Ventilation and Discharge Stack Quiz

What is the minimum diameter for branch ventilating pipes serving one appliance?

• 15mm

• 25mm

• 32mm

• 50mm

According to the document, what should be the minimum diameter for stacks serving urinals?

• 50mm

• 65mm

• 75mm

• 100mm

What is the purpose of ventilating discharge stacks?

• To increase water flow

• To prevent water seals from being lost

• To reduce pipe diameter

• To enhance air circulation

What is the minimum height above any opening into the building for branch ventilating pipes running directly to outside air?

• 500mm

• 750mm

• 900mm

• 1000mm

What should be the minimum diameter for ventilating pipes connected to discharge stacks liable to surcharging?

• 50 mm
• 150 mm
• 100 mm
• 25 mm

What is the maximum capacity in litres/sec for a discharge stack with a diameter of 100mm?

• 3.4

• 5.3

• 7.2

• 9.0

What should be avoided in the 'wet' portion of a discharge stack?

• Offsets

• Ventilation

• Rodding points

• Branch connections

What is the minimum diameter for branch pipes longer than 15m or with more than 5 bends?

• 25mm

• 32mm

• 50mm

• 75mm

What is the minimum centre line radius for the bend at the foot of a stack?

• 100mm

• 150mm

• 200mm

• 250mm

What is the minimum centre line distance for a stub stack from the invert of the connection or drain?

• 1.0m

• 1.3m

• 2.0m

• 2.5m