WorksheetsCentral Heating MEGA QUIZ 2
Total questions: 67
Worksheet time: 34mins
In a two pipe central heating system?
The flow and return water mixes
The flow and return water is kept separate
The flow and return water is at the same temperature
Flow water is at a lower temperature than the return water
The boiler position can be higher than the hot water cylinder in a?
System with microbore heating with gravity primaries
Combined hot water and heating system with vented primaries
Fully pumped sealed system
One pipe gravity system
This symbol from BS 1192 indicates a C/H component. Where in a C/H system would this be found?
The primary flow to the hot water cylinder
Immediately after the circulator and before the zone valve
On a sealed system filling loop
Cold feed from the feed and expansion cistern
What component allows the customer independent control of the H/W and central heating system?
Room thermostat
Programmer
Three port mid-position valve
Cylinder thermostat
Which of the following assists in the removal of flux from central heating pipework?
Adding an inhibitor to the system after commissioning
Set the working temperature of the system to a max of 65°C
Flushing the system out prior to the handover
Set the circulator to max for 1 hour after soundness testing
Downstairs radiators are cold and the upstairs radiators are only lukewarm. Caused by a faulty?
Three port mid-position valve
Circulator
Room thermostat
Boiler
Hot water circulates to each radiator by gravity in which of the following systems?
One pipe system
Fully pumped system
Microbore system
Two pipe reverse system
A zone valve in an S plan central heating system is designed to?
Allow the central heating system never to reach 100°C
Stop circulator noise from entering the C/H system
Prevent the flow and return waters from mixing
Isolate the central heating circuit when there is no demand
The main objective of installing a central heating system in a property is?
To allow customer control of timings
To conserve fuel
Thermal comfort
To fully heat a property up to 18°C
Installing a C/H system using polybutylene pipe, the most common jointing method used is?
End feed solder fittings
Push fit fittings
Solvent welded fittings
Compression type A fittings
Which Building Regulation covers the energy efficiency requirements for C/H systems?
L1
P
6700
H
One advantage of installing a fully pumped central heating system is?
It allows each room to be heated to a regulated temperature
It is cheap to install
It controls the heat recovery time economically
There is no danger of overheating
The type of copper commonly used in the installation of C/H systems in domestic properties is?
R290 hard
R250 half hard
R220 half hard
R290 soft coils
In which of the following situations is it important to insulate central heating pipework?
Loft area and under the suspended timber floor downstairs
From the boiler to the index radiator
Any run of pipework over 3 metres in length, as per BS 12328
Bathroom and north facing kitchen
Identify one advantage of underfloor heating?
Cheap and easy to install
No requirement for balancing the system
Does not need to be fully pumped
Even spread of heat in each room
Where would the air vents be located on a central heating system?
Immediately above the circulator
Just prior to each zone valve
At the top of every radiator
On the cold feed to the air separator
The temperature of the last radiator on the circuit will be cooler than the first radiator when
It's a two pipe system
It's a one pipe system
It's a two pipe reverse return system
It's a Microbore system
What is the normal size of an open vent pipe to a fully pumped heating system?
10 mm
28 mm
22 mm
15 mm
An open vent pipe and a cold feed pipe, can be connected to a fully pumped system using?
an automatic air vent
an injector tee
an air separator
a diverter valve
A zone valve in a pumped heating circuit is designed to?
isolate the circuit when the desired temperature is reached
permit the system to be heated to temperatures above 100°C
prevent water from the flow and return pipes mixing
stop the pump vibrating on its fixing mountings
The main purpose of the vent pipe installed on a heating circuit is to?
fill the system with water
introduce air into the system
protect the system in the event of over-heating
provide hot water to the feed and expansion cistern
Which one of the following components is indicated by the British Standard symbol shown?
Air Inlet Valve
Draining Valve
Double Check Valve Assembly
Pressure Relief Valve
Which one of the following components is indicated by the British Standard symbol shown?
Drain off valve
Air Inlet Valve
Servicing Valve
Pressure Relief Valve
A mid position diverter valve?
provides priority circulation to the hot water circuit
provides priority circulation to the heating circuit
feeds both the hot water and heating circuits simultaneously
is used to discharge water from the system if it overheats
When fitting thermostatic radiator valves (TRV), a general principle to follow is that?
all radiators should have TRV's
at least one radiator should be fitted without a TRV
only rads on the first floor should be fitted with TRV's
only rads on the ground floor should be fitted with TRV's
Which one of the following can be fitted with a remote sensor?
Diverter valve
Thermostatic radiator valve
Motorised valve
Solenoid valve
An anti-gravity valve would be fitted in a?
pipeline where air was being drawn into a system
pipeline in which unwanted circulation was occurring
cold feed pipe to stop water backing up
vent pipe on a fully vented system
Which one of the following components would be strapped to a hot water storage cylinder?
Programmer
Automatic air release
Thermostat
Motorised valve
Before filling a central heating system for the first time, it is advisable to?
turn the pump on to assist with the filling process
ensure that all rad valves are left in the closed position
remove the pump (accelerator) and replace with piping
remove all rads and replace with a piece of temporary piping
Which one of the following assists in the removal of flux from heating systems pipework?
Installing all pipes with a fall away from the drain valves
Setting the working system temperature above 60°C
Hot flushing a system as part of the commissioning process
Adding soap solution to the system after testing
Combination boilers are designed to?
work with two different fuels at the same time
provide domestic hot water and hot water heating
provide hot water from a storage cylinder and H/W heating
provide H/W heating only, through any type of heat emitter
When fully draining down a heating system?
the radiator valves should be closed
the air vents should be opened
the open vent pipe should be capped
all the air vents should be closed
Which one of the following heating components may have a replaceable gland packing?
Zone valve
Thermostatic radiator valve
Central heating pump
Automatic air release
The main reason for specifying the component shown is to?
Prevent reverse circulation in the gravity primary flow pipe
Allow the primary return to be connected to the pump
Permit the pump to be installed on the pumped primary return
Allow the cold feed and vent pipe to be closely grouped
The statutory requirements for space heating systems controls are covered by?
The Construction Regulations
The Building Regulations
The Water Regulations
British Standards
Wiring diagrams for the heating controls on a fully pumped system can be found in the?
NICEIC standards
Wiring Regulations
Manufacturer's Instructions
British Standards
The main advantage of a one pipe system compared to a two pipe system, is that it?
can run at higher temperatures
requires a much smaller pump
is generally quicker to install
uses smaller diameter pipework
The CW supply to a fully pumped open vented central heating system should be isolated at the?
stop valve to the incoming cold water supply pipework
fullway valve on the cold feed pipework from the F&E cistern
service valve to the float operated valve to the F&E cistern
service valve to the float operated valve to the CWS cistern
This is a diagram of an air separator. The cold feed should be connected to point?
A
B
C
D
This is a diagram of an air separator. The expansion pipe should be connected to point?
A
B
C
D
The primary vent pipe on a central heating system, should always discharge over the?
cold feed cistern
cold water storage cistern
safety valve outlet
feed and expansion cistern
The main reason for the space between the top of a rad and an overhanging window sill is to?
provide space for access with a vacuum cleaner
provide adequate clearance for heat circulation
allow the window sill to be easily removed
allow the window sill to be easily painted
When positioning a single room thermostat, it’s recommended height from ground level is?
1.5 m
3.0 m
2.5 m
1.0 m
One purpose of the primary open vent on a central heating system is to?
provide a safety outlet should the pressure vessel fail
ensure that the system is kept at atmospheric pressure
reduce system pressure and thus increase pump speed
increase system pressure and thus reduce pump speed
The recommended test pressure for a hydraulic test on a central heating system is?
1.5 times normal working pressure
normal working pressure
3 bar pressure
twice the normal working pressure
The most efficient way of draining a single rad when removing it from the first floor is to?
drain down the system as far as the first floor
completely drain down the whole of the system
isolate the valves and drain down the radiator
use freezing equipment on the pipes to the valves
Details of the heat output for a specific heat emitter, can be found in?
the British Standards
the WRAS Guide
manufacturer's brochures
the Building Regulations
A disadvantage of using a one pipe heating system, is that?
It is not possible to use thermostatic radiator valves
The central heating pump must always be on the return
The last radiator has a lower temperature than the first
The pipework to the radiator valve must always be 22 mm
Filling an open vented central heating system would be carried out through?
The cold feed from the feed and expansion cistern
A flexible connection from the incoming water mains
The cold feed from the cold water storage cistern
A connection between the mains and drain off tap
The min size of open vent pipe used on a fully pumped H/S, in a small domestic property, is?
10 mm
15 mm
22 mm
22 mm
A 3 port valve, programmer, room thermostat, cylinder thermostat, and TRVs would be used on a?
Pumped heating and gravity hot water for a two pipe system
Pumped heating and gravity hot water for a one pipe system
Fully pumped H/S using a 3 port mid position zone valve
Fully gravity fed H/S using a 3 port mid position zone valve
On a fully pumped system, an automatic air release valve is usually installed at the?
Highest point on the pumped primary flow
Lowest point on the pumped primary return
Point where the open vent enters the F & E cistern
On the opposite end to the TRV on a radiator
Could you please provide the options list for the question?
Resistor
Radiator valve
Heated towel rail
Fuse
The vent pipe should be connected at point?
A
B
C
D
The main reason for sitting a radiator above the top of a skirting board is to?
Make the skirting board easier to paint
Ensure better air circulation
Reduce the risk of fire due to dust build up
Ensure easier cleaning
The recommended position of a cylinder thermostat from the base of the cylinder is?
¼ height up
⅓ height up
½ height up
¾ height up
What type of panel radiator is A?
Single panel
Single panel with fins
Double panel
Double panel with fins
What type of panel radiator is B?
Single panel
Single panel with fins
Double panel
Double panel with fins
What type of panel radiator is C?
Single panel
Single panel with fins
Double panel
Double panel with fins
What type of panel radiator is D?
Single panel
Single panel with fins
Double panel
Double panel with single fins
What type of panel radiator is?
Single panel
Single panel with fins
Double panel with double fins
Double panel with single fins
What is this fitting used for?
Single separator
Thermostatic collector
Manual separator
Automatic Air Vent
What is this fitting used for?
Three-port separator
Three-port thermostatic controller
Three-port diverter valve
Three-port manual separator
What is this fitting used for?
Filling up the heating system
Pressurising the CWSC
Pressurising the HWSC
Filling up the hot water system
What is the fitting A used for?
Preventing backflow
Stopping the flow of water
To control the temperature
Filling up the central heating system
What is the fitting B used for?
Preventing backflow
Stopping the flow of water
To control the temperature
Filling up the central heating system
What is the fitting C used for?
Preventing backflow
Stopping the flow of water
To control the temperature
Filling up the central heating system
