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WorksheetsCentral Heating L2 6035 Plumbing
Total questions: 60
Worksheet time: 37mins
What is the Image shown (a)
What is Delta T
Weight of the cistern
The pump speed
Room temperature divided by boiler temperature
The difference between the temperature of the radiator and the room
What is this (a)
Which radiator is a double panel double convector
Balancing a heating system requires you to adjust what (a)
Where is the neutral point
At the edge of the Klingon empire
Where the open vent connects to the circuit
Where the primary flow becomes the return
Where the cold feed connects to the circuit
The main problem with the one pipe system is that
They are prone to blockages
They can't be used in a bungalow
They are expensive to run
The earlier radiators pass cooler water back into the circuit
Wiring diagrams for the heating controls on a fully pumped system can be found in the (a)
The cold water supply to a fully pumped open vented central heating system should be
isolated at the
stop valve to the incoming cold water supply pipework
Gate valve on the cold feed pipework from the F & E cistern
service valve to the float operated valve to the CWS cistern
service valve to the float operated valve to the F & E cistern.
The cold water supply to a fully pumped open vented central heating system should be
isolated at the
stop valve to the incoming cold water supply pipework
Gate valve on the cold feed pipework from the F & E cistern
service valve to the float operated valve to the CWS cistern
service valve to the float operated valve to the F & E cistern.
Which one of the following gas boilers overcomes the need for a cold water storage cistern,feed and expansion cistern and hot water storage vessel? (a)
When positioning a single room thermostat, it’s recommended height from ground level is (a)
When setting the water level in a feed and expansion cistern, the allowance that should be
made for the expansion of water in the heating system is
4 %
6 %
10 %
1600 times its volume
If TRVs or zone valves on a system close, the purpose of the automatic by-pass valve is to
make sure that
water can flow through the cylinder
air cannot enter the heating system
water cannot pump over the vent
water can flow through the boiler
The recommended test pressure for a hydraulic test on a central heating system is
normal working pressure
1.5 times normal working pressure
twice the normal working pressure
3 bar pressure
Before isolating a heating system for the day, in cold weather, in a flat owned by an elderly
person, a plumber should
get on with the work as fast as possible
ensure that an alternative means of heating is available
only carry out the work if two plumbers are available
refuse to carry out the job at all costs.
Gas Boilers should be installed by someone registered with
Gas Safe
HETAS
OFTEC
Ofsted
Oil Fired Boilers should be installed by someone registered with
Gas Safe
HETAS
Ofsted
OFTEC
Solid Fuel Boilers should be installed by someone registered with
Gas Safe
OFTEC
Ofsted
HETAS
What is the image shown used for?
Clearing the pump
Venting the boiler interlock
Charging the radiators
Bleeding the radiators
What is this
TRV
Bypass valve
Thermostatic mixing valve
High temperature relief valve
The diameters of small bore pipework are:
8 and 10mm
15 and 22mm
28 and 35mm
below 42mm
What type of valve can you see here?
2 port zone valve
mid position valve
by pass valve
pump
Which valve can you see here?
mid position
by pass
wiring centre
2 port zone valve
What does this component do?
controls the hot water temperature
controls the room temperature
controls the boiler
none of the above
What type of system is this?
C plan
Y plan
S plan plus
S plan
What does this component do?
Joins all the CH components together
Stores the mcb's
Connects the boiler to the timeclock
None of the above
Name the component
pump valve
bypass valve
automatic air vent
expansion vessel
Name the component
expansion vessel
pump valve
bypass valve
circulating pump
What type of expansion vessel can you see?
diaphragm
balloon
pressure operated
bubble
Name the component
programmer
cylinder thermostat
boiler thermostat
room thermostat
name the component
pressure relief valve
manual air vent
automatic air vent
by pass valve
What type if radiator can you see?
single panel
double panel
double panel single convector
column radiator
name the component
wheel head radiator valve
thermostatic radiator valve
lock shield radiator valve
gate valve
Which document should be used for new domestic dwellings?
part L 1A
part L 1B
part L 2A
part L2B
What is this component used for?
connecting to taps
connecting cold water to a central heating system to fill
connecting to an expansion vessel
back flow prevention device
What kind of boiler can you see here?
system boiler
conventional boiler
combination boiler
thermal store
What component is pictured?
pump valve
gate valve
service valve
none of the above
Name the valve
radiator valve
drain off valve
combined radiator and drain off valve
wheel head valve
What building regulation covers central heating systems?
Part G
Part L
Part A
Part H
Information on heating system regulations can be found in?
Domestic heating compliance guide
The heating design guide
BSEN 806
The installation of heating guide
Heating systems are designed to reach temperature even when the outside temperature drops below?
0
-1
-5
-10
What is Background heating?
A type of heating you can't see
A heating system that can't achieve the desired temp at low outside temperatures
Any heating system using under floor heating
All of the above
A drawback to a one pipe system is?
It is expensive to install
The radiators get too hot
The return water travels to the following radiator
It needs 2 F&E cisterns
What is the purpose of a heat sink?
To provide a good source of hot water
To help control the heat in the boiler
To stop gravity circulation
To stop the heating getting cold
According to the building regulations all heating systems must be?
One pipe systems
Gravity systems
Fully pumped
Y plan systems
What is the purpose of a bypass
Prevent boiler lock out
Prolong the circulator life
Allow flow in the system when the radiators shut down
All of the above
A property above how many m2 should have more than 1 zone?
100 m2
150 m2
200 m2
250 m2
What is locking out?
A thermostat that shuts down the boiler if the flow is above 80
A thermostat that shuts down the boiler if the flow is above 85
A thermostat that shuts down the boiler if the flow is above 90
A thermostat that shuts down the boiler if the flow is above 95
A heating system not open to the atmosphere is know as a?
Un vented system
Mains feed system
Sealed system
Fully pumped system
Which one of the following should be fitted on either side of a central heating circular pump?
Drain valves
Check valves
Strainer valves
Isolation valves
What is the main tool that is required to bleed a heating system?
Allen Key
Radiator Key
Chuck key
Pump Screw
What type of central heating component is shown in the image?
Circulating Pump
Sump Pump
Double Pump
Pump
Which one of the following identifies the main reason for siting a radiator above a skirting board
To ensure adequate air circulation through the emitter
To reduce the risk of fire during installation
to make the skirting board easier to paint
To allow flooring to be easily fitted underneath
Which component is responsible for controlling the temperature of the water in a central heating system?
Programmer
Radiator valve
Room thermostat
Boiler thermostat
What is the main function of an expansion vessel in a sealed heating system?
To absorb the expansion of water as it heats up
To store hot water
To circulate water
To control the flow rate
Which type of valve is used to automatically regulate the flow of water to different zones in a central heating system?
Gate valve
Zone valve
Service valve
Pump valve
Which component is used to automatically remove air from a central heating system?
Bypass valve
Pressure relief valve
Automatic air vent
Expansion vessel
What is the primary function of a room thermostat in a heating system?
To control the boiler temperature
To operate the radiator valves
To regulate the room temperature
To control the hot water temperature
Which guide provides information on the installation standards for domestic heating systems?
The heating design guide
BSEN 806
Installation of heating guide
Domestic heating compliance guide
