Access and Inspection Chambers Quiz

What is the main difference between an access chamber and an inspection chamber?

• Access chambers are designed for work at drain level.

• Inspection chambers are always made of plastic.

• Inspection chambers allow a person to enter.

• Access chambers are for surface water only.

According to G13/AS2, what is the minimum grade for the slope on the floor towards the channel when constructing a wet access chamber?

• 1:2.5

• 1:3

• 1:1.5

• 1:2

What is the purpose of a flexible joint on an access chamber installation?

• To seal between pre-cast concrete risers when constructing an access chamber.

• To allow for expansion and contraction of the drainage pipework caused by temperature fluctuations.

• To protect the drain from damage caused by ground movement or settling.

• To provide easy adjustment of fittings to obtain the correct gradient.

What is the minimum diameter of an access chamber lid for infrastructure works?

• 700mm

• 600mm

• 500mm

• 450mm

What is the main reason for the different design between inspection and access chambers?

• The type of material used.

• The depth of the drain.

• The type of water being drained.

• The location of the chamber.

What is the minimum internal diameter of an access chamber according to NZS 4404:2010?

• 1100mm

• 800mm

• 900mm

• 1000mm

What is the purpose of haunching/benching in a wet chamber?

• To ensure sewage and cleaning water drain back into the channel.

• To prevent gas accumulation.

• To provide ventilation.

• To support the chamber lid.

What is the required minimum depth of an access chamber?

• 500mm

• 750mm

• 1000mm

• 1250mm

What is the purpose of a corbel on an access chamber installation?

• To provide ventilation of an access chamber.

• To provide a stable base and prevent movement of the chamber.

• To seal the lid on an access chamber.

• To achieve the required height of an access chamber.

What is the minimum diameter of a cast lid into an access chamber for domestic installations?

• 700mm

• 600mm

• 500mm

• 450mm