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Worksheets6035DRPPT1Q2
Total questions: 32
Worksheet time: 2hrs 36mins
What is the purpose of a primary ventilated stack in a soil system?
To reduce the pressure in the system
To aid the flow of effluent
To increase the temperature of the system
To filter the effluent
What must be avoided to prevent trap seal loss and effluent crossflowing up the opposite connection in a primary ventilated stack system?
The installation of additional branch connections
The prevention of crossflow from one connection to another
The use of larger diameter pipes
Regular maintenance of the stack system
If an existing branch connection to a stack is between 82-160mm, such as a WC, how should another connection be installed opposite to it to avoid crossflow?
At the same vertical level
200mm lower
No less than 200mm upwards
At any distance as long as it is opposite
What is the maximum branch diameter allowed for a small branch connection in a primary ventilated stack system?
160mm
82mm
200mm
250mm
For the prevention of crossflow in a primary ventilated stack system, what is the minimum distance required between the center line of opposed branches?
82mm
160mm
200mm
250mm
What is the purpose of using a parallel junction in a primary ventilated stack system?
To increase the flow rate of the waste pipe
To overcome crossflow and allow for a connection under the 200mm restriction
To reduce the amount of waste pipe needed
To connect multiple waste pipes into a single stack
Where can a soil stack be located in a property?
Only on an external wall
Only within the property
Either on an external wall or within the property
Only in the loft area
How is the stack normally enclosed internally?
With transparent covers
In some duct work
With insulation material
It is not enclosed
What does the internal enclosure of the stack allow it to do?
To be visible from outside
To reach the loft area and either terminate or protrude out of the roof line
To connect to the property's water supply
To function without any connections or branches
What is the purpose of an intumescent collar in a primary ventilated stack system?
To increase airflow within the building
To restrict flames and smoke from travelling from one area to another
To support the structural integrity of the building
To provide insulation against outside temperatures
In which type of building is an intumescent collar a requirement for the soil stack if it is internal?
Detached houses
Flats or maisonettes
Commercial office buildings
Single-story retail spaces
What should always be used when cutting any plastic material according to the learning material?
A fine-toothed saw
A hole saw
A hacksaw
A jigsaw
What is the purpose of using a hole saw when connecting to a strapped boss for a parallel junction?
To create a threaded connection
To weld the plastic material
To enable the connection
To measure the diameter of the pipe
What is this?
Manifold
Collared boss
Elephant's foot
Strap on boss
What is attached to the arbour of a hole saw?
A measuring tape
A pilot drill
A screwdriver
A blade
Which of the following is NOT a way to make additional branch connections to a soil stack?
Strap boss
Boss branch
Collared boss
Soil pipe
What is the purpose of strap bosses in a primary ventilated stack system?
To decrease the pressure in the waste pipe
To allow a waste pipe to connect directly to the soil stack
To filter the waste passing through the soil stack
To increase the flow rate of the waste pipe
What must be maintained to ensure the correct functioning of the strap bosses in a primary ventilated stack system?
A 90-degree gradient
A 2½-degree gradient
A 45-degree gradient
A 5-degree gradient
How is the boss adaptor inserted to create the watertight seal in a primary ventilated stack system?
It is welded into place
It is screwed into place
Solvent weld
It is push fit
What is the role of boss branches in a primary ventilated stack system?
They prevent backflow in the system.
They form an integral part of the main soil stack and allow a limited number of connections.
They are used to increase water pressure within the stack.
They are decorative elements that enhance the appearance of the stack.
How can connections be made to the boss branches in a primary ventilated stack?
By using adhesive tape
By threading the pipes together
By solvent welding or push fit
By soldering the connections
What is the purpose of inserting collared bosses into the main soil stack in a primary ventilated stack system?
To decrease the diameter of the main stack
To allow multiple connections to be made
To prevent the use of the system internally
To ensure that only one connection can be made
What does the use of collared bosses in a primary ventilated stack system prevent?
Water flow
Crossflow
Ventilation
Soil erosion
Where are primary ventilated stack systems with collared bosses commonly used?
In kitchens
In outdoor settings
In bathroom suites
In living rooms
What is this?
Elephant's foot
Manifold
collared boss
110mm strap on
What should always be allowed for in each discharge branch and also in the main soil stack in a primary ventilated stack system?
Access roding and clearance
Water seal
Air admittance valve
Overflow relief mechanism
What is this
Access branch with boss
Access Coupling
Pan connector
A pipe with multiple branches
What is this?
Pan connector
A T-shaped pipe with an additional side opening
110mm access bend
A pipe with multiple branches
What is this
A straight pipe with a closed end
A T-shaped pipe with an additional side opening
A curved pipe section
Access connector with bosses
Where should access be provided in a primary ventilated stack system?
Below the spillover level of the lowest appliance
At the spillover level of the highest appliance
Above the spillover level of the highest appliance
Outside the building where the system is installed
When might a primary ventilated stack require additional ventilations?
When the system is rarely used
When the system is over a certain age
When the size of the system or the number of appliances discharging requires it
When the system is used only for small appliances
What is installed if a primary ventilated stack needs additional ventilations?
A primary non-ventilated stack
A secondary ventilated stack or a ventilated branch system
A tertiary loop system
A simple extension to the existing stack
