Worksheets6035 Drainage Outcome 1 part 2
Total questions: 43
Worksheet time: 22mins
What is a key feature of the secondary ventilated stack system?
It has a primary vent connected to the dry section of the stack.
It has a secondary vent connected from just above the long radius bend.
It has no vent system.
It has a vent system connected to the wet section of the stack.
What is the purpose of the secondary vent in a secondary ventilated stack system?
To reduce the airflow.
To increase the water flow.
To allow additional airflow and safeguard against pressure fluctuations.
To block the airflow.
In what type of buildings is a ventilated branch system typically used?
Residential homes
Public buildings
Small offices
Private houses
What is the maximum distance each branch is ventilated from the appliance in a ventilated branch system?
500mm
1000mm
750mm
600mm
What is one of the main benefits of ventilating each branch in a ventilated branch system?
Reduces water usage
Increases water pressure
Allows additional airflow
Decreases installation cost
What does the ventilation in each discharge branch safeguard against in a ventilated branch system?
Water contamination
Positive or negative pressure fluctuations
Pipe corrosion
Blockages
In a ventilated branch system, which direction do the discharge branches migrate?
Upwards
Downwards
Horizontally
Diagonally
What is the minimum size of the branch ventilating pipe for a single appliance in a ventilated branch system?
20mm
25mm
30mm
32mm
What is the minimum size of the branch ventilating pipe for multiple appliances in a ventilated branch system?
20mm
25mm
30mm
32mm
In a ventilated branch system, what is the purpose of the branch ventilating pipes migrating upwards?
To allow effluent to discharge
To prevent effluent from entering the vent system
To increase water pressure
To reduce water pressure
In a ventilated branch system, where must any branch ventilating pipe be connected?
Below the spillover level of the appliance
At the same level as the spillover level of the appliance
Above the spillover level of the appliance
At the base of the discharge stack
Which of the following is NOT a type of ventilated system shown in the image?
Primary ventilated system
Secondary ventilated system
Ventilated discharge branch system
Tertiary ventilated system
What is the primary function of the systems shown in the image?
To provide heating
To manage ventilation
To supply water
To discharge waste
Where can a soil stack terminate within a property?
Inside the loft area or ducting
Inside the basement
Inside the living room
Inside the kitchen
Where can a soil stack terminate outside the property?
To the atmosphere
To the garden
To the garage
To the driveway
What should not be allowed to penetrate the property in either case of soil stack termination?
Foul smell
Water
Air
Light
According to Building Regulations, what is the acceptable way to terminate a soil stack inside a building?
Installing a vent pipe
Installing an air admittance valve
Installing a water trap
Installing a pressure release valve
What does an air admittance valve allow?
It allows air in if the pressure fluctuates but does not allow foul air out.
It allows foul air out but does not allow air in.
It allows both air in and foul air out.
It does not allow air in or foul air out.
What is the main purpose of an air admittance valve (AAV)?
To allow air into the stack but not allow foul air into the building
To allow foul air into the building but not allow air into the stack
To allow both air and foul air into the building
To prevent both air and foul air from entering the building
What must be available if the AAV is situated inside boxing?
Access for maintenance and sufficient ventilation
Access for maintenance and no ventilation
No access for maintenance and sufficient ventilation
No access for maintenance and no ventilation
What must be followed when installing an air admittance valve?
Personal preferences
Manufacturer’s instructions
Local weather conditions
Neighbor’s advice
What is required to protect an air admittance valve from freezing?
Painting it
Insulation
Covering it with plastic
Placing it indoors
At what minimum height must an air admittance valve be installed above the highest spillover level?
0.5 meters
1 meter
1.5 meters
2 meters
What is the purpose of a stub stack in a drainage system?
To connect appliances directly to the drain
To increase water pressure
To filter water
To store excess water
When is ventilation required for a stub stack?
When the highest appliance is above 1 metre
When the highest appliance is above 2 metres
When the highest appliance is above 3 metres
When the highest appliance is above 4 metres
What is the maximum distance from the invert to floor level for ventilation to be required in a stub stack?
1.0 metres
1.2 metres
1.3 metres
1.5 metres
How can ventilation be acquired for a stub stack?
Through a water pump
Via an air admittance valve
Using a pressure regulator
By installing a filter
What is the maximum distance a stub stack can be installed away from the main vented stack (branch drain)?
4 metres
5 metres
6 metres
7 metres
Where must the vented stack always be installed?
At the lowest part of the run
At the middle of the run
At the head or highest part of the run
Anywhere along the run
What is the maximum height for the highest connection in a stub stack system?
1.0 metres
1.5 metres
2.0 metres
2.5 metres
What is the maximum distance from invert to ground floor in a stub stack system?
1.0 metres
1.3 metres
1.5 metres
2.0 metres
What is the function of the air admittance valve in a stub stack?
To allow water into the stub stack
To allow air into the stub stack
To release air from the stub stack
To prevent water from entering the stub stack
What does the air admittance valve help to avoid?
Water overflow
Trap seal loss
Air leakage
Pipe blockage
What happens when the appliance is discharging?
It releases water into the stub stack
It releases air from the stub stack
It sucks air into the stub stack
It stabilizes water pressure
What is a stub stack normally capped off with?
A water seal
A pressure valve
An access cap
A discharge pipe
What is the minimum height above an opening window that a soil stack should be installed if it terminates outside the property and is within 3 metres of the window?
600mm
700mm
800mm
900mm
What is the purpose of installing a terminal fitting on the top of the soil stack?
To prevent debris from falling down the stack and causing a blockage
To increase the water flow rate
To reduce noise from the stack
To improve the aesthetic appearance of the stack
What additional component may need to be fitted if the installation is in a windy area?
A vent cowl
A water filter
A noise reducer
A decorative cap
What is used to correctly weather a vent pipe that protrudes through a roof line?
Lead or weathering slate
Plastic sheeting
Rubber gasket
Metal flashing
What is the purpose of using a weather collar on a vent pipe?
To stop rainwater penetrating the property
To enhance the appearance of the roof
To provide insulation
To support the vent pipe
What is grey water recovery?
A type of recycling that reuses water from washbasins, showers, washing machines, and baths.
A method of collecting rainwater for irrigation purposes.
A process of purifying drinking water from rivers.
A technique for desalinating seawater.
Where is the grey water stored in a grey water recovery system?
In an overhead tank.
In an underground tank.
In a rainwater barrel.
In a septic tank.
What is the purpose of the high level cistern in a grey water recovery system?
To store drinking water.
To filter the grey water.
To pump the grey water to flush WCs within the property.
To heat the grey water for household use.
