12085294
Descripción
Test por james crowley, actualizado hace más de 1 año
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Creado por james crowley
hace casi 7 años
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Pregunta 1
Pregunta
Which one of the following pieces of information will be provided by the
installation plan?
Respuesta
-
a. The dwelling position on the estate
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b. The expected completion date
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c. The order in which work should take place
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d. The position of the hot water pipes and valves in a dwelling.
Pregunta 2
Pregunta
The water supply (water fittings) regulations 1999 lay down:
Respuesta
-
a. The regulations covering all internal and external hot and cold water systems for dwellings
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b. The guidance for good practice when installing hot and cold pipework in a dwelling
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c. The regulations that cover hot water systems only
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d. The guidance for internal hot and cold water systems only within a dwelling.
Pregunta 3
Pregunta
Which one of the following hot water components should be fixed using flexible
connections?
Respuesta
-
a. Indirect hot water cylinder
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b. Shower mixer valve
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c. Booster pump for a shower
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d. External bib tap.
Pregunta 4
Pregunta
A rigid pipework hot water system has a working pressure of 4bar. At what
pressure should the pipework be tested for soundness?
Respuesta
-
a. 1bar for 60 minutes
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b. 1½ times the working pressure for 15 minutes
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c. 6bar for one hour
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d. 4bar for 30mins then 6bar for 15 minutes.
Pregunta 5
Pregunta
To prevent electrolytic corrosion taking place in a system, where can the
magnesium rod be placed?
Respuesta
-
a. The cold water storage cistern
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b. The hot water cylinder
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c. The circulator
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d. The open vent.
Pregunta 6
Pregunta
Guidance on the installation procedures for domestic hot water systems can be
found in:
Respuesta
-
a. Domestic Water Act 2007
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b. Specification of work
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c. BS6700
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d. Local Authority Regulations.
Pregunta 7
Pregunta
In a customer’s property, the CWSC supplies both the hot and cold water
systems. The minimum size of this cistern is:
Respuesta
-
a. Equal to 48 hours’ worth of water
-
b. 230 litres
-
c. 100 litres
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d. Twice the size of the domestic hot water cylinder.
Pregunta 8
Pregunta
Which of the following appliances is most likely to offer the customer low pressure
at a hot water outlet?
Respuesta
-
a. Combination boiler
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b. Direct cylinder
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c. Combination unit
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d. Indirect cylinder.
Pregunta 9
Respuesta
-
a. Pressure/temperature relief valve
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b. Double check valve
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c. Stop valve
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d. Blending valve.
Pregunta 10
Pregunta
If hard water is allowed to be heated above 65oC, what could be the consequence
in the system?
Respuesta
-
a. Legionella could grow
-
b. The blending valve would fail to work
-
c. The pressure relief valve would open
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d. The efficiency could be affected by limescale.
Pregunta 11
Pregunta
What is used at a basin outlet to prevent contamination of the water system?
Respuesta
-
a. AUK2 air gap
-
b. AUK3 air gap
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c. AG air gap
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d. AUK4 air gap.
Pregunta 12
Pregunta
A customer has intermittent flow of hot water from their bath tap – what is the
most likely cause of the problem?
Respuesta
-
a. Too little head pressure
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b. Too much head pressure
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c. Air lock
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d. Faulty float operated valve.
Pregunta 13
Pregunta
What is the primary function of the open vent on a domestic hot water system?
Respuesta
-
a. Safety relief pipe
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b. Take up a hydraulic shunt
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c. Allow hot water to be distributed at a controlled pressure
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d. To balance the feed from the CWSC.
Pregunta 14
Pregunta
To overcome a dead leg for a hot water draw-off point, what course of action
could be taken?
Respuesta
-
a. Install secondary circulation
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b. Install a more powerful circulator
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c. Increase the size of the hot water cylinder
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d. Increase the temperature on the cylinder thermostat.
Pregunta 15
Pregunta
To prevent the risk of legionella forming in a dead leg it should be:
Respuesta
-
a. No longer than 2.5 metres, as stated in BS6700
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b. Disinfected annually under a PPM program
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c. As short as possible
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d. Always heated to above 50oc
Pregunta 16
Respuesta
-
a. Instantaneous electric shower
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b. Thermostatic bar mixer type
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c. Gravity fed shower
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d. Bath mixer shower.
Pregunta 17
Pregunta
Identify one advantage of a stored hot water system in a domestic property.
Respuesta
-
a. There is a continual supply of hot water
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b. It is cheaper and easier to install
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c. It does not require a secondary source of heat
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d. It is suitable for low water pressure areas.
Pregunta 18
Pregunta
18. Which one of the following heat sources is regarded as a renewable source of
energy?
Respuesta
-
a. Coal in a solid fuel boiler
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b. Gas in a condensing boiler
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c. Solar panels on the roof of a property
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d. Electricity supplying an immersion heater.
Pregunta 19
Pregunta
19. Where would state the maximum flow rate and temperature for a particular
pumped shower that has been installed?
Respuesta
-
a. BS6700
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b. The Water Regulations
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c. The manufacturer’s instructions
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d. Building Regulations part G.
Pregunta 20
Pregunta
20. Under Building Regulations part G, what is a new or replacement immersion
heater required to have?
Respuesta
-
a. Temperature relief valve
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b. Non-resetting overheat thermostat
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c. Restricted thermostat to a maximum temperature of 60oC
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d. Protective coating to avoid electrolytic corrosion.
Pregunta 21
Pregunta
Which of the following cylinder types is a direct cylinder?
Respuesta
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A
-
B
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C
Pregunta 22
Pregunta
22. The connection for a secondary circulation system return should be made at what
point in the hot water cylinder?
Respuesta
-
a. Bottom third of the cylinder
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b. Top third of the cylinder
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c. Middle point of the cylinder
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d. Just prior to the open vent connection.
Pregunta 23
Pregunta
23. If a system is prone to limescale build ups, this shows:
Respuesta
-
a. The property is in a soft water area and the temperatures are set too high
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b. The property is in a hard water area and the temperatures are set too high
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c. The property has a gravity hot water system that requires upgrading
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d. The water pressure in the system is too high and requires reducing.
Pregunta 24
Pregunta
24. If a flow switch on a pumped shower does not work, what would be the result?
Respuesta
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a. The water temperature will remain too high
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b. The water temperature will remain too low
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c. The pump will not be activated by the electrics
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d. The pump will have restrictive water flow.
Pregunta 25
Pregunta
25. Under the Water Regulations, what can category 2 water be described as?
Respuesta
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a. Wholesome water
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b. Water representing a slight risk to health
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c. Wholesome water with its aesthetic qualities impaired
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d. Water representing a severe risk to health.
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