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WorksheetsPhase 2 Re-cap & Revision
Total questions: 60
Worksheet time: 30mins
An RPZ valve should be installed with
an isolating valve upstream of the RPZ valve
an isolating valve downstream of the RPZ valve
an isolating valve both upstream and downstream of the RPZ valve
no isolating valves
In which one of the following fluid categories does the domestic water from a washbasin fall
Category 1
Category 2
Category 3
Category 4
What is the component labelled A in the diagram
Expansion cistern
Break cistern
Duplicate pumps
Circulating pumps
Under Regulation 5 of the Water Regulations, the water undertaker must be informed when which one of the following operations is carried out?
Installation of a pump drawing more than 12 litres per minute
Installation of a bidet without an ascending spray or flexible hose
Installation of a bath with a capacity of fewer than 230 litres
Installation of an RPZ valve to protect against a category 2 fluid
The type of non-mechanical backflow prevention used on a domestic washbasin is known as
AUK 1
AUK 2
AUK 3
AUK 4
Which of the following items of legislation covers the requirements for the hydraulic testing of cold water pipe lines
Water Byelaws (England 2004)
British Standards 5449
Water Supply (Water Fittings) Regulations 1999
Building Regulations Part G (P in Northern Ireland)
Which one of the following mechanical backflow prevention devices would be used when installing a replacement hose union bib tap
BA
HUK1
HA
HC
Which one of the following types of air gap provides suitable backflow protection for the taps in a washbasin installed in a hospital
AB air gap
AUK 1 air gap
AUK 2 air gap
AUK 3 air gap
Service valves should be installed in which one of the following locations
On the cold feed to the primary circuit
On the cold feed pipe from the cold water storage cistern
Immediately after the internal stop valve
Immediately after the external stop valve
Metallic cold water systems should be capable of withstanding an internal pressure of
the maximum potential operating pressure
1.5 times the maximum potential operating pressure
2 times the maximum potential operating pressure
3 times the maximum potential operating pressure
Which one of the following is a style of plastic guttering
Elsan
Mansard
Ogee
Half channel
Which one of the factors listed needs to be considered before the installation of a rainfall system
The height and shape of the building
The type of roof covering that the property has
The roof area and direction of fall
What type of drainage system the building is connected to
How can you check a gutter and downpipe for soundness and performance
Wait until it rains, then climb up to look
Pour water into the gutter and inspect the system for ponding and leaks
Ask the customer to let you know if they see any leaks
Join the system together before installation and inspect for leaks
What is another term for the offset from a gutter to downpipe
Cranked turn
Direco-change
Goose neck
Swan neck
What is a common downpipe diameter
68mm
50mm
72mm
32mm
In a rainwater system, what is the normal ratio of fall for the gutter
1:400
1:60
1:6000
1:600
On domestic properties, what is the maximum distance at which the facia brackets should be apart
1.25m
1500mm
1000mm
1.8m
Which one of the following is an advantage of plastic guttering systems
Flexible and low maintenance
It only requires painting every two years
Running outlet connections can be made on every elevation
Expansion is taken up in caulked joints
Which of the following is a downpipe fitting
Slipper
Boot
Shoe
Belt
When fitting plastic guttering, where is the allowance for expansion and contraction made
At the running outlet connections
Every 10m where there is an expansion and contraction connection
At the corner connections only
In each of the fittings
The diagram below shows which type of drainage system
A combined system
A partially combined system
A separate system
A partially separate system
What is the maximum distance allowed from the highest waste connection to the invert of the drain on a stub stack system before ventilation is required
1.6m
1.8m
2m
2.5m
A waste pipe discharging into a ground level gully should do which of the following
Discharge over the grate
Discharge through the grate but above the water level of the trap seal
Discharge adjacent to the grate
Discharge through the grate and below the water level of the trap seal
If a 4m length of soil pipe had a fall of 18mm per meter, what would the vertical drop be at the end of the pipe run
180mm
110mm
418mm
72mm
The image shows a fixing which would be used in the installation of which of the following appliances
A wall hung WC
A washbasin fixed to a wall without a pedestal
A combined towel hook and cup holder
A shower unit with hose loop
The Water Regulations state that which of the following are the maximum flushes for a WC
4 litres short flush and 6 litres long flush
10 litres long flush and 6 litres short flush
9 litres long flush and 6 litres short flush
3 litres short flush and 5 litres long flush
An ascending spray bidet can be described by which of the following sentences
A spray entering the appliance, from a tap, from above the rim of the bidet
A spray entering the bidet from the side of the appliance
A spray entering the area of the bidet from a high level
A spray entering the bidet from the base of the appliance
The diagram shows a cross-section of a type of WC pan. Select the correct description from the answers below
Wash down with double trap
Siphonic with an overflow
Wash down with single trap
Siphonic with a double trap
Which of the following should be the minimum diameter of a kitchen sink waste discharge pipe
32mm
40mm
50mm
65mm
A self-sealing valve is designed to operate in which way when under back pressure
Remain tightly closed
Always remain open
Occasionally open
Remain in the mid-position
Where on a domestic hot water cylinder should the cold feed be connected
Bottom
Top
Middle
A third of the way up
What sort of tap would be best suited for an elderly person with arthritis
Bib tap
Long neck pillar tap
Non-rising tap
Quarter turn tap
What is meant by the term ‘heat recovery’
The time taken for the boiler to get to temperature
The time taken to heat up a full cylinder of hot water
The time take for the primaries to start heating the cylinder
The time taken for the cylinder thermostat to activate the boiler
What does this diagram show
Electric shower
Double impeller shower
Gravity shower
Single impeller shower
What does WRAS stand for
Water Revival Advanced Scheme
Winter Regulations and Spring
Water Regulations Advisory Scheme
Water Ripples and Systems
If there is a faulty fullway gate valve in the system, what should you do
Replace the back nut to release the fault
Replace the body of the valve and leave the head gear
Lubricate the body to release the fault
Replace the whole valve
Which is the best description of category 1 water
Water stored at 600C
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
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 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
Which one of the following Building Regulations discusses the control of heating systems within new-build dwellings
Part L1a
Part L1b
Part L2a
Part L2b
Which one of the following describes the purpose of background heating
Heat the property quicker than full central heating
Heat only certain rooms in the property, as required
Heat the property to a lower temperature than full central heating
Heat the property to a higher temperature than full central heating
Identify the type of heating system shown in the image below
Open vented S-plan system
Sealed S-plan system
Open vented Y-plan system
Sealed Y-plan system
An automatic bypass valve is activated by which of the following
Boiler shutting off
Programmer being switched on
Pressure created within the system
Pressure of the incoming water service
The main reason a radiator should be installed 150mm above floor level is to
Reduce the risk of fire
Allow the heat to circulate
Protect the flooring from possible leaks
Allow easier access for maintenance work
A thermostatic radiator valve opens and closes as a result of the temperature of the…
Primary circuit
Boiler
Space it’s installed in
Return pipework
A pump should be positioned so that the heating system is operating under…
No pressure
In a neutral position, but under positive pressure
Negative pressure
Both positive and negative pressures
An automatic air vent should be positioned at the…
Highest part of the system
Lowest point of the system
Point where the vent enters the system
Point where the cold feed enters the system
Which one of the following central heating systems uses a manifold
One-pipe system
Two-pipe system
Microbore system
Gravity pipe system
Installing an air separator allows which one of the following to take place
Close coupling of the cold feed and vent connections
Close coupling of the flow and return connections
Close coupling of the pump and the vent connections
Close coupling of the motorised valve connections
What temperature is 373K in the Celsius scale
173⁰C
100⁰C
-173⁰C
-200⁰C
What does the symbol ∆t (delta-t) represent
Difference in temperature
Direct temperature
Difference in pressure
Direct pressure
When a gas changes state into a liquid, it is known as…
Evaporation
Condensing
Sublimination
Expansion
When a liquid changes state into a gas, it is known as…
Evaporation
Condensing
Sublimination
Expansion
What is atmospheric pressure at sea level
0 bar
1.01 bar
10.1 bar
100 bar
At what temperature would water boil if subjected to 3 bar of pressure
100⁰C
110⁰C
123⁰C
143⁰C
What term does the following sentence describe?
The energy used to change the state of a substance which is released during evaporation.
· Sensible heat is the heat that you feel such as the sun shining on a sunny day.
· Latent heat is the heat that changes a state of an element (liquids into gas). Latent means hidden, something that you cannot feel.
· Specific heat is the heat required to raise the temperature of one gram of substance by one Celsius degree.
· Total heat is the heat is the sum of latent heat and sensible heat.
Sensible heat
Total heat
Latent heat
Specific heat
Which of the following equations describes a Joule
Hint: Joule is the unit of energy and is equal to the amount of work done when a force of …….. Displaces a mass through a distance of one meter in the direction of that force.
1kJ/s
1W/s
1Nm
1W/m
What is the specific heat capacity for water under atmospheric conditions
Hint: The specific heat capacity of water is ........ Joules per kilogram per degree Celsius (J/kg°C). This means that it takes ........ J to raise the temperature of 1 kg of water by 1°C.
1kj/kg/⁰C
3.14kj/kg/⁰C
4.18kj/kg/⁰C
9.18kj/kg/⁰C
What is the correct calculation to determine the volume of a cylinder
Hint: can you work out the formula for cylinder volume from the image
3.14 x radius2 x height
3.14 x diameter x height
Diameter / height x (3.14)2
3.14 x diameter2
