6035DRPPT1Q2

What should be positioned just above ground level at the base of a soil stack?

• a) Ventilation grill

• b) Pressure gauge

• c) Roding access

• d) Trap seal

What is vertical distance of pipes to prevent crossflow?

• 200mm

• 150mm

• 250mm

• 300mm

What is the consequence of crossflow in a primary ventilated stack?

• a) Increased trap seal

• b) Reduced effluent flow

• c) Trap seal loss and effluent crossflow

• d) Improved ventilation

What feature does a parallel junction include to facilitate maintenance?

• a) Roding access

• b) Trap seal

• c) Ventilation grill

• d) Pressure gauge

What is the minimum pipe size recommended if multiple appliances are connected to a single discharge pipe in a primary ventilated stack?

• a) 25mm

• b) 32mm

• c) 40mm

• d) 50mm

What is the purpose of the self-cleaning velocity in a primary ventilated stack?

• a) To increase blockage risk

• b) To reduce blockage risk

• c) To slow down the flow of liquid

• d) To reduce the velocity of solids

What is installed at the base of a soil stack to maintain effluent velocity during directional changes?

• a) Long radius bend

• b) 90-degree bend

• c) Short radius bend

• d) Coupling

What is the minimum recommended pipe size for a parallel junction?

• a) 25mm

• b) 32mm

• c) 40mm

• d) 50mm

At what distance from the drain invert level is the lowest connection to the soil stack on a building from three to five storeys?

• a) 450mm

• b) 550mm

• c) 650mm

• d) 750mm

What is the purpose of a long radius bend at the base of a soil stack?

• a) To increase pressure fluctuations

• b) To decrease effluent velocity

• c) To maintain effluent velocity

• d) To reduce blockage risk