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Nhbrc Questions 026 to 030

HomeNhbrc Questions 026 to 030

NHBRC QUESTIONS 26 - 30

26)

Concrete anchor block shall be provided if the drain pipes

a)

Are encased in concrete

b)

Are made of cast iron

c)

Are of UPVC plastic

d)

Have a gradient exceeding 1 in 10

.

27)

What should the minimum soil cover be when precast or cast in situ concrete is placed over above the drain

a)

50mm

b)

100mm

c)

150mm

d)

300mm

.

28)

Where a water pipe is to be laid underground horizontally next to a sewer or other services, it should be at least …. away from the drain?

a)

3 Meters

b)

5 Meters

c)

10 meters

d)

15 Meters

.

29)

What is the minimum distance between drain pipes laid underground horizontally/parallel to pipe conveying water intended for general household use?

a)

No limit

b)

500mm

c)

600mm

d)

1500mm

.

30)

What should the minimum clearance be when a drinking water pipe crosses a sewer line?

a)300mm
b)500mm
c)600mm
d)1000mm

.

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