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WorksheetsSanitation System
Total questions: 21
Worksheet time: 11mins
What is the minimum size of ventilating pipe to any single appliance?
32mm
25mm
15mm
45mm
When should a Stub Stack be used?
When there are other stacks directly ventilated to air
When the appliances are further away from the soil stack
When the connection from the invert of the drain to the connection to the highest appliance exceeds 2m
When the main discharge stack is large enough to limit pressure fluctuations
According to Design Recommendations for Discharge Stacks, what should be the minimum radius bend at the foot of any discharge stack?
250mm radius
200mm radius
150mm radius
100mm radius
What is the recommended minimum diameter of the main ventilation stack?
60mm
50mm
70mm
75mm
What is the maximum length of a 32mm waste pipe outlet from a washbasin with no bends that connects to a primary ventilated stack?
1.7m
3.0m
4.0m
6.0m
What type of traps are most suitable for appliances connected to a primary ventilated soil stack?
P traps
S traps
U traps
Bottle traps
Can the waste pipe diameter be reduced at the outlet of a trap?
Yes
No
Only for certain traps
Only if approved by a professional
On a ventilated branch discharge system, water trap seals are protected from induced or self-siphonage because a vent pipe is located not more than what dimension from any appliance?
500mm
750mm
1000mm
1500mm
What is the maximum distance allowed for a stub stack to be connected to a ventilated discharge stack or drain?
3 metres
6 metres
9 metres
12 metres
What are the three methods of below ground drainage that can be used to discharge water from sanitary appliances?
The separate system, The combined system, The integrated system
The separate system, The partially separate system, The integrated system
The separate system, The partially separate system, The combined system
The combined system, The partially combined system, The integrated system
What is another name for the partially separate system?
The separate system
The integrated system
The partially combined system
The combined system
What is one of the main problems with the combined system of below ground drainage?
Foul water drains are not flushed through during heavy rainfall.
System planning can be troublesome.
It is extremely expensive to install.
During periods of heavy rain, the drainage system can become flooded.
Which factor can lead to trap seal loss in sanitary pipework systems?
The waste pipe has been laid to the wrong gradient
The waste pipe is too wide
The wastepipe is too short
The waste pipe has too many bends
What is the term for trap seal loss caused by one appliance 'pulling' the trap of another appliance?
Self-siphonage
Induced siphonage
Compression
Wavering out
What is being described when 'a bucket of water being poured down a sink may cause trap seal loss'?
Self-siphonage
Momentum
Induced siphonage
Compression
Which trap seal loss can occur because of an incorrect fall/gradient?
Induced siphonage
Self-siphonage
Momentum
Compression
Which form of trap seal loss is caused by one appliance 'pulling' the trap of another appliance?
Self-siphonage
Induced siphonage
Momentum
Compression
What is the meaning of sanitation?
the maintenance of clean condition that will prevent food contamination or foodborne illness.
the presence of harmful item in food.
the transferring of germs from one item to another item.
the physical removal of soil and dirt.
What are the three sections of sanitary pipework?
The wet pipe, the dry pipe, and the waste pipe
The primary stack, the secondary stack, and the branch stack
The main pipe, the secondary pipe, and the discharge pipe
The soil pipe, the vent pipe, and the waste pipe
What kind of bend should be installed at the foot of the stack?
A short radius bend
A long radius bend
A 90-degree bend
A 180-degree bend
What is the correct name for a waste pipe with a direct connection to drain?
Discharge stack
Vent pipe
Gully connection
Stub waste connection
