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73.

A vertical pipe attached to a drain line that 078೪0.
through it.

s through the roof with no water running

(^) Air pipe (B) Vent pipe
(೮) Antisiphone pipe (D) Waste pipe
The size of a branch ventilating pipe on a soil pipe should be not less than
(A) 32mm (B) 50mm
(C) 75mm (D) 100 mm

The main function of this pipe is to prevent water seal from being distroyed.

(A)
(0)

Vent cowl
Suction pipe

The asbestos cement sewers are

൯) Antisiphone pipe

(2) Air pipe

(A) Not structurally strong to bear large compressive screw
(B) Susceptible to corrosion by sulphuric acid

(C) Light in weight

(D) All of the above

When the bedding of sewer pipe, the centre line of sewers and their grades are transferred

from the ground by means of
(A)
(0)

Ranging rod (
Sight rail and boning rod

It is a water tight chamber constructed in any buil
from gully traps/soil pipes and disposes off

(A)
(0)

Inspection chamber (
Septic tank

0)

0)

3) Dumpy level
Theodolite

ding drainage system which takes wastes

B) Drop man hole
Soak pit

In the pipe line, which joint is commonly used in pumping station

(A)
(0)

Screwed joint (
Expansion joint

What is/are the materials used in screwed joints to
(A)
(0)

Rubber ring and collar (
Solvent cement

(D)

(D)

B) Flanged joint
Flexible joint

make it water tight?
B) Hemp yarn and zinc paint
Nut and bolt

In the water supply pipeline, the expansion joint may be provided with

(A)
(0)

Rubber Collar (
Insulated rubber sheet

11

(D)

B) Fibber ring

Elastic rubber gasket

094/2022
[7.7.0.]