PPT 8,9,10 DRAINAGE QUIZ

What stack system is shown in the image?

• Primary ventilated branch,

• Secondary discharge system

• Secondary branch system

• Discharge branch

What stack system is shown in the image?

• Secondary ventilated branch

• Primary discharge system

• Discharge ventilated system

• Primary ventilated system

What stack system is shown in the image?

• Ventilated discharge system

• Secondary discharge system

• Primary branch system

• Primary ventilated system

What is the function of the vent pipe in a standard domestic stack?

• To take all the effluent away from the building

• To allow air to enter the system at atmospheric pressure

• To increase water pressure in the system

• To prevent water from entering the dwelling

If an installation exceeds the maximum length stated, what should be done?

• Use a smaller pipe size

• Use the same pipe size

• Use the next pipe size diameter up

• Remove the installation

Which appliance has a waste size of 32 mm?

• WC

• Basin or bidet

• Bath

• Sink

What is the maximum length for a waste pipe used for a WC according to the table?

• 3.0 m

• 6.0 m

• 1.7 m

• 4.0 m

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

• To increase the pressure of the effluent

• To maintain the velocity of the effluent

• To decrease the velocity of the effluent

• To prevent effluent from entering the stack

What is the minimum distance from the drain invert level for the lowest connection to the soil stack in low-rise buildings?

• 450mm

• 500mm

• 600mm

• 750mm

For buildings up to five storeys, what is the minimum distance from the drain invert level for the lowest connection to the soil stack?

• 450mm

• 500mm

• 750mm

• 900mm