Heating System Quiz

Which British Standard covers the method for the calculation of design heating loads?

• BS EN 12828:2003

• BS EN 12381:2003

• BS EN 14336:2004

• BS EN 1264-1:1998

What is the measurement of the U-value? Remember this measurement for your exam!

• w/m2K

• kj/moC

• w/kg/K

• J/m3/K

What is the correct formula to determine the heat loss from a space through air changes and ventilation? Remember this formula for your exam!

• m2 x Δt x 1.33

• m2 x Δt x U-value

• m3 x QTY x Δt x 0.33

• m3 x U-value x QTY x 3

What are the likely effects of oversizing a heating system?

• Reduced energy usage, as systems produce enough heat quickly before shutting off for longer periods

• Reduced life expectancy of heat emitters, which often overheat due to higher temperatures

• Greater risk of burns/scalds, due to excess temperatures within the system and increased boiler combustion efficiency

• Reduced energy efficiency, as boilers ‘hunt’, and greater initial outlay costs

What is the most suitable external design temperature for a house with normal sheltered exposure in England and Wales?

• -1oC

• -3oC

• -4oC

• -5oC

What is the correct formula to determine the heat loss through a surface such as a wall or window? Remember this formula for your exam!

• m2 x Δt x 1.33

• m2 x Δt x U-value

• m3 x QTY x Δt x 0.33

• m3 x U-value x QTY x 3

A radiator has a temperature of 70oC at the inlet and 50oC at the outlet. What is the maximum water temperature of the radiator?

• 20oC

• 40oC

• 50oC

• 60oC

You are trying to determine the correct size of an expansion vessel for a typical domestic central heating system. The system is installed in 22mm and 15mm copper. Which of the following methods could be used to give an approximate system volume?

• 2 litres per kW of the boiler

• 4 litres per kW of the boiler

• 6 litres per kW of the boiler

• 10 litres per kW of the boiler

What is the term given to the radiator within a central heating system which is the furthest from the heat source?

• The content circuit

• The shunt circuit

• The hydraulic circuit

• The index circuit

What is the formula used to determine the flow rate for a circuit? Remember this formula for your exam!

• kg/s = kW / 4.19 x Δt

• W = kg x SHC x Δt

• kW = 4.19 / kg x 1.33

• Litres = kW x SHC / Δt