Drainage general quizz

what are 2x functions of a gully trap ?

• overflow relief for sewer system

• For venting of sewer system.

• access into the sewer drain.

• receive discharge from wastewater fixtures

What is the chamber in the picture?

• Stormwater manhole.

• Inspection chamber

• Sewer access chamber.

• pump chamber

what would you use at a stormwater outfall to prevent scouring.

• grates

• gravel

• gabion baskets

• baffles

• Rip,Rap

what are the 2xcodes used for foul water drainage.

• G12,water

• AS/NZ3200

• G13

• AS/NZ3500.2.2018

• G14 trade waste.

What is the code that applies to stormwater drainage.

• G12

• AS/NZ3500.2.2018.

• G13

• E1 Surface Water.

According to G13 what height must a gully dish be set above unpaved ground?

• 200mm

• 50mm

• 150mm

• 100mm

According to E1 must a catch pit have on the outlet end?

• no bends, straight pipe

• 90-degree bend to make a full syphon.

• 2x 45 degree bends to make a syphon

• inverted y junction, with 45 degree bend with access cap inside catchpit.

What is the minimum level a gulley dish should be set below a floor level.

• 50mm

• 200mm

• 100mm

• 150mm

According to E1 surface water, what is the minimum grade of a surface S/W drain?

• 1:100

• 1:60

• 1:80

• 1:120

According to AS/NZ3500.2.2018 what is the minimum grade for a 100mm pipe.

• 1:80

• 1:40

• 1:60

• 1:120