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Sanitary Appliances Pipework Systems Quiz

Total questions: 52

Worksheet time: 26mins

Name
Class
Date
1.

What is the maximum distance for a 32mm waste pipe from the appliance to the soil stack?

a)

1.7m

b)

3.0m

c)

4.0m

d)

6.0m

2.

What is the maximum distance for a 100mm waste pipe from the appliance to the soil stack?

a)

1.7m

b)

3.0m

c)

4.0m

d)

6.0m

3.

What is the recommended diameter for a waste pipe connected to a washing machine or dishwasher?

a)

32mm

b)

40mm

c)

50mm

d)

100mm

4.

What is the pipe size range for a WC branch?

a)

32 mm

b)

40 mm

c)

75–100 mm

d)

50 mm

5.

What is the maximum length for a wash basin and bidet pipe?

a)

3 mm

b)

1.7 mm

c)

6 mm

d)

4 mm

6.

What is the gradient range for a washing machine/dishwasher pipe?

a)

18–22 mm/m

b)

18–90 mm/m

c)

18 mm/m

d)

22–90 mm/m

7.

What is the trap seal depth for a bath?

a)

50 mm

b)

75 mm

c)

100 mm

d)

40 mm

8.

What should be done if the pipe length exceeds the maximum for 40mm appliances?

a)

Use a 32mm pipe

b)

Increase to 50mm pipe

c)

Decrease the gradient

d)

Use a 75mm pipe

9.

What are the most common domestic waste pipe sizes?

a)

25mm, 35mm, 45mm

b)

32mm, 40mm, 110mm

c)

30mm, 50mm, 100mm

d)

20mm, 40mm, 100mm

10.

When is a 50mm waste pipe size used?

a)

When only one appliance is connected

b)

When more than one appliance is using the same waste pipe

c)

When the pipe is longer than 10 meters

d)

When the pipe is made of metal

11.

What size waste pipes are used for appliances that use more water?

a)

32mm

b)

40mm

c)

50mm

d)

25mm

12.

Which of the following appliances would use a 32mm waste pipe?

a)

Kitchen sink

b)

Shower

c)

Basin

d)

Washing machine

13.

Which appliance is NOT typically connected to a 40mm waste pipe?

a)

Bath

b)

Bidet

c)

Kitchen sink

d)

Shower

14.

What is the common diameter for a domestic soil stack?

a)

110mm

b)

90mm

c)

150mm

d)

75mm

15.

What is the purpose of waste pipes in a plumbing system?

a)

To supply clean water to appliances

b)

To lead waste water away from the appliance to the soil stack

c)

To store waste water temporarily

d)

To filter waste water before disposal

16.

What is the minimum distance from the drain invert level for the lowest connection to the soil stack in low-rise buildings?

a)

450mm

b)

500mm

c)

600mm

d)

750mm

17.

For buildings up to five storeys, what is the minimum distance from the drain invert level for the lowest connection to the soil stack?

a)

450mm

b)

500mm

c)

750mm

d)

900mm

18.

What is a stub stack system used for in plumbing?

a)

Connecting a group of appliances directly to a drain

b)

Increasing water pressure

c)

Heating water

d)

Filtering water

19.

What is the maximum distance allowed from the invert of the drain to the highest connection of an appliance before ventilation is required?

a)

1 metre

b)

2 metres

c)

3 metres

d)

4 metres

20.

What is the maximum distance allowed between the crown of the WC connection and the drain inverts before ventilation is required?

a)

0.5 metres

b)

1.3 metres

c)

2 metres

d)

2.5 metres

21.

How can ventilation to the soil stack be achieved?

a)

By using a water pump

b)

By installing a filter

c)

By means of an air admittance valve (AAV)

d)

By increasing pipe diameter

22.

What is the maximum distance a stub stack can be installed from a ventilated discharge stack or drain?

a)

6 metres

b)

8 metres

c)

10 metres

d)

12 metres

23.

What is the maximum loading for a stub stack system before an AAV should be fitted?

a)

3L/s

b)

4L/s

c)

5L/s

d)

6L/s

24.

To what distance is the maximum installation length increased when a group of appliances is fitted?

a)

8 metres

b)

10 metres

c)

12 metres

d)

14 metres

25.

What is the maximum height for H1 in Scotland according to the stub stack system?

a)

2m

b)

1.5m

c)

1.3m

d)

1m

26.

In England and Wales, what is the maximum height for H3 in the stub stack system?

a)

2m

b)

1.5m

c)

1.3m

d)

1m

27.

What is the maximum distance for a single appliance in the stub stack system?

a)

6m

b)

12m

c)

8m

d)

10m

28.

For a group of appliances, what is the maximum distance allowed in the stub stack system?

a)

6m

b)

12m

c)

8m

d)

10m

29.

According to the Building Regulation Approved Document Part H, where should a branch pipe discharging to a gully terminate?

a)

Above the grating or sealing plate

b)

Below the water seal

c)

Between the grating or sealing plate and the top of the water seal

d)

At the bottom of the gully

30.

What is the minimum diameter required for the pipework connecting condensate drainage from boilers to sanitary pipework?

a)

15mm

b)

22mm

c)

50mm

d)

75mm

31.

What size condensate trap should be used when connecting condensate drainage from boilers to sanitary pipework?

a)

50mm

b)

60mm

c)

75mm

d)

100mm

32.

What is the purpose of installing a long radius bend at the base of a soil stack?

a)

To increase water pressure

b)

To maintain effluent velocity during vertical to horizontal movement

c)

To reduce water temperature

d)

To prevent pipe corrosion

33.

What alternative can be used instead of a long radius bend in some systems?

a)

Two 90º connectors

b)

Two 45º connectors

c)

A straight pipe

d)

A U-bend

34.

What issue did older systems face due to the lack of a long radius bend?

a)

Increased water temperature

b)

Compression or back pressure for the discharge

c)

Pipe corrosion

d)

Reduced water flow

35.

What is the purpose of a ventilated branch discharge system in plumbing?

a)

To increase water pressure

b)

To prevent trap seal loss

c)

To reduce water temperature

d)

To enhance water flow speed

36.

How far should a vent pipe be located from any appliance to protect water trap seals?

a)

500mm

b)

1000mm

c)

750mm

d)

250mm

37.

What is the function of air admittance valves (AAV) in a plumbing system?

a)

To increase water flow

b)

To allow air into the system without letting odors escape

c)

To decrease water pressure

d)

To filter impurities from water

38.

What is the purpose of a main ventilating stack in a sanitary pipework system?

a)

To provide structural support

b)

To allow air circulation and prevent siphoning

c)

To increase water pressure

d)

To filter waste materials

39.

Which component connects directly to the sewer in a ventilated branch discharge system?

a)

Main ventilating stack

b)

Branch discharge pipe

c)

Main discharge stack

d)

Rodding eye

40.

In a secondary ventilated stack system, what is the purpose of ventilating only the main discharge stack?

a)

To safeguard against air pressure fluctuations

b)

To increase water flow speed

c)

To reduce pipe diameter

d)

To prevent water overflow

41.

What must the ventilating pipe do in relation to the appliance in a secondary ventilated stack system?

a)

Rise away from the appliance

b)

Descend towards the appliance

c)

Remain level with the appliance

d)

Connect below the spillover level

42.

What is the minimum diameter for a ventilating pipe that is less than 15m long?

a)

25mm

b)

20mm

c)

30mm

d)

32mm

43.

If a ventilating pipe is longer than 15m, what should its minimum diameter be?

a)

32mm

b)

25mm

c)

20mm

d)

28mm

44.

What is the minimum diameter of the main ventilating stack or any dry part of the primary ventilating stack?

a)

50mm

b)

75mm

c)

100mm

d)

125mm

45.

Why is the system with secondary ventilation commonly seen in existing multi-occupancy buildings?

a)

It is cheaper to install.

b)

It requires less maintenance.

c)

It enables less restriction on the location of appliances.

d)

It uses less energy.

46.

What is the required diameter of the main discharge stack for buildings with up to five storeys?

a)

50mm

b)

100mm

c)

150mm

d)

200mm

47.

For buildings up to how many storeys is a 150mm diameter stack required?

a)

5 storeys

b)

10 storeys

c)

15 storeys

d)

20 storeys

48.

How many groups of appliances do the given figures apply to on each floor?

a)

One group

b)

Two groups

c)

Three groups

d)

Four groups

49.

What appliances are included in one group of appliances?

a)

WC, shower, basin, and sink

b)

WC, bath, basin, and sink

c)

WC, bath, shower, and sink

d)

WC, bath, basin, and shower

50.

What is the purpose of a secondary ventilating stack in a plumbing system?

a)

To provide additional water supply

b)

To prevent sewer gases from entering the building

c)

To increase water pressure

d)

To reduce water temperature

51.

Which component connects to the main discharge stack in a secondary ventilated stack system?

a)

Rodding eye

b)

Branch discharge pipe

c)

Water heater

d)

Pressure valve

52.

What is the purpose of positioning the access cover above the spill-over level of the highest appliance in sanitary pipework?

a)

To prevent blockages

b)

To allow easy access for maintenance

c)

To ensure proper ventilation

d)

To avoid water overflow

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