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WorksheetsCentral Heating 6035-02 | Part 2
Total questions: 40
Worksheet time: 21mins
When the zone valves close, the boiler switches off and when the heat is dissipated from the heat exchanger, the circulator will switch off. This is known as?
Boiler interlock
Negative pressure
Positive pressure
Background heating
What is the component shown?
Boiler thermostat
Cylinder thermostat
Room thermostat
Programmer
The Water Regulations states that after the system has been charged, the filling loop needs to be?
Remain attached and on to keep the charge
Removed from the property to prohibit homeowner operation
Disconnected to prevent additional charges in the system
Remain attached in order for easy refill of system
STATEMENT: Boilers installed on any system must always be positioned lower than the systems clyinder.
True
False
Which component is included on a fully pumped Y-plan system that differentiates it from the S-plan system?
2 two port valves for hot water and heating
A three port valve
A bypass valve
The cylinder thermostat
Which of the following boilers use one heat exchanger to heat up the primary water, allowing the latent heat to be expelled to atmosphere?
Condensing boilers
Traditional boilers
Convectional boilers
STATEMENT: Unlike the two-port motorised valves, the three-port mid-position valve always allows a flow of water through the valve.
True
False
Which of the following is not a benefit to having underfloor heating installed?
Improved comfort
Flexibility
Very low maintenance
Pricey installation
What is the component shown?
Manifold
4-way coupling
Continuous tee fitting
Male iron to copper connection
To correctly balance the system, what should be worked out? (Choose 2)
How long the system takes to heat up
How many full turns it takes to heat up
How many radiators are in the system (plus 1)
What type of property the customer has
What would be a disadvantage to having a C plan two pipe semi gravity system installed?
No heat emitter is at lower temperatures
A faster heat-up time
Boilers in this system tend to be of a lower efficiency
L1b Building Regulation compliant
What can be avoided by the correct positioning of the circulator? (Choose 2)
Positive pressure
Circulator pumping over
Circulator drawing air in
Circulator pumping backwards
What is the component shown?
Filling loop
Flexible tap connector
Flexible service valve
Automatic bypass valve
Why is the position of the circulator pump important to produce positive pressure? (Choose 2)
To avoid air entering
To prevent positive pressure
To prevent a negative pressure
To prevent corrosion
The base of the F&E should be where compared to the CWSC?
The same base level as CWSC
Above the base level as CWSC
Below the base level as CWSC
What building regulation covers the conservation of fuel and power?
Part L
Part K
Part G
Part P
The component shown is on a two port motorised valve. What is the name of the component?
Sensor module
Boiler thermostat
Automatic air vent
Synchron motor
Which of the following is the wheel head valve?
Radiators without fins welded to the back of them rely heavily on what transfer of heat?
Convectional heat
Conductive heat
Radiated heat
The purpose of a frost thermostat and pipe thermostat is?
Tell' the boiler that the system is up to the correct temperature
Tell' the boiler to flow hot water through the pipes when they are frozen
Briefly activate the boiler to warm up pipe in vulnerable areas
Send a signal to the boiler that the temperature is close to overheating
STATEMENT: The position of the circulator does not matter as it produces negative pressure.
True
False
The minimum size of the open vent pipe is?
15mm
22mm
28mm
35mm
What type of heating system allows for some rooms in a property to be heated at the same time to a specific temperature?
Selective central heating
Background central heating
Full central heating
Specific central heating
A background central heating system cannot heat on the same levels as full or selective heating systems. What does the background central heating system do instead?
Heat the rooms hotter than desired
Heat the pipes up to stop them from freezing
Heat the rooms but at a lower temperature
Which of the following does the 'Y-plan' system NOT accommodate?
Full thermostatic control
Building Regulations part L compliant
Can be zone controlled
Can be used with system boilers
Building regulations cover conservation of fuel and power in existing dwellings in which section of part L?
Part L1a
Part L1b
Part L2a
Part L2b
Which of the following would require replacing if these indications are present: 1) Lukewarm water in radiators. 2) Raditaors not heating up correctly.
Essex flange
Float operative valve
Circulator pump
Surrey flange
What is the component shown?
Spray can freeze kit
Electric mains freezing kit
Hole saw set
Weir cup and pressure gauge set
The process shown here is?
Wiping any leaks from the flow pipe
Polishing the radiator
Covering any damage from the customer
Bleeding the radiator
How is the index radiator identified within the system?
The radiator that gets hottest quickest
The radiator that cools down first
The radiator that heats up last in the system
The radiator also known as 'heat sink'
What is the tool shown here?
Soft grip pliers
Adjustable pump pliers
Wide jaw adjustable spanner
Stillson wrench
Which of the following is not an advantage to using polybutylene pipes?
High temperature resistance
Low thermal expansion
Low noise transmission
High pressure resistance
When a circulator is removed, what can be placed in is place temporarily?
Another circulator
A short piece of LCS pipe
A piece of copper pipe
None of the above
Not only can a towel rail be used in a wet central heating system, but it can also run independently by?
It's own central heating circuit
Recycling bath hot water through the circuit
An electrical element
Turning on when the light is on
Which installation is a space saver as the circulator, automatic bypass and an expansion vessel are included within the installation?
Conventional gas boiler
System gas boiler
Gas combination boiler
Unvented cylinder
Of the following, where would a programmer be commonly situated?
Front/Living room
Kitchen
In the hallway
Near the front door
What type of heating system allows all rooms in a property to be heated at the same time to a specific temperature?
Selective central heating
Background central heating
Full central heating
Specific central heating
Of the following, which type of system would a pumped central heating system generally be?
Two pipe system with circulator
One pipe system with strainer
Two pipe semi gravity
C plan plus system
Which of the following can be connection methods for radiator valves? (Choose 2)
TTOE - Top, Top, Opposite Ends
BBOE - Bottom, Bottom, Opposite Ends
TBOE - Top, Bottom, Opposite Ends
TTSE - Top, Top, Same Ends
Which of the following is a system boiler?
