back siphonage of central heating water into mains water, what is installed?
Single check valve
Expansion vessel
Double check valve
Filling loop
BS 1192 recognises the symbol shown here as?
Drain off valve
Single check valve
Automatic air vent
Radiator valve
