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Worksheetssanitation ph23
Total questions: 72
Worksheet time: 36mins
Where are the statutory requirements for the installation of drainage systems?
BS 6700
BS EN 12056
Building regulations
WRAS
Identify this type of stack system.
Primary ventilated stack
Secondary ventilated stack
Ventilated discharge branch stack
Stub stack
If a discharge branch has a gradient of 18mm per metre and the branch is 3 metres in length, what will the vertical drop distance be?
54mm
18mm
36mm
72mm
What is the purpose of the component shown below, when installed at the base of the stack?
To prevent evaporation
To prevent backflow
To prevent expansion
To prevent compression
The maximum recommended length of a discharge pipe from a bath connected to a primary ventilated stack is:
3 metres
4 metres
5 metres
6 metres
What is the recommended termination, as per building regulations, for a soil stack inside a building?
Open ended
Cowl
Domical cage
Air admittance valve
What is the minimum sized waste that is allowed to be fitted to a wash basin?
32mm
40mm
50mm
100mm
What is the main purpose of a ventilated branch pipe?
To prevent positive and negative pressure fluctuations
To prevent odours from the waste of the appliance
To reduce the velocity of the waste water
To prevent compression
What is recommended to stop cross-flow in a soil stack opposite a WC?
Boss strap
No connections for 100mm
Air admittance valve
No connections for 200mm
If an air admittance valve is located within some boxing, what is required to allow the valve to operate effectively?
Access from the loft area
Additional ventilation in the boxing
The boxing must be sealed
Only one appliance can be discharged at any one time
An air admittance valve fitted to a stub stack helps to prevent what?
Compression
Capillary action
Trap seal loss
Stabilisation
What is the most suitable application for the trap in the image below?
Urinal
Washing machine
Bidet
Bath
What is the minimum trap seal depth for a WC pan, when connected to a primary ventilated stack?
38mm
50mm
75mm
100mm
What device, fitted to the top of sanitary pipework, allows air into a system but does not allow foul smells to escape?
Waterless valve
Neoprene membrane
Cage terminal
Air admittance valve
What component is shown in the image below?
Waterless valve
In-line trap
Air admittance valve
S trap
What component is shown in the image below?
Waterless valve
In-line trap
Air admittance valve
S trap
What are the four sanitary pipework systems used in the UK?
Primary ventilated stack system, secondary ventilated stack system, ventilated branch discharge system, stub stack
System I, System II, System III, System IV
Single stack system with partly filled branch discharge pipes, single discharge stack with small bore discharge branch pipes, single stack system with full bore branch discharge pipes, separate discharge stack system
Ventilated branch discharge system, secondary ventilated stack system, stub stack, air admittance valve
What is the maximum length of a 32mm waste pipe outlet from a washbasin with no bends that connects to a primary ventilated stack?
1.7m
3.0m
4.0m
6.0m
How would the installation requirements be affected if bends had to be fitted to the waste pipe of the washbasin mentioned above?
The measurements would be drastically reduced
The measurements would remain the same
The measurements would be increased
The measurements would not be affected
What type of bends should be avoided at the base of a soil stack?
Knuckle bends
Long radius bends
Right angle bends
U-bends
Which part of the Building Regulations deals with foul water drainage?
Part H1
Part G
Part F
Part L
What type of traps are most suitable for appliances connected to a primary ventilated soil stack?
P traps
S traps
U traps
Bottle traps
Can the waste pipe diameter be reduced at the outlet of a trap?
Yes
No
Only for certain traps
Only if approved by a professional
Macerators offer a solution where access to the main soil stack is not practical from a conventional gravity outlet appliance.
True
False
According to the Building Regulations, what should any dwelling have at least?
One closet and one washbasin
Two closets
One washbasin and two closets
Two washbasins
what is the preferred method of jointing plastic waste pipe.. it should be (a) weld, over push fit.
What is the recommended fall on the horizontal outlet pipework of a macerator?
1:100
1:50
1:20
1:10
Which of the following is a feature of the sink waste disposal unit?
Thermal trip cut-off device
Manual grinding tool
Automatic cleaning system
Water recycling unit
What should learners be able to explain by the end of the session regarding sanitary appliances pipework systems for dwellings?
The cost of sanitary appliances
Factors that affect the selection of sanitary appliances pipework systems
The color options for sanitary appliances
The brands of sanitary appliances
What are learners expected to identify to size and select sanitary appliances pipework system?
The latest trends in sanitary appliances
Information sources required
The best tools for installation
The warranty period of the appliances
Which factor is specifically related to the user's personal preferences?
Environmental impacts
Client's taste
Legislation
Local planning authority requirements
What is a regulatory factor that must be considered when selecting a sanitary appliance or pipework system?
Space and access
Energy efficiency
Legislation
Existing decor
What is the diameter of the waste pipe connected to the sink in the primary ventilated stack system diagram?
32mm
40mm
50mm
100mm
What is the minimum diameter required for a soil and vent pipe (SVP) in the primary ventilated stack system diagram?
32mm
40mm
75mm
100mm
According to the primary ventilated stack system diagram, what is the minimum diameter of a waste pipe that can be connected directly to a WC?
32mm
40mm
50mm
100mm
What is the purpose of the main discharge stack in a secondary ventilated stack system?
To provide a source of water for the system
To act as a safeguard against positive and negative air pressure fluctuations
To directly heat the water in the system
To collect sewage from individual branch discharge pipes
How much air is required to maintain equilibrium within the system for every 1m³ of water utilised in a secondary ventilated stack system?
10m³ of air
20m³ of air
30m³ of air
40m³ of air
What is the function of the rodding eye in a secondary ventilated stack system?
To regulate the flow of water
To provide access for cleaning and clearing blockages
To measure the amount of water in the system
To act as an additional water supply
If a 50 mm waste pipe exceeds its maximum length, what is the next size up it should be increased to?
32 mm
40 mm
50 mm
100 mm
According to the table, what is the maximum length for a 100 mm pipe?
6.0 m
4.0 m
3.0 m
1.7 m
What happens to the measurements if pipework is too steep or if bends are introduced?
They remain the same
They decrease
They increase
They change
What is the maximum permissible pipe length (in meters) for a wash hand basin or bidet with a diameter of 32 mm?
1.7
3.0
3.03
No limit
What can back pressure or positive pressure above bends and offset in the stack cause?
Enhanced water flow
Foul air to be blown through the trap water seal
Increased water temperature
Reduced noise in the plumbing system
What size pipe is typically used for a sink, bath, shower, urinal, or sanitary towel macerator?
32mm
40mm
50mm
100mm
What is the most suitable method of joining a MDPE buried water mains
Solvent welding
Any cheap fitting off the internet
Electro fusion welding
Brass compression fittings
Why is water mains pipe buried to a minimum depth of 760mm
So you will not hit it with a garden shovel when planting flowers
To avoid other services
To absorb ground subsidence
To prevent damage from freezing
What is the main purpose of the Water Supply (water fittings) Regulations 1999?
To prevent backflow contamination and wastage of water
To specify the dimensions of sanitary appliances
To ensure proper installation of drainage systems
To regulate the materials used in sanitary appliances
Which material is described as 'Hygienic, Stain proof, Resistant to acid and alkali'?
Acrylic
Fireclay
Stainless steel
Vitreous china
What is the full flush volume for modern WCs since 1999?
7 litres
4 litres
9 litres
6 litres
Which style of WC is popular because the cistern is completely concealed from view?
Close coupled
Low level
High level
Back to wall (concealed)
Which material is described as 'Very robust, Very heavy, Cold to touch'?
Acrylic
Enamelled cast iron
High impact plastic
Porcelain enamelled pressed steel
What is the traditional way to flush a toilet?
Using a drop valve
Using a dual flush valve
Using a siphon
Using a flap valve
What is the most common installation height for kitchen sinks?
1000mm
900mm
800mm
700mm
Name the WC Pan shown
Washdown pan with single trap
Double trap siphonic pan
Single trap siphonic pan
Name the WC Pan shown
Washdown pan with single trap
Double trap siphonic pan
Single trap siphonic pan
This picture shows a?
Waste manifold
Long radius bend
Strap boss
intumescent collar
The lowest connection to the soil stack must be a minimum of how many mm for a two story building?
150 mm
300 mm
450 mm
750 mm
Select the correct PVCu profile: Half round
Identify the diagram shown.
A primary ventilated stack
A secondary ventilated stack
A ventilated branch system
A stub stack
Identify this stack system
Stub System
Primary Stack System
Secondary Ventilated System
Ventilated Discharge Branch system
Identify this stack system
Stub System
Primary Stack System
Secondary Ventilated System
Ventilated Discharge Branch system
Identify this stack system
Stub System
Primary Stack System
Secondary Ventilated System
Ventilated Discharge Branch system
Identify this below ground drain system
Combined system
Separate system
Partially separate system
Identify this below ground drain system
Combined system
Separate system
Partially separate system
Identify this below ground drain system
Combined system
Separate system
Partially separate system
What is the Trap Seal Depth when fitted to a primary ventilated system (BS EN 12056-02) of a Wash Basin pipe size of 32mm Diameter
75mm
50mm
25mm
100mm
What is the Trap Seal Depth when fitted to a primary ventilated system (BS EN 12056-02) of a Bath pipe size 40mm Diameter
75mm
50mm
25mm
100mm
Name the flushing mechanism in the cistern shown.
Siphon flushing mechanism
Drop valve flushing mechanism
Air valve flushing mechanism
Electronic valve flushing mechanism
What size waste pipe is used to connect a bath waste to a soilstack
110mm
32mm
40mm
50mm
On a ventilated branch system, each branch is ventilated no more than how far from the appliances?
500mm
750mm
1000mm
1250mm
How is trap seal loss measured?
Using a take measure
Using your finger
Using a plunger
Using a dipstick
Identify the type of trap
P trap
S trap
running trap
bath trap
