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271.

For the sewers of diameter more than 600 mm, the type of joint preferred is

A.	spigot and socket joint	B.	collar joint
C.	bandage joint	D.	mechanical joint

272.

Manholes are, generally, located

A.	at all changes of direction	B.	at all changes of gradient
C.	at all junctions of main and branch sewers	D.	all of these

273.

For large sewers, the maximum distance between manholes should be

A.	75 m	B.	150 m
C.	200 m	D.	300 m

274.

The lower portion of a manhole is is known as

A.	access shaft	B.	base
C.	working chamber	D.	cover

275.

The minimum diameter of a manhole cover should be

A.	25 m	B.	50 cm
C.	75 cm	D.	100 cm

276.

Manholes on sewer lines are provided for

A.	periodic cleaning	B.	providing air for oxidation
C.	removal of part of sewerage	D.	all of these

277.

A drop manhole is provided if

A.	a sewer drops from a height	B.	a branch sewer discharges into the main sewer at a higher level
C.	both (a) and (b)	D.	none of these

278.

The equipment used for checking the levels of the sewer inverts is

A.	dumpy level	B.	theodolite
C.	boning rod	D.	all of these

279.

For building drainage pipes, a smoke test is applied.

Correct

Incorrect

280.

Water test is conducted for house plumbings.

Yes