WorksheetsPlumbing Traps Quiz
Total questions: 46
Worksheet time: 23mins
What is the primary purpose of a trap under an appliance?
To enhance water flow
To stop noxious smells from entering the property
To increase water pressure
To prevent water leakage
What material are the majority of traps made from?
Steel
Polypropylene
Glass
Wood
Which of the following is a common jointing method for traps?
Welding
Soldering
Push-fit
Gluing
What is the minimum depth required for a trap seal when the trap diameter is 50mm or above?
30mm
40mm
50mm
60mm
Why do larger diameter traps become more difficult to lose the trap seal?
They contain less water
They are more prone to evaporation
They contain more water
They are easier to clean
What is the purpose of the trap seal depth in plumbing?
To increase water pressure
To stop noxious smells from entering the property
To improve water flow speed
To reduce water temperature
What is the waste fitting size for a washbasin?
1¼”
1½”
40mm
100mm
What is the trap diameter for a bidet?
32mm
40mm
75mm
100mm
What is the seal depth for soil stack for a shower?
50mm
75mm
40mm
100mm
Which appliance has a trap diameter of 100mm?
Washing machine
Dishwasher
WC pan
Bowl urinal
What is the seal depth for soil stack for a bowl urinal?
50mm
75mm
40mm
100mm
What is the minimum trap seal depth required for a gulley?
38mm
25mm
50mm
75mm
Which of the following appliances can discharge into a gulley trap?
Sinks
Toilets
Washing machines
Dishwashers
What type of water cannot be discharged into a gulley trap?
Foul water
Rainwater
Clean water
Greywater
Why can a bath and shower have a shallower seal depth compared to a tapered appliance?
They are smaller and tapered.
They are larger and flat-bottomed.
They discharge water more quickly.
They have a deeper seal.
What is the effect of the flat bottom of a bath and shower tray on water drainage?
It causes water to drain away quickly.
It prevents water from draining.
It maintains the trap seal by allowing the last small amount of water to drain away.
It increases the water flow rate.
What is the waste fitting size for a washbasin?
1¼”
1½”
40mm
100mm
What is the trap diameter for a shower?
32mm
40mm
50mm
100mm
What is the seal depth for soil stack for a WC pan?
75mm
50mm
32mm
40mm
Which appliance has a waste fitting size of 1½”?
Washbasin
Bowl urinal
Shower
Dishwasher
What types of swivel traps are mentioned in the document?
P, S, and U styles
P, S, and running styles
P, Q, and running styles
S, U, and running styles
What feature allows the swivel trap to have multiple positions and connection options?
A flexible hose
A rotating valve
A union connection in the center
A sliding joint
What is the missing value in the diagram?
Option A: 42
Option B: 36
Option C: 50
Option D: 45
Why are P and S traps named as such?
Because of their color
Because of their size
Because of their shape
Because of their material
When is a P trap commonly installed?
When the discharge branch is vertical
When the discharge branch is horizontal
When the discharge branch is diagonal
When the discharge branch is circular
When is an S trap commonly installed?
When the initial waste pipe is horizontal
When the initial waste pipe is vertical
When the initial waste pipe is diagonal
When the initial waste pipe is circular
What is the primary purpose of using running traps in appliances?
To increase water pressure
To trap appliances separately
To enhance appliance efficiency
To reduce appliance noise
Where is the running trap installed?
Under the appliance
In the water supply line
In the discharge branch
Inside the appliance
What is the purpose of a slimline or pedestal trap under a washbasin?
To enhance the aesthetic of the washbasin
To allow waste to be hidden behind the pedestal
To increase water flow speed
To reduce water usage
Which type of trap is specifically designed for use under a washbasin?
U-bend trap
Slimline or pedestal trap
Bottle trap
Drum trap
What is a washing machine trap used for?
To connect a washing machine to a water supply
To support the washing machine on uneven floors
For a washing machine or dishwasher that has a pumped discharge
To filter water before it enters the washing machine
What is the height of the extended P trap mentioned in the document?
500mm
600mm
700mm
800mm
Where is the discharge hose located in relation to the trap?
Below the trap
Inside the trap
Over the top of the trap
Next to the trap
What is a spigot trap commonly used for?
To connect a garden hose
To cater for a washing machine or dishwasher
To filter drinking water
To store rainwater
Where is a spigot trap commonly located?
Above a sink
Inside a refrigerator
Below a sink
On the roof
What is a spigot trap a variance of?
S trap
U trap
P trap
J trap
What is the allowed depth of seal for bath traps under a fitted bath?
50mm
38mm
25mm
60mm
If a bath is discharging to a hopper or gulley trap, what is the allowed trap seal?
50mm
38mm
25mm
60mm
Why are bottle traps not suited for use under a sink?
They are too large to fit under a sink.
They are too expensive.
They restrict the flow of water.
They are difficult to install.
Where are chrome finish bottle traps sometimes installed?
In concealed waste pipes
In exposed waste pipes
In water supply lines
In electrical conduits
What is the depth of seal for shower traps?
30mm
40mm
50mm
60mm
What feature do shower traps include for cleaning?
Fixed waste grill
Removable waste grill
Non-removable cover
Permanent seal
What is the purpose of using anti-vac or resealing traps?
To prevent water overflow
To enhance water pressure
To prevent trap seal loss due to siphonage
To increase water temperature
When should a standard trap be used instead of an anti-vac trap?
When the system is poorly designed
When the system is correctly designed and installed
When additional appliances are added
During an air test
Why are anti-vac traps not advised on new installations?
They are too expensive
They may not hold during an air test
They are difficult to install
They increase water usage
What is the purpose of the small air admittance valve in these traps?
To allow a small amount of air into the waste pipe under negative pressure
To increase water flow through the pipe
To block air from entering the waste pipe
To enhance the aesthetic appearance of the trap
