WorksheetsQuiz on Hot Water Components and Pipe Lengths
Total questions: 44
Worksheet time: 22mins
Domestic immersion heaters are rated at?
3kW
4kW
11kW
10kW
What type of hot water system is this?
A double feed direct system
A single feed indirect system
A double feed indirect system
A single feed direct system
What type of hot water system is this?
Centralised open vented indirect pumped primaries
Indirect system
Centralised unvented indirect gravity system
Modular system
What type of hot water system is this?
A double feed direct system
A single feed indirect system
A double feed indirect system
A single feed direct system
Building Regulations part G now states that?
Stored hot water must never be able to reach 110°C
Stored hot water must never be able to reach 87°C
Stored hot water must never be able to reach 100°C
Stored hot water must never be able to reach 90°C
To prevent Legionella and any waterborne pathogens being present?
Stored hot water temperature must be 60° and above
Stored hot water temperature must be 55° and above
Stored hot water temperature must be 47° and above
Stored hot water temperature must be 90° and above
What type of hot water component is this?
Blending valve
Pressure release valve
Temperature/pressure release valve
Pressure reducing valve
What type of hot water component is this?
Blending valve
Pressure release valve
Temperature/pressure release valve
Pressure reducing valve
What type of hot water component is this?
Tap Stat
Single check valve
Tank connector
Bronze pump
What type of hot water component is this?
Tap Stat
Single check valve
Tank connector
Bronze pump
BS6700 states the maximum length of pipe before it becomes a dead leg?
12mm to 22mm = 16m
12mm to 22mm = 12m
12mm to 22mm = 14m
12mm to 22mm = 18m
BS6700 states the maximum length of pipe before it becomes a dead leg?
22mm to 28mm = 8m
22mm to 28mm = 10m
22mm to 28mm = 12m
22mm to 28mm = 20m
Guidance on the installation procedures for domestic hot water systems can be found in?
Domestic Water Act 2007
Specification of work
Local Authority Regulations
BS6700
The CWSC supplies both the hot and cold water systems. The minimum size of this cistern is?
Equal to 48 hours’ worth of water
230 litres
100 litres
Twice the size of the domestic hot water cylinder
Which appliances is most likely to offer the customer low pressure at a hot water outlet?
Combination boiler
Direct cylinder
Fortic combination hot water unit
Indirect cylinder
What is this item?
Pressure/temperature relief valve
Double check valve
Blending valve
Stop valve
What is the primary function of the open vent on a domestic hot water system?
Take up a hydraulic shunt
Safety relief pipe
To balance the feed from the CWSC
Allow hot water to be distributed at a controlled pressure.
To prevent the risk of legionella forming in a dead leg it should be?
As short as possible
No longer than 2.5 metres, as stated in BS6700
Disinfected annually under a PPM program
Always heated to above 50°C
What type of shower is this?
Instantaneous electric shower
Thermostatic bar mixer type
Gravity fed shower
Bath mixer shower
Identify one advantage of a stored hot water system in a domestic property?
There is a continual supply of hot water
It is cheaper and easier to install
It is suitable for low water pressure areas
It does not require a secondary source of heat.
Which of the following cylinder types is a indirect cylinder?
A.
B.
C.
D.
Which of the following cylinder types is a indirect single feed cylinder?
A.
B.
C.
D.
If a flow switch on a pumped shower does not work, what would be the result?
The water temperature will remain too high
The pump will not be activated by the electrics
The pump will have restrictive water flow
The water temperature will remain too low
Under the Water Regulations, what can category 2 water be described as?
A. Wholesome water
B. Water representing a severe risk to health
C. Wholesome water with its aesthetic qualities impaired
D. Water representing a slight risk to health
When installing an electric shower where should the service valve be located?
As near as possible to the shower unit
On the outlet side of the shower
At least 300 mm from the heater
After the stop valve.
What is the main reason for installing a secondary circulation supply to a hot water tap?
A) To avoid fitting a pump
B) To prevent dead legs
C) To reduce pressure to the taps
D) To improve pressure.
How should the cold feed pipe in a domestic property be sized?
In accordance with your supervisor
In accordance with BS 6700
In accordance with BS 1212
According to the customer’s requirements.
What backflow prevention is required for an over-the-rim bidet without a shower attachment?
A) Double-check valve
B) Single-check valve
C) AUK1 air gap
D) AUK2 air gap
The minimum distance ‘X’ from the cylinder top connection to the vertical open vent pipe is?
250 mm
450 mm
350 mm
150 mm
The pipework arrangement shown is required in order to prevent?
Reverse circulation
Back-siphonage
One pipe circulation
Secondary circulation
The temperature of the hot water from the hot tap can be increased by turning up the?
Room thermostat
Cylinder thermostat
Cold feed valve
Pump setting
What provides the legal requirements for the installation of hot water distribution pipework?
Construction Regulations
Water Regulations
British Standard 6700
Building Regulations
The WRAS provides specific guidance on?
Water Byelaws
Water Regulations
Building Regulations
British Standards
Which one of the following system components is indicated by the British Standard symbol shown?
Float valve
Circulating pump
Pipe reduction
Hot water cylinder
Isolation for an electric shower from the mains supply is normally provided by installing a?
Pull switch outside the room where the shower is installed
Wall mounted switch within reach of the shower
Pull switch inside the room in which the shower is installed
Wall mounted switch in same room out of reach of the shower
Guidance on the requirements for access to hot water pipework is covered by?
BS 8301
BS 6700
BS 1212
BS 1010
Dead legs should be...
15 metres long
As long as possible
10 metres long
As short as possible
What can be fitted to a HWS to prevent dead legs?
Primary circulation
Extra insulation
Secondary circulation
Trace heating
What is A
Thermostat
Breaker fuse
Limit thermostat
re-set button thermostat
Cold pipes should be installed below hot water pipes, why?
Prevents corrosion
Prevents condensation
Prevents heat gain
Prevents heat loss
What type of air gap is required for a sink?
AUK 1
AUK 2
AUK 3
AG
A thermostatic bar mixer must have...
An unbalanced supply
A restricted supply
A balanced supply
Mains fed supply
Brown water coming from hot water outlets fed by a single feed cylinder indicates what?
A build-up of limescale
Loss of the air bubble
A leaking coil
The CWSC needs cleaning.
Excessive hot water at the outlets could mean...?
A build-up of limescale
A faulty thermostat
Too low a flow rate
Air in the system
