WorksheetsHot Water - PPT 1 - Hot Water Systems and Their Layouts
Total questions: 49
Worksheet time: 25mins
Which regulation should be followed when designing and installing a hot water system?
The Water Supply (Water Fittings) Regulations 1999
The Electrical Safety Regulations 2005
The Gas Safety Regulations 2010
The Fire Safety Regulations 2008
Which British Standards are relevant for plumbing installation work?
BS806, BS8558
BS101, BS202
BS303, BS404
BS505, BS606
What Building Regulations covers hot water?
Part L
Part A
Part B
Part C
Which of the following is a factor to consider when selecting a hot water system?
Color of the building
Type of building (e.g., domestic, commercial)
Brand of appliances
Weather conditions
What type of fuel can be used for a hot water system?
Wood
Gas, oil, electric, or solar
Coal
Nuclear
What are the two broad categories of hot water systems mentioned in the document?
Storage and non-storage
Open-vented and closed-vented
Sealed and unsealed
Domestic and commercial
What type of boilers are popular in new domestic buildings?
Combination boilers
Storage boilers
Instantaneous boilers
Open-vented boilers
What are the two main categories of hot water supply systems?
Centralized and Distributed
Centralized and Localized
Localized and Global
Distributed and Global
What are the three main types of storage systems mentioned?
Direct feed, Indirect single feed, Indirect double feed
Single feed, Double feed, Triple feed
Direct feed, Single return, Double return
Primary feed, Secondary feed, Tertiary feed
In larger installations, what additional component may be used?
Secondary return
Primary feed
Double feed
Single return
What is the primary function of a hot water storage cylinder in a cylinder/tank system?
To supply water to the cylinder
To store the hot water
To heat the water to 60ºC
To connect components and supply hot water
Which component in a cylinder/tank system supplies water to the cylinder?
Heat source
Pipework
Feed cistern (tank)
Hot water storage cylinder
What is the approximate temperature to which the heat source heats the water in a cylinder/tank system?
50ºC
60ºC
70ºC
80ºC
What is the purpose of the 22mm vent pipe in a direct plumbing system?
To discharge into the CWSC and seal with a grommet
To connect the heat source to the cylinder
To reduce water pressure
To increase water flow
What type of valve is used in a direct plumbing system for full-way control?
22mm or 28mm full-way gate valve
15mm ball valve
10mm check valve
30mm pressure valve
What is the role of the heat source circulator in a direct plumbing system?
To circulate heat or act as a back boiler behind a solid fuel fire
To discharge water into the CWSC
To reduce water pressure
To increase water flow
In a direct system, how is water heated?
By solar panels
Directly from a boiler or immersion heater
Using a heat pump
Through a central heating system
What is a potential issue with water in a direct system?
It may freeze easily
It can become coloured or dirty
It evaporates quickly
It is always too hot
What is a disadvantage of a direct system in hard water areas?
Increased energy consumption
Greater risk of scale formation
Faster water flow
Lower water pressure
What principle does the direct system work on?
Conduction
Radiation
Convection
Evaporation
Where is the direct system still found today?
New buildings
Older properties or flats with immersion heaters
Commercial buildings
Industrial plants
What must control all immersion heaters in a direct system?
Manual switch
Integral thermostat
External timer
Pressure gauge
How does water behave as it is heated in the direct system?
It becomes more dense and sinks
It becomes less dense and rises
It evaporates immediately
It remains at the bottom
In modern direct systems, what is used to heat the water?
Gas burners
Solar panels
3kW immersion heaters
Electric coils
What is a requirement for all immersion heaters installed today?
A self-resetting button
A reset button or cut-out device
A manual switch
A digital display
What is the power rating of domestic immersion heaters?
5kW
2kW
3kW
4kW
What type of cable must be used when installing immersion heaters?
2mm plastic cable
1.5mm heat-resistant butyl cable
1mm copper cable
3mm rubber cable
What type of cable is required for the mains connection of an immersion heater?
Two-core and earth 2.5mm cable
Single-core 1.5mm cable
Three-core 4mm cable
Two-core 3mm cable
What is the purpose of the special heat exchanger in an indirect single feed system?
To increase water pressure
To separate primary and secondary water using air bubbles
To heat the water directly
To reduce water temperature
What size is the vent pipe discharging into the CWSC in an indirect single feed system?
15mm
18mm
22mm
28mm
What type of circulation occurs from the boiler to the cylinder in an indirect single feed system?
Forced circulation
Gravity circulation
Pumped circulation
Manual circulation
What separates primary and secondary water in an indirect single feed system?
A filter system
An air lock system
A chemical barrier
A physical wall
What is the capacity of the storage cistern fitted with BS 1212 part 2 FOV?
100 litres
150 litres
200 litres
250 litres
What is the diameter of the primary flow and return pipes from the boiler to the coil in the cylinder?
15mm
22mm
28mm
32mm
What is the most common hot water delivery system used in the UK?
Direct single feed
Indirect double feed
Solar heating system
Electric immersion heater
What is the purpose of the heat exchanger in an indirect cylinder?
To mix boiler water with storage vessel water
To heat the water directly in the storage vessel
To circulate hot water from the boiler without mixing
To cool down the water in the storage vessel
What type of hot water stroage vessel is this
Pressurised unvented
Open vented
Combination type
Hot jacket type
What type of hot water storage cylinder is this
Indirect single feed
Primatic
Combination "Fortic"
Double feed unvented
What type of water heater is classed as a localised water heater
What is this hot water component called
Immersion heater
Immersion spanner
Expansion valve
Immersion beater
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
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 type of shower is this?
Instantaneous electric shower
Thermostatic bar mixer type
Gravity fed shower
Bath mixer shower
Which method of heat transfer is illustrated on the diagram
radiation
conduction
convection
thermal relaying
