GMJ 6035 central heating 5

When it comes to humidity, which of the following would be ideal in a home environment?

• 10 to 20 per cent

• 20 to 40 per cent

• 40 to 60 per cent

• 50 to 70 per cent

When designing a domestic central heating system, which of the following is the most important?

• Clothing worn by occupants

• Age and health of occupants

• Finances of occupants

• Occupation of occupants

Which of the following is incorrect?

• C-Plan semi-gravity system

• One-pipe semi-gravity system

• Two-pipe semi-gravity system

• One-pipe semi-gravity system with heat sink for solid fuel boilers

Fully pumped heating systems offer wider installation options for which of the following:

• The boiler

• The pipework

• The pump

• The storage cylinder

When using a Y-Plan pumped system, which of the following is incorrect?

• Compliant with Building Regulations Document L

• It can be zoned

• Can be used with system boilers

• Can be used with sealed (pressurised) systems

In a fully pumped system, the minimum height the open vent should be from the water level in the cistern to the top of the open vent pipe is:

• 300mm

• 350mm

• 400mm

• 450mm

Which of the following would not be available if you used a sealed system with system boiler?

• Full thermostatic control

• Anti-cycling boiler interlock

• Instantaneous hot water supply

• Compliancy with Building Regulations Document L

Which of the following is not classed as a solid fuel?

• Coke

• Anthracite

• Oil

• Coal

Which of the following statements about condensing boilers is true?

• They are noisy

• They do not work if the condensing lines freeze during the winter

• System corrosion increases

• They are very inefficient

– In percentage terms, how efficient are modern condensing boilers?

• 85%

• 90%

• 87%

• 93%