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WorksheetsCentral Heating 6035-02 | Part 6
Total questions: 40
Worksheet time: 21mins
To be compliant with Building Regulations part L, what type of oil boiler now needs to be installed?
Combination boiler
Condensing oil boiler
System oil boiler
Conventional oil boiler
Soft coiled microbore pipes are what grade of copper?
R220
R250
R290
STATEMENT: A programmer often has a 'boost' or 'override' button to allow the system to operate outside of the programmed timings.
True
False
What term describes, the termostat shuts the boiler down if it detects a flow above 85°C, stopping it from overheating.
Locking out
Aeration
Bypass
Zonal control
The pipe that should be connected to this air separator at point A is?
Open vent pipe
Flow to the system
Flow from the boiler
Return from the boiler
Which of the following is a disadvantage of the condensing boilers?
Disposal of acid condensate
Quiet in operation
High efficiency
Part L compliant
In what appliance is a diverter valve commonly found?
Unvented cylinder
F&E cistern
Combination boiler
Hot water cylinder
What is the component shown?
Radiator key
Radiator valve spanner
Radiator bleed key
Allen key
STATEMENT: Just like the F&E cistern, the CWSC operates at atmospheric pressure due to the open vent pipe.
True
False
Of the following locations, where would the air vents be located on a central heating system?
Immediately above the circulator
At the top of every radiator
Just prior to each zone valve
On the cold feed to the air separator
What type of protection does the filling loop offer regarding protecting mains water?
Single check valve
Double check valve
RPZ valve
Air gap
Upon switching off the fused spur, what else should be done to ensure a safe isolation? (Choose 2)
Removal of the fuse
Flushing the system
Locking off the fuse holder
Fill the system
Which of the following is NOT an advantage of the two pipe semi gravity system?
Uncontrolled heat throughout the system
All heat emitters reach the same temperature
It is cheaper to run
Being a two pipe system, it is quicker to heat up
STATEMENT: The biggest cause of corrosion within a central heating system is aeration throughout the system.
True
False
The expansion vessel is used on a sealed system to take up the expansion of heated water. What is the percentage of water expansion?
2%
4%
15%
1600%
Which of the following is commonly found with the top and side grills an optional availability on radiators?
Rolled top
Compact
Seam top
Which British Standard covers preparation, commissioning and maintenance of domestic heating and cooling water systems?
BS EN 442
BS EN 12828
BS 7593
BS EN 14336
How efficient is SEDBUK rated B boiler?
10-15%
50-55%
86-90%
90-99%
Approximately how much of the heat is convected via the fins welded to the back of the radiators?
50%
70%
85%
100%
Which of the following require TRVs to be fitted on central heating systems? (Choose 2)
Building Regs part L
Compliant Persons Certificate
Heating Compliance Guide
Building Regs part G
What system is fed from the F&E cistern which is located at a high level and can be fully pumped or gravity fed?
Low pressure, open vented system
Sealed, pressurised system
What is the common size of the feed & expansion cistern?
18 litres
26 litres
50 litres
100 litres
What tool is used to secure radiator valves in position?
Radiator bleed key
Adjustable spanner
Radiator key
Stillson wrench
Building Regulations state that which of the following radiators should not contain a TRV?
The radiator in the same room as the room stat
The radiator that has been identified as 'index radiator'
The radiator that is located in the customers "decorator room"
All of the above
What is the component shown here?
Panel radiator
Fan convector
Skirting convector
Kickspace heater
The purpose of insulation around vulnerable areas is to? (Select 3)
Stop cold getting to the pipe
Stop heat leaving the pipe
Stop heat transferring
Stop leaks from occuring
What is the 'main purpose' of central heating within a property?
Providing a means of thermal comfort
Heating up the primary circuit within the hot water system
Provide adequate heating for one specific room
To prevent other pipework within the property from freezing
What would be the Delta T temperature between a system with a flow temperature of 60°C, a return temperature of 40°C, and an ambient air temperature of 20°C?
10°C
20°C
25°C
30°C
Commercial insulation uses what material around the insulation to deflect heat or coldness?
Lead
Foil
Asbestos
Copper
Which of the following could be used to measure the temperatures of the flow and return pipes?
Digital thermostat
Boiler thermostat
Room thermostat
Cylinder thermostat
If maintenance is required on a circulator pump, what is closed to allow the pump to be removed without draining the system?
The cold feed gate valve
The F&E service valve
The pump flanges
The mains stop valve
Which of the following can be caused by aeation within the heating system?
Iron oxide producing magnetite
System noise being heard
The circulator can be burned out
All of the above
STATEMENT: The C plan two pipe semi gravity system was outdated by its predecessor, the two pipe semi gravity system.
True
False
What are the clipping distances for polybutylene when water at 60°C is plumbed to pass through 15mm?
Horizontal - 1.2m, Vertical - 1.8m
Horizontal - 2.4m, Vertical - 3.0m
Horizontal - 0.6m, Vertical - 1.0m
Horizontal - 0.4m, Vertical - 0.6m
The connection method for pipework to radiators that is rarely found today, except on some one-pipe systems is?
TBSE : Top-Bottom-Same Ends
BBOE : Bottom-Bottom-Opposite Ends
TTOE : Top-Top-Opposite Ends
TBOE : Top -Bottom-Opposite Ends
STATEMENT: An open fire provides just as much heat throughout a property as a central heating system.
True
False
Which of the following is installed on a fully pumped system to control the circulation of heated water?
Cylinder stat
Room stat
Zone valves
All of the above
What is the maximum temperature that the cylinder thermostat is commonly set to?
48°C
60°C
65°C
80°C
STATEMENT: The more columns that a column radiator has, the greater the heat output.
True
False
What is the component shown?
Panel radiator
Low surface temperature radiator
Skirting convector
Kickspace heater
