WorksheetsHot Water Level 2 C&G
Total questions: 39
Worksheet time: 13mins
Which document contains guidelines for designing and installing a hot water system?
Building Regulations
British Standards
WRAS standards
City and Guilds regulations
What is the new British Standard that covers the supply of water at domestic properties?
BS1566
BS806
BS6700
BS8558
What factors should be considered in the selection and design of a hot water system?
Type of fuel
Installation costs
Available services
All the above
What are the two main categories of hot water systems installed in properties?
Direct and indirect
Gas-fired and electric
Single feed and double feed
How is the primary and secondary water separated in an indirect cylinder
By air lock system
By the coil
By thermostat control
By pump circulation
What is the purpose of a thermostatic mixing valve in a hot water system?
To store water at high temperature
To distribute water at high temperature
To blend water to a safe temperature
To deliver water at low temperature
What is the maximum temperature of the water supplied to prevent scalding?
43–46⁰C
35–43⁰C
60–65⁰C
50–55⁰C
What is the average hot water usage per person per day in modern homes?
35–40 litres
50–55 litres
40–45 litres
45–50 litres
What type of hot water cylinder is this
Indirect double feed cylinder
Indirect single feed cylinder
Combination type cylinder
Direct single feed cylinder
What type of hot water storage cylinder is this
Indirect single feed
Primatic
Combination "Fortic"
Double feed unvented
What type of hot water stroage vessel is this
Pressurised unvented
Open vented
Combination type
Hot jacket type
What is this hot water component called
Immersion heater
Immersion spanner
Expansion valve
Immersion beater
This hot water component is called
Hampshire Flange
Berkshire Flange
Essex Flange
Surrey Flange
The safety device incorporated inside an immersion heater is called
A thermostat
A thermal cut out
A thermometer
A resistor-stat
To avoid Parasitic circulation in a HW cylinder vent pipe the length of horizontal pipework should be a minimum of how many mm
405mm
554mm
450mm
540mm
What is this device called
A TMV Thermostatic mixing valve
A TSV Thermostatic shower valve
A TRV Thermostatic radiator valve
A TCV thermostatic cylinder valve
Thermostatic mixing valves should blend the hot and cold water to a bath or shower valve to what maximum temperature C
60
43
38
55
A pump is required on a secondary circulation system- what should the pump be made from
Cast Iron
Ferrous metal
Any heating pump will do as long as its metal
Bronze
What is the name of this type of hotwater storage cylinder
Primatic single feed
Indirect double feed vented
Thermal hot store or hot jacket
Unvented pressurised
Where on a domestic hot water cylinder should the cold feed be connected?
Bottom
Top
Middle
A third of the way up
What does WRAS stand for?
Water Revival Advanced Scheme
Winter Regulations and Spring
Water Regulations Advisory Scheme
Water Ripples and Systems
Which is the best description of category 1 water?
Water stored at 60°C
Wholesome water
Water that offers a slight health risk
Water that has a mild chemical added
What device is used to protect category 1 water from being contaminated by category 2 water?
RPZ valve
AUK1 air gap
Single check valve
AG air gap
Which Building Regulation states that one of these valves must be fitted before the outlet on any new bath fitted?
Part H
Part L
Part G
Part P
If a hot water appliance had a fault, where would you look for guidance?
BSEN806
The Water Supply (Water Fittings) Regulations
The manufacturer's instructions
Building Regulations Part L
Which one of the following systems can this appliance be connected to?
Low pressure system fed from a cold-water storage cistern
Thermal store heater
Single point water heater
Unvented hot water system
What backflow prevention device is being used to protect the wholesome water against contamination in this shower valve?
Double check valve
AUK2 air gap
Single check valve
RPZ valve
What is the purpose of a hot water storage cylinder in the system?
To cool the water
To store the hot water
To filter the water
To circulate the water
This picture shows?
A direct cylinder
An Indirect cylinder
A combination Cylinder
A prismatic cylinder
The picture shows a?
Indirect cylinder
Direct cylinder
Unvented cylinder
Single feed cylinder
How is the temperature of the hot water in the cylinder controlled?
Using a pressure valve
By adjusting the water flow
With a thermostat
Through manual inspection
Which component in the diagram is responsible for heating the stored water?
The cold feed connection
The primary flow connection
The internal coil
The primary return connection
What is the normal diameter of the primary feed and return pipework in an indirect hot water supply system?
22mm
28mm
25mm
30mm
A hot water storage cylinder heated by an immersion heater only is considered to be what type of hot water storage system?
Direct
Indirect
Electrolytic
Instantaneous
When water is heated in a hot water storage cylinder, stratification will occur. Which of the following best describes stratification?
The hottest water is in the middle of the cylinder; the coldest water is at the top and bottom of the cylinder
The coldest water is at the top of the cylinder and the hottest water is at the bottom of the cylinder
The coldest water is in the middle of the cylinder; the hottest water is at the top and bottom of the cylinder
The hottest water is at the top of the cylinder and the coldest water is at the bottom of the cylinder
What type of cylinder is shown below?
Single feed indirect cylinder
Direct cylinder
Combination cylinder
Unvented cylinder
What type of boiler provides instantaneous hot water to multiple outlets, as well as central heating, and is known as a hot water priority system?
Condensing boiler
Electric boiler
Combination boiler
Combination cylinder
Which Building Regulation covers Hot Water
Part L
Part G
Part P
Part A
What percentage will water expand by when heated from 4 degrees Celsius to 85 degrees Celsius?
4%
5%
6%
3%
