WorksheetsPhase 1 Central Heating checkpoint test
Total questions: 40
Worksheet time: 21mins
What heating system uses a difference in the density of water to circulate heat to a hot water cylinder?
Y plan
Gravity fed
S plan+
Hypocaust
The conservation of fuel and energy is covered by which approved document?
Building regulations part P
Building regulations part M
Building regulations part H
Building regulations part L
What is the main purpose of a central heating system?
To heat up the core of the building
To provide thermal comfort to a property
To supply heating to a single room
To provide heat to a number of properties
What is at the highest point of a vented heating system?
Expansion vessel
Feed and expansion cistern
Cold feed isolation valve
Automatic air vent
What is the primary function of the open vent on a central heating system?
To allow the system to pressurise
To allow the system to operate at atmospheric pressure
To provide sufficient oxygen to the heating system
To provide a means of ventilation when filling the system
What type of heating system incorporates a three-port valve that gives priority to the hot water system?
S plan
S plan+
Y plan
W plan
What three components are required when converting an open vented system with a sealed system?
Automatic air vent, low loss header, filling loop
Filling loop, expansion vessel, pressure gauge
Pressure relief valve, filling loop, expansion vessel
Expansion vessel, automatic air vent, pressure gauge
What is the name of the component?
Mixer bar
Low loss header
Microbore manifold
Filling loop
What type of heating system charges using low-cost off-peak tariffs?
District
Electric storage
Y plan
Warm air
What type of heating system can be split into zones that serve a cluster of houses and buildings?
District
Underfloor
Microbore
Thermosyphon
This allows all rooms in a property to be heated at the same time to a specific temperature set by the customer. This internal comfort temperature must be reached even when the outside temperature is between -1ºC and -5ºC, depending on the location of the property within the British isles.
Full central heating
Selective central heating
Background central heating
Gravity central heating
A heating system that incorporates a central heating circulator located on the return pipework causing the system to run at negative pressure.
Full gravity
Semi gravity 1 pipe
Semi gravity 2 pipe
Fully pumped
Single feed or Primatic hot water cylinders are old and rarely seen now, but still in use in some older properties. This type of cylinder had some serious drawbacks. Select all appropriate answers from the list below.
There is no F&E to fill the primary circuit; this is done via the cold feed to the cylinder and the boiler.
No inhibitor can be added to this type of heating system.
It is a gravity only system and cannot be converted to pumped or the air lock; separating the two waters will be lost.
This system used a separate CWSC and F&E cistern to supply the water which involved more pipework and components leading to additional costs.
Identify the system in the image.
1 pipe semi gravity
Full gravity
2 pipe semi gravity
Fully pumped
Identify the system in the image.
1 pipe semi gravity
Full gravity
2 pipe semi gravity
Fully pumped
According to building regulation Part L, what is the minimum acceptable compliant system?
Y plan
S plan
C plan plus
W plan
The C plan heating system is almost identical to the previous 2 pipe semi gravity but with the addition of 2 very important components. What two controls have been added?
Pressure relief, Tundish
Two port motorised valve, Cylinder stat
Temperature relief, Tundish
3 port motorised valve, Pipe line stat
What is the purpose of a heat leak radiator on a two pipe semi gravity system with solid fuel boiler?
The idea of the heat leak radiator is to allow any excess heat to disperse to the surrounding atmosphere and this will ensure at least a minimum amount of continued gravity circulation through the system.
The idea of the heat leak radiator is to allow any excess pressure to disperse to the surrounding atmosphere and this will ensure at least a minimum amount of continued gravity circulation through the system.
The idea of the heat leak radiator is to collect all heat generated by the boiler and contrate the warmth into one single room within the property.
The idea of the heat leak radiator is to provide somewhere to dry towels during the summer months when the central heating system is not likely to be in operation.
Solid fuel appliances are equally as controllable as gas and oil alternatives.
True
False
An example of a fully pumped system is the Y plan heating system. Select from the list below all the controls required to make a Y plan.
3 port diverter valve
3 port mid position valve
Cylinder thermostat
Room thermostat
Programmer
Identify the component in the image.
Room thermostat
Cylinder thermostat
Auto bypass valve
Programmer
Identify the component in the image.
Room thermostat
Cylinder thermostat
Auto bypass valve
Programmer
Identify the component in the image.
Central heating circulator
Blending valve
Auto bypass valve
Programmer
Identify the component in the image.
Room thermostat
Cylinder thermostat
Auto bypass valve
Programmer
Identify the component in the image.
Room thermostat
Cylinder thermostat
Auto bypass valve
Programmer
Identify the component in the image.
Motorised valve
Cylinder thermostat
Auto bypass valve
3 Port valve
Identify the component missing from the system in the image.
Auto bypass valve
3 port mid position valve
Circulator
Lockshield valve
What connection on a 3 three port mid position valve supplies hot water to the coil heat exchange in a HWC.
AB
A
B
Any connection will work
Where should the underfloor heating manifold be positioned in a property?
In a central location
Close to the boiler
Close to the cylinder
Close to the incoming cold water supply
What is boiler interlock?
A component fitted to a combination boiler to prevent tampering.
A method of joining two boilers together when a larger amount of heat output is required.
A configuration of wiring to prevent the boiler from firing when not needed.
A thermal cutout device on a boiler to prevent over heating.
Identify the underfloor heating pattern in the image.
Snail
Series
Worm
Delta
Identify the underfloor heating pattern in the image.
Snail
Series
Worm
Delta
The pressure relief valve on a domestic heating system will operate at what pressure?
1 bar
2 bar
3 bar
4 bar
A filling loop designed to fill a domestic heating system incorporates a means of back flow prevention to protect the mains water supply. What component within the valve prevents backflow?
Single check valve
Double check valve
RPZ valve
Isolation valve
What fluid category is primary water?
Cat 1
Cat 2
Cat 3
Cat 4
In a modern sealed central heating system incorporating a condensing type boiler, what is the expected temperate difference between the flow and return if designed correctly?
12 degrees
20 degrees
22 degrees
30 degrees
Building regulation L states that zoning of heating systems must be installed in all properties of a size equal to and greater than......
100 m2
150 m2
200 m2
250 m2
What component within the UFH manifold is responsible for maintaining a constant temperature of water?
Actuator heads
Flow regulators
Blending valve
Return thermometer
A major advantage to warm air heating systems is
Rapid heat up time
Compact units save space
Flexibility when locating the unit
1
CHP Combined Heat and Power boilers generate what?
Hot water and electricity
Gas and electricity
Hot water and gas
Electricity and gas
