Worksheets6035 - Drainage Outcome 2 part 1
Total questions: 57
Worksheet time: 29mins
What is the primary purpose of a trap under an appliance?
To prevent water leakage
To stop noxious smells from entering the property
To enhance the appliance's efficiency
To provide additional support to the appliance
What material are the majority of traps made from?
Brass
Copper
Polypropylene
Chrome
Which of the following is NOT a material mentioned for making traps?
Polypropylene
Brass
Copper
Steel
What is the more common jointing method for traps?
Welding
Soldering
Compression using a rubber seal
Gluing
What is the minimum depth required for a trap seal if the trap diameter is 50mm or above?
25mm
30mm
50mm
75mm
Why do larger diameter traps contain more water and become more difficult to lose the trap seal?
Due to increased evaporation
Due to induced siphonage, waving-out, or compression
Due to decreased water pressure
Due to increased air flow
What is the trap seal depth?
The depth of the pipe.
The retained depth of water stopping the noxious smell entering the property.
The height of the water column.
The width of the pipe.
What is the waste fitting size for a washbasin?
1¼
1½
40mm
75mm
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 waste fitting size of 1½?
Washbasin
Bidet
Bowl urinal
WC pan
What is the trap diameter for a washing machine?
32mm
40mm
75mm
100mm
What is the seal depth for soil stack for a WC pan with a 75mm trap diameter?
50mm
75mm
40mm
100mm
Which of the following appliances can discharge into a gulley trap or hopper head?
Toilets
Sinks
Washing machines
Dishwashers
What is the minimum trap seal depth required for a gulley?
25mm
38mm
50mm
75mm
Which of the following statements is true about gulley traps and hopper heads?
They can have foul water discharged into them.
They are dependent on the soil stack systems.
Only sinks, showers, basins, and baths can discharge into them.
They require a minimum of a 50mm trap seal.
Why can a bath and shower have a shallower seal depth?
Because they are smaller and tapered.
Because they are larger and flat-bottomed.
Because they are made of metal.
Because they are used less frequently.
What is the effect of a bath and shower being larger and flat-bottomed?
They discharge water more quickly.
They discharge water more slowly.
They do not discharge water at all.
They discharge water at the same rate as a tapered appliance.
What maintains the trap seal in a bath and shower tray?
The tapered bottom of the tray.
The flat bottom of the tray.
The material of the tray.
The frequency of use.
What is the waste fitting size for a washbasin?
1¼
1½
40mm
100mm
What is the trap diameter for a bidet?
32mm
40mm
50mm
75mm
What is the seal depth for soil stack for a shower?
32mm
40mm
50mm
75mm
What is the waste fitting size for a bowl urinal?
1¼
1½
40mm
100mm
What is the trap diameter for a washing machine?
32mm
40mm
50mm
75mm
What is the seal depth for soil stack for a WC pan?
32mm
40mm
50mm
75mm
What types of styles do swivel traps come in?
P, S, or running styles
A, B, or C styles
X, Y, or Z styles
L, M, or N styles
What feature allows the trap to swivel through 360 degrees?
The union connection in the center
The length of the trap
The material of the trap
The diameter of the trap
Why are P and S traps named as such?
Because of their color
Because of their shape
Because of their size
Because of their material
When is a P trap commonly installed?
When the discharge branch is vertical to the appliance
When the discharge branch is horizontal to the appliance
When the discharge branch is diagonal to the appliance
When the discharge branch is parallel to the appliance
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 parallel
What might happen when a number of appliances are served by one discharge branch?
A P trap is installed
An S trap is installed
A U trap is installed
A J trap is installed
What is the primary reason for using running traps?
To trap appliances separately
To increase water pressure
To reduce noise
To improve water quality
Where is the running trap installed?
In the main water line
In the discharge branch itself
Under the appliance
In the water heater
What is one of the benefits of using running traps?
Increases water flow
Saves money
Reduces water temperature
Improves water taste
Which type of trap is specifically designed for use under a washbasin and allows the waste to be hidden behind the pedestal?
Slimline or pedestal trap
Bottle trap
Drum trap
Bell trap
What is a washing machine trap used for?
To filter water
To store water
For a washing machine or dishwasher that has a pumped discharge
To heat water
What type of trap is described in the document?
S trap
U trap
P trap
Q trap
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 cater for a washing machine or dishwasher
To filter drinking water
To store kitchen utensils
To ventilate a room
Where is a spigot trap commonly located?
Above a sink
Below a sink
Inside a refrigerator
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 designed for the restricted area under a fitted bath?
38mm
50mm
45mm
60mm
If a bath is discharging to a hopper or gulley trap, what is the allowed trap seal depth?
50mm
45mm
38mm
60mm
Why are bottle traps sometimes used under a washbasin?
They are inexpensive
They have a neat appearance
They are easy to install
They are highly durable
Why are bottle traps not suited under a sink?
They are too expensive
They are difficult to install
They can be restrictive to the flow of water
They are not durable
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 finish of the bottle traps mentioned in the document?
Brass
Copper
Chrome
Plastic
What is the depth of seal for shower traps?
30mm
40mm
50mm
60mm
What is an integral part of shower traps that allows for cleaning?
Fixed waste grill
Removable waste grill
Non-removable waste grill
Permanent waste grill
Shower traps operate on a similar principle to which other type of traps?
S-traps
P-traps
Bottle traps
Drum traps
What is the primary use of anti-vac or resealing traps?
To prevent trap seal loss due to siphonage
To increase water pressure
To reduce water temperature
To enhance water flow
When can a standard trap be used instead of an anti-vac trap?
When the system is designed and installed correctly
When the system is old
When the system is new
When the system has additional appliances
What can anti-vac traps alleviate?
The problem of trap seal loss if a system is upgraded or additional appliances are added
The problem of low water pressure
The problem of high water temperature
The problem of water contamination
Why are anti-vac traps not advised on new installations?
They may not hold during an air test
They are too expensive
They are difficult to install
They are not durable
What is the purpose of the small air admittance valve located on the body of these traps?
To allow a large amount of air into the waste pipe
To allow a small amount of air into the waste pipe under negative pressure
To prevent water from entering the waste pipe
To increase the water pressure in the waste pipe
What problem do these traps aim to avoid by allowing a small amount of air into the waste pipe?
Blockage
Siphonage
Overflow
Leakage
