WorksheetsL2 Above Ground Drainage Systems Pt4
Total questions: 29
Worksheet time: 15mins
Sanitary appliances are designed to safely discharge which of the following?
Wholesome water
Soil and Waste water
Gas and Oil
Green water recycling
Which type of trap is shown in the image?
A bottle trap
An anti-vac bottle trap
A P trap
A gevak style trap
From the descriptions below, state which one is not a true description of a WC pan?
Double trap
Siphonic
Washdown
Ascending spray
State the stack size requirements for a system for waste discharge only
110mm to be used regardless
82mm if the building is less than 3 storeys
Equal to the largest diameter trap outlet or branch discharge connection
75mm
What is the most important design consideration regarding access when installing a shower tray?
The type and colour of the sealant
The location of the waste trap
Thermal expansion
The weight of the tray
The diagram shows which type of drainge system?
Combined system
A partially combined system
A separate system
A partial 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
2.0m
2.5m
The seal used to connect a plastic siphon to the inner body of a WC cistern would be achieved by using which of the following?
Putty
A rubber washer
Hemp and Paste
Silicone sealant
Pop-up wastes are used on a range of appliances, if one was found to be allowing water to pass by when it is in the closed position, what would be the first thing to check?
The trap
The adjustment setting on the rise and fall spindle on the pop-up waste section
The length of the plug chain
Compression at the base of the stack
When notching a timber joist, what is the maximum amount you can cut in relation to the depth of the joist?
1/2
1/4
1/6
1/8
Select the correct minimum diameter dimension of any ventilating pipe to a single appliance which is connected not more than 15m from the secondary ventilated system?
15mm
22mm
25mm
32mm
A waste pipe discharging into a ground level gully should do which of the following?
Discharge over a 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
When drilling into masonry to install sanitary pipework while the house is occupied, which of the following situations must you prevent?
Dust in the air
Make a hole too round
Making noise
Disturb the surface of the wall
If a 4 metre 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
Which of the appliances listed would you install in a bathroom?
Sink and food macerator
Wash hand basin, bath and WC
WC, bath and sink
none of the above
The image shown shows a fixing which would be used in the installation of which of the following appliances?
A wall hung WC
A wash hand basin fixed to the wall without a pedestal
A combined towel hook and cup holder
A shower unit with hose loop
What do you think is the most likely reason for the problem which is evident on the lower pipe shown?
Insufficient pipe support
Very hot water temperature
Pipe run too long
Insufficient gradient
The purpose of sanitary appliances installed in dwellings is designed to reduce or remove the risk of which of the following?
Explosive ignition
Diseases
Hygiene
Acoustic transmissions
The Water Regulations state which of the following to be the maximum flushes for a WC?
4 Litre short flush and 6 litre long flush
10litre long flush and 6 litre short flush
9 litre long flush and 6 litre short flush
3 litre short flush and 5 litre 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 high level
A spray entering the bidet from the base of the appliance
The picture 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 double trap
Siphonic with double trap
What is the minimum radius of a bend on a soil stack when it connects to the below ground drainage?
450mm
750mm
200mm
100mm
A kitchen sink waste discharge pipe should have a minimum diameter of which of following?
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
Occasional open
Remain in the mid position
Within what distance should a ventilating pipe be to a reap when connected to a branch serving a wash hand basin which discharges into a secondary ventilated system?
750mm
450mm
300mm
350mm
The image shows a component that helps prevent which sanitary problem?
Cross flow
Compression
Air admittance
The use of bends
What is the correct medium that the above ground sanitation system are tested with?
Oil
Air
Water
Hydrogen
Select from the following the best temporary method of preventing contamination of your work by accidental operation of appliances
Remove all the appliances
Cap off all relevant branches
Isolate the soil stack with a drain plug upstream of your work area
Carry out work quickly
When permanently removing a sanitary device that discharges into a floor gully, which components should be removed?
The gully
The waste trap and pipework
The trap
The pipework only
