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WorksheetsPhase 2 Exam prep 3
Total questions: 20
Worksheet time: 15mins
What chemical is used in the disinfecting process of a hot water system?
Hydrochloric acid
Caustic soda
Sodium hypochlorite
Sodium peroxide
What sort of tap would be suitable for an elderly person with arthritis?
Bib-tap
Long-neck pillar tap
Non-rising spindle tap
Quarter-turn lever tap
What is meant by the term "heat recovery"?
The time taken for primaries to start heating the cylinder
The time taken to heat up a cylinder full of hot water
The time taken for the cylinder thermostat to activate the boiler
The time taken for the boiler to get to temperature
What must happen to any open-ended pipework when a system is being decommissioned?
It should be labelled "not in use"
It should be capped off
It should be reconnected to the appliance
The customer should be advised not to use it
Which British Standard is used alongside BSEN 806 and covers the design, installation, testing and maintenance of servicing supplies for domestic use?
BS 8558
BS 8000
BS 1212
BS 10256
What does WRAS stand for?
Water Ripples And Systems
Water Revival Advanced Scheme
Winter Regulations And Spring
Water Regulations Advisory Scheme
When a gas changes state into a liquid, it is known as...
Sublimation
Expansion
Evaporation
Condensing
What term does the following sentence describe?
The energy used to change the state of a substance which is released during evaporation
Latent heat
Specific heat
Sensible heat
Total heat
How is current correctly defined?
The potential difference within a circuit
The number of electrons flowing per second
The number of neutrons flowing per second
The difference in electron concentration
An electrical immersion heater is required to provide 36,000 kJ of heat energy to heat a cylinder. What is the power of the immersion heater if it raises the temperature of the water to its design temperature within 1 one hour
10 kW
10 W
100 W
100 kW
A pipework system has a static head of 11.6 m. What is the pressure acting upon the lowest part of the system?
11.6 Pascals
11.6 bar
10.6 bar
116,000 Pascals
What is the correct calculation to determine the volume of a cylinder?
3.14×radius2×height
3.14×diameter×height
Diameter÷height×(3.14)2
3.14×diameter2
To determine the current within a circuit, which calculation is used?
Watts/Ohms
Volts/Watts
Watts/Volts
Ohms/Volts
Which one of the following describes the purpose of background heating?
Heat the property to a higher temperature than full central heating
Heat the property quicker than full central heating
Heat only certain rooms in the property, as required
Heat the property to a lower temperature than full central hating
Which one of the following types of valve would you commonly find in a Y-plan system with no bypass?
Three-port diverter valve
Two-port valves
Three-port mid-position valve
Zone valve
A thermostatic radiator valve opens and closes as a result of the temperature of the...
Primary circuit
Boiler
Space it's installed in
Return pipework
Rigid cold water systems should be capable of withstanding an internal pressure of...
2 times the maximum potential operating pressure
Three times the maximum potential operating pressure
The maximum potential operating pressure
1.5 times maximum potential operating pressure
A CWCS requires a wooden base for support. If the cistern base measures
1000 mm x 800 mm, what minimum dimension should the wooden base be cut at?
1300 mm x 1100 mm
1000 mm x 800 mm
1500 mm x 1300 mm
1150 mm x 950 mm
How can you check a gutter and downpipe for soundness and performance?
Wait until it rains, then climb up and look
Pour water into the gutter and inspect the system for ponding and leaks
Ask the customer to let you know if they see any leaks
Join the system together before installation and inspect for leaks
What jointing method, used to join HDPE waste pipework, requires both ends of the pipe to becut, cleaned and heated using a hot plate before being pushed together and allowed to cool?
Fusion welding
Solvent weld
Push-fit
Electrofusion
