WorksheetsMTL2 Central Heating Learner Outcome 9
Total questions: 18
Worksheet time: 9mins
What is the best way to minimise heating downtime for customers?
Drain the system early
Work without informing the customer
Carry out as much preparation work as possible before isolation
Increase boiler temperature
Why should final connections be made last when extending a system?
To reduce pipe length
To improve circulation
To minimise the time the system is isolated
To avoid flushing
Why is customer communication important during decommissioning?
It reduces paperwork
It avoids regulations
It allows customers to prepare for loss of heating
It increases efficiency
What should customers be told before heating is isolated?
Radiator sizes
Pipe material
How long the system will be unavailable
Boiler efficiency
Why should customers be advised to collect water beforehand?
To test water pressure
To allow essential use during isolation
To reduce draining time
To protect the boiler
What safety information should be provided before work begins?
Programmer settings
Radiator locations
Which parts of the system will be worked on
Pipe sizes
What must be isolated first before draining a heating system?
Water supply
Gas supply
Electrical supply
Radiators
Why should warning notices be placed at isolation points?
To meet warranty rules
To improve communication
To prevent accidental system operation
To protect pipework
Which component is opened to allow air in during draining?
Expansion vessel
Filling loop
Radiator air release valve
Pump
What should be done after permanently removing heating pipework?
Leave pipes open
Paint pipe ends
Cap pipes at the nearest live connection
Increase pressure
Why must pipework be capped after removal?
To improve flow
To prevent stagnation and contamination
To reduce heat loss
To improve efficiency
What should be done to flue openings after boiler removal?
Leave open
Cover with tape
Make good the building fabric
Insulate only
Central heating water may be discharged to:
Surface water drains
Rainwater gullies
Foul water drains
Soakaways
Why must heating water not be discharged into surface water drains?
It is too hot
It causes blockages
It may cause environmental pollution
It reduces pressure
Which substance must NOT be present in water being discharged?
Inhibitors
Flux residue
Glycol
Sludge
How can accidental operation of a system be prevented?
Closing radiator valves
Removing radiators
Isolating and locking off supplies
Increasing pressure
Why should fuses be removed during decommissioning?
To save energy
To meet regulations
To prevent electrical operation
To improve safety labeling
What should accompany system isolation points?
Programmer
Expansion vessel
Warning notice
Pressure gauge
