Answer ALL questions. Look for any feedback given if you get an answer incorrect. Keep choosing an answer until you get it correct. CORRECT or INCORRECT answers are indicated at the TOP of the page. A score is given at the TOP of the page when the exercise has been completed.
What name is given to electrical heaters that make use of 'off-peak' electricity to accumulate heat, which can then be used later?
immersion heater
underfloor heater
storage heater
electric heater
How much DIVERSITY can be applied to thermostatically-controlled water heaters in a domestic premises?
66%
90%
none
75%
What name is given to a heat-switch mechanism that utilises two dissimilar metals sandwiched together?
bi metal strip
invar rod
3-way heat switch
capilliary type
What name is given to a heat-switch mechanism that utilises a thermally-inert material?
bi metal strip
invar rod
3-way heat switch
capilliary type
What name is given to a heat-switch mechanism that utilises a 'spirit' in its operation?
bi metal strip
invar rod
3-way heat switch
capilliary type
A cooker hot-plate consists of two identical resistances. Ignoring the 'off' position, how many heat settings can be selected?
one
two
three
four
What is the name of the part that heats water in kettles and other water heaters?
element
immersion
cistern
thermostat
Which one of the following is a 'cheap' electricity supply to domestic premises?
economy 5
economy 6
economy 7
economy 8
What part of a central heating system moves the hot water around the pipework and radiators?
pump
boiler
ductwork
thermocouple
What is the name of the electrical device that controls the gas valve in a gas central heating boiler, providing automatic gas shut-off in the event that the pilot light goes out?
thermostat
thermocouple
thermoswitch
programmable timer
What is the maximum current rating for a single-phase 3kw electric heater?
13.04A
16.5A
32A exactly
6.05A
What is the name of the device that provides a measured amount of water into a water heater?
cistern
pressure vessel
heater element
immersion
Which one of the following is a true statement concerning all electric showers over 10kW in a domestic bathroom?
double-pole switch must be used
more than one shower can be installed on the same circuit
an RCD is not required for large showers
a 20A mcb is required for protection
What name is given to the water heater that can provide hot water 'on demand' very quickly?
non-pressure water heater
instantaneous water heater
cistern type water heater
immersion heater
What name is given the the 'earthing conductor' that joins adjacent copper pipework together?
supplementary bonding
circuit protective conductor
equipotential bonding
water bonds
What type of heating systems must have an 'earthed metallic grid' installed?
underfloor heating
immersion heaters
electric air heating
night storage heaters
Which one of the following is a recognised standard of central-heating control system (used by Honeywell)?
Y-plan
Z-plan
A-plan
Q-plan
Which one of the following is a recognised standard of central-heating control system (used by Honeywell)?