Worksheets6035 Central Heating Revision
Total questions: 48
Worksheet time: 27mins
Which regulation covers the conservation of fuel and power in new dwellings (homes)?
L1a
L1b
L2a
L2b
What is the main purpose of Central Heating?
To heat water
To maintain thermal comfort
To cool rooms
To generate electricity
Fill in the blank: BS EN 12828 is related to the ________ and installation of water based central heating systems.
design
maintenance
operation
inspection
Which type of central heating system heats all rooms at the same time to a specific temperature?
Selective Heating
Full Central Heating System
Background Heating
Sealed System
Selective Heating means some rooms will be heated at different times.
True
False
Background Heating means all rooms will heat up at the same time but at a lower temperature.
True
False
Which system uses a filling loop with a double check valve and requires an expansion vessel and PRV as safety devices?
Sealed System
One Pipe System
Two Pipe System
S Plan System
Mainly Combi boilers are fitted in which type of system?
Sealed System
One Pipe System
Two Pipe System
Y Plan System
Fill in the blank: The last radiator in a One Pipe System is generally a lot ________ than the others.
colder
hotter
noisier
larger
Which system uses separate flow and return pipes to each radiator for more uniform heating?
One Pipe System
Two Pipe System
S Plan System
Y Plan System
The S Plan system contains two port valves. One controls the supply to Hot Water and the other to Central Heating.
True
False
The Y Plan system uses a three port mid position valve to control the supply of water to both Hot Water and Central Heating systems.
True
False
Identify the valve shown in the first image:
Two Port Diverter Valve
Gate Valve
Ball Valve
Butterfly Valve
Identify the valve shown in the second image:
Three Port Mid Position Valve
Two Port Valve
Zone Valve
Diverter Valve
In the diagram, what does 'A' represent?
Flow from Boiler
Flow to Central Heating
Flow to Hot Water
In the diagram, what does 'B' represent?
Flow from Boiler
Flow to Central Heating
Flow to Hot Water
What is the main reason Plastic Pressure Barrier Pipe (Polybutylene) is used for installation of Central Heating Pipework?
Cost
Speed
Durability
Flexibility
Which type of insulation is mentioned for central heating pipework?
Expanded Rubber Nitrile
Glass Wool
Polyurethane Foam
Mineral Wool
Feed & Expansion Cistern is a ______ litre tank which supplies the central heating circuit with water when required.
18
10
25
50
What is the function of an Air Separator in a central heating system?
To heat water
To allow close proximity positioning of the cold feed and vent pipe
To prevent rust
To expand water
Locking Out is a protection system within a boiler.
True
False
Aeration causes corrosion within a central heating system.
True
False
What does rust produce in a central heating system?
Magnetite
Copper oxide
Calcium carbonate
Iron sulfate
The positioning of the circulating pump in a central heating system is important.
True
False
Which diagram shows the system under negative pressure, pushing into the cistern?
What is the function of the Automatic Bypass Valve?
Releases built up pressure within a sealed system
Relieves system pressure built up by TRV’s allowing water to flow through the circulator to help prolong the life of the pump
Temporary connection used to pressurise a sealed system
Controls each radiator individually
Which valve is used to temporarily connect and pressurise a sealed system and fills via the cold main into the central heating circuit?
Pressure Relief Valve
Filling Loop
Lockshield Valve
Wheelhead Valve
The Pressure Relief Valve releases built up pressure within a sealed system.
True
False
Which control is used to set the temperature in a room?
Room Stat
Programmer
Cylinder Stat
The Programmer is a control device used in heating systems.
True
False
Fill in the blank: The ________ is used to control the temperature of the hot water cylinder.
Cylinder Stat
Thermostatic Valve
Pressure Switch
Flow Sensor
Fill in the blank: The Lockshield Valve is also known as the ________ Valve.
Engineers
Gate
Butterfly
Ball
What is the function of an Automatic Air Vent in a heating system?
To release water
To release air within the system
To increase pressure
To cool the system
Radiators (Pressed Steel) give off approximately ____% Convectional Heat and the remainder is Radiant Heat.
85%
60%
70%
95%
Which type of radiator is shown with a seam at the top?
Compact
Rolled Top
Seam Top
Colum Radiator
Identify the radiator type: This radiator is made of cast iron and has columns.
Compact
Colum Radiator
Towel Radiator
Rolled Top
Which radiator type is designed for hanging towels and has an inverted panel?
Towel Radiator
Towel Radiator with Inverted Panel Rad
Compact
Seam Top
Fill in the blank: The Compact radiator is shown in the image labeled _____
MYSON
BAXI
FERROLI
VAILLANT
Which tool is shown in the image labeled?
Radiator Valve Key
Radiator Bleed Key
Radiator Valve Spanner Key (Ratchet Type)
Screwdriver
Which tool is shown in the image labeled 'Radiator Valve Key'?
Radiator Valve Key
Radiator Bleed Key
Radiator Valve Spanner Key (Ratchet Type)
Hammer
Which tool is shown in the image labeled 'Radiator Bleed'?
Radiator Valve Key
Radiator Bleed Key
Radiator Valve Spanner Key (Ratchet Type)
Pliers
What is the first step in hanging a radiator? Fill in the blank: The first step is to ________.
Mark out location
Attach the radiator to the wall
Connect the pipes
Turn on the heating system
What is the correct valve arrangement for a radiator?
Top, Top Opposite Ends
Bottom, Bottom Opposite Ends (BBOE)
Side, Side Opposite Ends
Center, Center Opposite Ends
When commissioning a Central Heating System, all TRV’s should be set to ________.
Maximum
Minimum
Off
Midway
What does 'Delta T' refer to in heating systems?
A) The difference in temp between the mean radiator temp and the ambient temp of the room
B) The difference in temp between the floor and ceiling
C) The difference in temp between the inside and outside of the house
D) The difference in temp between two radiators
What is the purpose of Underfloor Heating? Fill in the blank: Underfloor Heating ensures ________.
even heat distribution
rapid cooling
uneven temperature zones
increased humidity
Kick Space Heater is typically used in which type of room?
Kitchen
Bedroom
Garage
Attic
Brackets have slots and holes. What is the purpose of the holes?
For temporary fixing
For permanent fixing
For decoration
For insulation
