Quiz about PP10 sanitation Plumbing Traps

Question 1

What is the purpose of a trap under an appliance in plumbing?

Accepted Answer

To stop the noxious smell from the soil stack entering the property

Answer

To regulate the water flow

Answer

To measure water usage

Answer

To filter out debris

Question 2

Where is the trap attached in a plumbing system?

Accepted Answer

To the underside of the waste fitting on the appliance

Answer

To the top of the waste fitting on the appliance

Answer

Outside the property

Answer

At the main water supply

Question 3

What are the majority of traps made from?

Accepted Answer

Polypropylene

Answer

PVC

Answer

Iron

Answer

Rubber

Question 4

Which of the following materials is NOT mentioned as a common material for traps?

Accepted Answer

Steel

Answer

Brass

Answer

Copper

Answer

Chrome plated

Question 5

What is a common jointing method used in traps?

Accepted Answer

Compression using a rubber seal

Answer

Soldering

Answer

Welding

Answer

Gluing

Question 6

What is the purpose of the trap seal depth in plumbing?

Accepted Answer

To retain water to prevent noxious smells from entering the property

Answer

To measure the amount of water used in a property

Answer

To control the flow of water through the pipes

Answer

To indicate the level of water contamination

Question 7

What is the waste fitting size for a bidet

Accepted Answer

40mm

Answer

32mm

Answer

NA

Answer

100mm

Question 8

What is the trap diameter required for a shower installation?

Accepted Answer

40mm

Answer

32mm

Answer

75mm

Answer

100mm

Question 9

what is the seal depth for soil stack for a washing machine?

Accepted Answer

75mm

Answer

32mm

Answer

40mm

Answer

50mm

Question 10

What is the seal depth for soil stack for a WC pan?

Accepted Answer

50mm

Answer

32mm

Answer

40mm

Answer

75mm

Question 11

Which appliance requires a waste fitting size of 40mm

Accepted Answer

Washing machine

Answer

Wash basin

Answer

Bidet

Answer

Bowl urinal

Question 12

What is the minimum trap seal depth required for a gully?

Accepted Answer

38mm

Answer

25mm

Answer

50mm

Answer

75mm

Question 13

Why can baths and showers have a shallower seal depth compared to other appliances?

Accepted Answer

They are larger and flat bottomed

Answer

They are smaller and tapered

Answer

They discharge water more quickly

Answer

They use less water

Question 14

Which appliances can discharge into a gully trap or a hopper head?

Accepted Answer

Sinks, showers, basins, and baths

Answer

Toilets and bidets

Answer

Washing machines and dishwashers

Answer

Rainwater gutters and downspouts

Question 15

When is a 'P' trap commonly installed?

Accepted Answer

When the discharge branch is horizontal to the appliance

Answer

When the discharge branch is vertical to the appliance

Answer

When multiple appliances are served by one discharge branch

Answer

When the initial waste pipe is vertical

Question 16

Under what circumstance is an 'S' trap commonly installed?

Accepted Answer

When the initial waste pipe that leads to the discharge branch is vertical

Answer

When the discharge branch is horizontal to the appliance

Answer

When the appliance is located outdoors

Answer

When there is only one appliance connected to the discharge branch

Question 17

What is the purpose of a running trap in plumbing?

Accepted Answer

To save space and money by only requiring one trap

Answer

To allow multiple traps to be installed in the discharge branch

Answer

To increase the distance between the appliance and the trap

Answer

To make the installation process more complex

Question 18

Which type of trap is designed for use under a wash-hand basin and allows the waste to be hidden behind the pedestal?

Accepted Answer

Slimline, pedestal or straight through trap

Answer

Bottle trap

Answer

P-trap

Answer

S-trap

Question 19

What is the trap shown on the left side of the image called?

Accepted Answer

Slimline 'S' trap

Answer

P-trap

Answer

Bottle trap

Answer

Running trap

Question 20

What is the use of a washing machine trap?

Accepted Answer

To be used for a washing machine or dishwasher with a pumped discharge

Answer

To regulate the water temperature in a washing machine or dishwasher

Answer

To prevent sewer gases from entering the building

Answer

To filter out debris from the washing machine water

Question 21

What type of trap is a washing machine trap?

Accepted Answer

P trap

Answer

S trap

Answer

Q trap

Answer

U trap

Question 22

What is the height of an extended 'P' trap for a washing machine?

Accepted Answer

600mm

Answer

400mm

Answer

500mm

Answer

700mm

Question 23

Where is the discharge hose of a washing machine trap located?

Accepted Answer

Over the top of the trap within a supporting clip

Answer

Below the trap

Answer

Inside the trap

Answer

Detached from the trap

Question 24

What is the allowed depth of seal for bath traps designed for the restricted area under a fitted bath?

Accepted Answer

50mm

Answer

38mm

Answer

40mm

Answer

45mm

Question 25

If a bath is discharging to a hopper or gully trap, what is the allowed trap seal depth?

Accepted Answer

38mm

Answer

50mm

Answer

45mm

Answer

40mm

Question 26

Why are bottle traps not suitable as a sink trap?

Accepted Answer

They are restrictive to the flow of water.

Answer

They are too large for a sink.

Answer

They are not visually appealing.

Answer

They are too expensive.

Question 27

On what principle does a shower trap operate?

Accepted Answer

A similar principle to the bottle trap

Answer

A similar principle to the U-bend trap

Answer

A similar principle to the S-trap

Answer

A unique principle not related to other traps

Question 28

What is the depth of seal for a shower trap mentioned in the document?

Accepted Answer

50mm

Answer

25mm

Answer

75mm

Answer

100mm

Question 29

Does the shower trap include a feature for cleaning?

Accepted Answer

Yes, it includes access for cleaning via a removable waste grill

Answer

No, it is sealed permanently

Answer

Yes, it includes a non-removable waste grill

Answer

No, it is self-cleaning and requires no maintenance

Question 30

What is the purpose of anti-vac or resealing valves in plumbing systems?

Accepted Answer

To prevent trap seal loss due to siphonage

Answer

To increase water pressure in the pipes

Answer

To reduce water consumption

Answer

To filter impurities from the water

Question 31

When can a standard trap be used without the problem of trap seal loss?

Accepted Answer

When the system has been designed and installed correctly

Answer

When the system is old and needs upgrading

Answer

When the system has been designed and installed incorrectly

Answer

When additional appliances are added to the system

Question 32

Why are anti-vac traps not recommended for new installations?

Accepted Answer

They may not hold during an air test

Answer

They are too expensive

Answer

They cause blockages in the waste pipe

Answer

They increase the risk of water leaks

Question 33

What function does the small air admittance valve in anti-vac traps serve?

Accepted Answer

It allows a small amount of air into the waste pipe under negative pressure

Answer

It regulates the flow of water through the trap

Answer

It cleans the waste pipe

Answer

It seals the trap completely

Question 34

What is a self-sealing waterless valve used for in plumbing?

Accepted Answer

To create an air tight seal to stop noxious smell entering the property

Answer

To regulate the water pressure

Answer

To measure the amount of water used

Answer

To filter impurities from water

Question 35

Why is a self-sealing waterless valve not considered a trap?

Accepted Answer

Because it does not use a seal of water

Answer

Because it uses a seal of water

Answer

Because it filters impurities from water

Answer

Because it regulates the water pressure

Question 36

How does a self-sealing waterless valve function after the discharge has finished?

Accepted Answer

The membrane closes

Answer

The membrane remains open

Answer

The valve seals with water

Answer

The valve releases water

Question 37

What is the maximum diameter for waste pipes that may discharge directly into the back-inlet gully of a below-ground drainage system?

Accepted Answer

50mm

Answer

30mm

Answer

40mm

Answer

60mm

Question 38

Where must the waste pipe discharge in relation to the grating and water line in the gully?

Accepted Answer

Below the grating and above the water line

Answer

Above the grating and below the water line

Answer

Below both the grating and the water line

Answer

Above both the grating and the water line

Question 39

What is the purpose of ensuring that the waste pipe discharges below the grating but above the water line in the gully?

Accepted Answer

To ensure that an air break is maintained and no smells can enter the building

Answer

To prevent water from flowing back into the building

Answer

To increase the water pressure in the drainage system

Answer

To allow for easier cleaning of the waste pipe

Question 40

What is the minimum distance from the permitted opposing connection in the soil stack to the branch connection?

Accepted Answer

200mm

Answer

250mm

Answer

300mm

Answer

2.5 times the diameter of the pipe

Question 41

What range of drainage system sizes can WC pan connectors accommodate?

Accepted Answer

75mm to 110mm

Answer

50mm to 75mm

Answer

100mm to 150mm

Answer

110mm to 160mm

Question 42

Where is the access manhole located in relation to the WC connector?

Accepted Answer

externally but close to the building

Answer

Inside the WC

Answer

Above the finished floor level

Answer

Below the underground foul water drain

Question 43

What is one of the reasons for trap seal loss in plumbing?

Accepted Answer

Evaporation

Answer

Temperature increase

Answer

Water pressure

Answer

Pipe diameter

Question 44

Which of the following is not a reason for trap seal loss?

Accepted Answer

Water filtration

Answer

Momentum

Answer

Compression

Answer

Self-siphonage

Question 45

What can cause the water level in a trap to be lowered, leading to trap seal loss?

Accepted Answer

Induced siphonage

Answer

Water addition

Answer

Sealant application

Answer

Pipe expansion

Question 46

In which climates is evaporation of the trap seal water commonly experienced?

Accepted Answer

Warmer climates

Answer

Cooler climates

Answer

Humid climates

Answer

Dry climates

Question 47

Why is regular use important for the maintenance of the trap seal?

Accepted Answer

It helps in topping up the seal water

Answer

It prevents the accumulation of debris

Answer

It ensures the trap remains clean

Answer

It reduces the water bill

Question 48

What causes the water levels in the appliance traps to bob up and down, leading to trap seal loss?

Accepted Answer

Wind passing over the top of a soil stack

Answer

Changes in water temperature

Answer

Clogs in the plumbing system

Answer

Faulty plumbing fixtures

Question 49

What can assist with the problem of trap seal loss due to wind?

Accepted Answer

Installing a wind cowl

Answer

Tightening the pipes

Answer

Using heavier water

Answer

Decreasing the size of the soil stack

Question 50

what is the common name for wind turbulence affecting trap seal loss

Accepted Answer

wavering out

Answer

wandering about

Answer

stalling

Answer

induced

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