Worksheetshot water
Total questions: 20
Worksheet time: 11mins
The Water Supply (Water Fittings) Regulations 1999
lay down regulations which cover all systems fed from the water undertaker’s supply only
lay down regulations covering all systems fed from private water supplies only
do not cover the installation of water fittings external to the building eg hose union taps
are not legal requirements, but a guide to good practice in undertaking plumbing work.
The recommended minimum diameter for gravity circulation pipework, between the boiler and hot water storage cylinder in a direct hot water system, is
15 mm
22 mm
28 mm
35 mm
The minimum capacity recommended by British Standard EN 806 for a cold water storage cistern, that is feeding all outlets in a dwelling (both hot and cold) is
100 litres
150 litres
230 litres
300 litres
Which of the following situations should be reported to the Water Supplier?
An incorrectly sized cold water storage cistern in an older type Victorian premise.
The proposed installation of a conventional indirect hot water storage system.
Any deficiency in water supply between the main and the water supplier’s stop valve.
The proposed installation of a shower fed from a storage cistern in the loft.
In a single feed indirect hot water storage cylinder, the water in the primary circuit is prevented from mixing with the water in the secondary circuit by means of
a device in the storage cylinder which creates an air lock
a copper coil within the storage cylinder
an annular cylinder within the storage cylinder
a non-return valve on the primary circulation pipework.
A ____ ___ ____valve is usually fitted to the secondary cold feed pipe to a hot water storage cylinder for isolation purposes.
(a)
According to the diagram shown, a notch in a timber joist must extend no further than 0.25 of span
True
false
Which one of the following plastic pipe materials is usually used for domestic hot and cold supply and distribution water pipework?
Acrylonitrile Butadiene Styrene (ABS).
Polybutylene.
Unplasticised polyvinyl chloride (PVC – U).
Polypropylene copolymer (PP).
π×r2 is the formula for calculating
The circumference of a circle
the volume of a hot water cylinder
the area of the base of a hot water cylinder
the weight of water in a hot water cylinder
what is the optimum temperature range for stored hot water
400C - 480c
550C - 600C
600C - 650C
650C - 700C
A hot water cylinder has a head pressure of 15metres at its base. What is the pressure in bar. Hint - 1 bar = 9.81metres head
1.45 bar
1.46 bar
1.47 bar
1.49 bar
which two materials are unsuitable for hot water distribution pipework
galvanised steel
R250 copper
low carbon steel
MDPE
What valve should be installed on the outlet of a cold water cistern
What is this tool used for?
Installing an Immersion heater
Cutting holes in plastic cisterns
Fitting taps
Fitting float valves
The purpose of this valve is to?
Control the water flow to the cylinder
Prevent hot and cold water mixing in the pipe work
Mix hot and cold water to prevent scalding
Prevent the water in the cylinder from reaching above 65 dc
What is the max temperature of water on a bath in a new build home?
43
60
48
38
What must be fitted to all new immersion heater thermostats?
A thermal cut out
A warning light
A thermostat set to 50
A 13amp plug
An electric shower is a form of?
Direct single point hot water
Indirect single point hot water
Indirect multi point hot water
Direct multi point hot water
This picture shows?
A direct cylinder
An Indirect cylinder
A combination Cylinder
A prismatic cylinder
The regulations that cover Hot water systems are?
The Water Regulations 1999 and Building regulation part H
The Water Regulations 1999 and Building regulation part G
The Water Regulations 1999 and Building regulation part P
The Water Regulations 1999 and Building regulation part B
