Quiz
Unit 206: Domestic hot water systems practice test
Create a free account to finish this quiz
Save your progress and see your final score.
Already have an account? Sign in
Questions in this quiz (25)
1Which one of the following pieces of information will be provided by the
installation plan?- Aa. The dwelling position on the estate
- Bb. The expected completion date
- Cc. The order in which work should take place
- Dd. The position of the hot water pipes and valves in a dwelling.
2The water supply (water fittings) regulations 1999 lay down:
- Aa. The regulations covering all internal and external hot and cold water
systems for dwellings - Bb. The guidance for good practice when installing hot and cold pipework in a
dwelling - Cc. The regulations that cover hot water systems only
- Dd. The guidance for internal hot and cold water systems only within a dwelling.
- Aa. The regulations covering all internal and external hot and cold water
3Which one of the following hot water components should be fixed using flexible
connections?- Aa. Indirect hot water cylinder
- Bb. Shower mixer valve
- Cc. Booster pump for a shower
- Dd. External bib tap.
4A rigid pipework hot water system has a working pressure of 4bar. At what
pressure should the pipework be tested for soundness?- Aa. 1bar for 60 minutes
- Bb. 1½ times the working pressure for 15 minutes
- Cc. 6bar for one hour
- Dd. 4bar for 30mins then 6bar for 15 minutes.
5To prevent electrolytic corrosion taking place in a system, where can the
magnesium rod be placed?- Aa. The cold water storage cistern
- Bb. The hot water cylinder
- Cc. The circulator
- Dd. The open vent.
6Guidance on the installation procedures for domestic hot water systems can be
found in:- Aa. Domestic Water Act 2007
- Bb. Specification of work
- Cc. BS6700
- Dd. Local Authority Regulations.
7In a customer’s property, the CWSC supplies both the hot and cold water
systems. The minimum size of this cistern is:- Aa. Equal to 48 hours’ worth of water
- Bb. 230 litres
- Cc. 100 litres
- Dd. Twice the size of the domestic hot water cylinder.
8Which of the following appliances is most likely to offer the customer low pressure
at a hot water outlet?- Aa. Combination boiler
- Bb. Direct cylinder
- Cc. Combination unit
- Dd. Indirect cylinder.
9What is this item?
- Aa. Pressure/temperature relief valve
- Bb. Double check valve
- Cc. Stop valve
- Dd. Blending valve.
10If hard water is allowed to be heated above 65oC, what could be the consequence
in the system?- Aa. Legionella could grow
- Bb. The blending valve would fail to work
- Cc. The pressure relief valve would open
- Dd. The efficiency could be affected by limescale.
11What is used at a basin outlet to prevent contamination of the water system?
- Aa. AUK2 air gap
- Bb. AUK3 air gap
- Cc. AG air gap
- Dd. AUK4 air gap.
12A customer has intermittent flow of hot water from their bath tap – what is the
most likely cause of the problem?- Aa. Too little head pressure
- Bb. Too much head pressure
- Cc. Air lock
- Dd. Faulty float operated valve.
13What is the primary function of the open vent on a domestic hot water system?
- Aa. Safety relief pipe
- Bb. Take up a hydraulic shunt
- Cc. Allow hot water to be distributed at a controlled pressure
- Dd. To balance the feed from the CWSC.
14To overcome a dead leg for a hot water draw-off point, what course of action
could be taken?- Aa. Install secondary circulation
- Bb. Install a more powerful circulator
- Cc. Increase the size of the hot water cylinder
- Dd. Increase the temperature on the cylinder thermostat.
15To prevent the risk of legionella forming in a dead leg it should be:
- Aa. No longer than 2.5 metres, as stated in BS6700
- Bb. Disinfected annually under a PPM program
- Cc. As short as possible
- Dd. Always heated to above 50oc
16What type of shower is this?
- Aa. Instantaneous electric shower
- Bb. Thermostatic bar mixer type
- Cc. Gravity fed shower
- Dd. Bath mixer shower.
17Identify one advantage of a stored hot water system in a domestic property.
- Aa. There is a continual supply of hot water
- Bb. It is cheaper and easier to install
- Cc. It does not require a secondary source of heat
- Dd. It is suitable for low water pressure areas.
1818. Which one of the following heat sources is regarded as a renewable source of
energy?- Aa. Coal in a solid fuel boiler
- Bb. Gas in a condensing boiler
- Cc. Solar panels on the roof of a property
- Dd. Electricity supplying an immersion heater.
1919. Where would state the maximum flow rate and temperature for a particular
pumped shower that has been installed?- Aa. BS6700
- Bb. The Water Regulations
- Cc. The manufacturer’s instructions
- Dd. Building Regulations part G.
2020. Under Building Regulations part G, what is a new or replacement immersion
heater required to have?- Aa. Temperature relief valve
- Bb. Non-resetting overheat thermostat
- Cc. Restricted thermostat to a maximum temperature of 60oC
- Dd. Protective coating to avoid electrolytic corrosion.
21Which of the following cylinder types is a direct cylinder?
- AA
- BB
- CC
2222. The connection for a secondary circulation system return should be made at what
point in the hot water cylinder?- Aa. Bottom third of the cylinder
- Bb. Top third of the cylinder
- Cc. Middle point of the cylinder
- Dd. Just prior to the open vent connection.
2323. If a system is prone to limescale build ups, this shows:
- Aa. The property is in a soft water area and the temperatures are set too high
- Bb. The property is in a hard water area and the temperatures are set too
high - Cc. The property has a gravity hot water system that requires upgrading
- Dd. The water pressure in the system is too high and requires reducing.
2424. If a flow switch on a pumped shower does not work, what would be the result?
- Aa. The water temperature will remain too high
- Bb. The water temperature will remain too low
- Cc. The pump will not be activated by the electrics
- Dd. The pump will have restrictive water flow.
2525. Under the Water Regulations, what can category 2 water be described as?
- Aa. Wholesome water
- Bb. Water representing a slight risk to health
- Cc. Wholesome water with its aesthetic qualities impaired
- Dd. Water representing a severe risk to health.
Information
- Description
- Unit 206: Domestic hot water systems
- Author
- james crowley
- Language
- English
- Views
- 11,143
- Tags
- Rating
- 4.5 out of 5 · 2 ratings Rate this quiz