B. Branch sewer

C. House sewer

D. Lateral sewer

A. Pneumatic ejector

B. None of these

C. Reciprocating pump

B. Hydrogen sulphide (H2S)

C. Carbon dioxide (CO2)

D. Methane (CH4)

A. Heart disorder

C. Bronchitis

D. Lung cancer

A. Domestic sewage

B. Industrial sewage

D. Inclusive of domestic and industrial sewage but excludes storm water

A. Adding potassium permanganate

B. Phenol-di-sulphuric acid

D. Adding sulphuric acid

A. The clear space between the baffle top and covering slab is about 7.5 cm

B. The baffles or tees are extended up to top level of scum

D. Free board of 0.3 m may be provided

A. 1.5

B. 3

D. 2.5

A. Six hours

C. Two to three hours

D. One hour

A. Kutters formula

B. Bazins formula

D. Chezys formula

A. 10

B. 2

D. 5

A. The larger the sewer in size, no deposition will take place

B. The smaller the sewer in size, less will be velocity

C. The larger the sewer in size, more will be velocity

A. Cast iron sewers

B. Stone ware sewers

C. Cement concrete sewers

A. Cast iron sewer

C. Brick sewer

D. R.C.C. sewer

A. 24 to 36 hours

B. 8 to 16 hours

C. 16 to 24 hours

A. Circular

B. Rectangular

C. Horse shoe shaped

A. Degradation

B. Cleaner water

C. Recovery

A. Steel pipes

B. Steel shell coated from inside with cement mortar

C. Steel shell coated from outside with cement mortar

A. 1.25 D

C. 1.75 D

D. D

A. 100 cm

B. 150 cm

D. 110 cm

A. Vs = 218 (Gs Gw)d [(3T + 70)/100]

C. Vs = 218 (Gs Gw)d [(3T + 70)/100]

D. Vs = 418 (Gs Gw) d [(3T + 70)/100]

A. 2.25

C. 2.5

D. 2.55

A. Two sewer lines intersect

C. Ordinary manhole cannot be built

D. Sewer line runs along a main road

A. Water test

C. Mirror test

D. Ball test

A. 1500 to 2000

B. 1000 to 1500

D. 100 to 500

B. Catch basins are generally provided in sewers for carrying drainage discharge

C. Manholes are provided in sewer pipes at suitable intervals

D. None of these

A. With beds of rocks and gravels

B. Lined with stones

D. Neither A. nor B.

A. Main sewer

B. Intercepting sewer

D. Lateral sewer

A. Glazed stone wares

B. Asbestos cement

C. R.C.C.

A. 25 cm

C. 12.5 cm

D. 10 cm

A. Turbidity

C. Colour

D. Odour

A. Velocity at dry weather flow

B. Velocity of water at flushing

C. Velocity of water in a pressure filter

B. 70 to 75%

C. 65 to 70%

D. 85%

A. None of these

B. Suspended solids

D. Dissolved solids

A. Sewers are designed for minimum permissible velocity at minimum flow

B. Maximum daily flow = average daily flow

D. Maximum daily flow = 2 times the average daily flow

B. 1.76 m

C. 0.68 m

D. 0.88 m

B. 0.9 cm

C. 1.5 m

D. 1.2 m

A. D /2

B. D/3

D. D

A. 12 days

C. 7 days

D. 2 days

A. 413.5 cm/sec

B. 500 cm/sec

D. 213.5 cm/sec

A. D3/2 = 4 b3/2

C. D3/8 = 4 b3/8

D. D2/3 = 4 b2/3

A. None of these

B. In sewer treatment plants

C. At sewer pipes

A. Mechanically

C. Hydraulically

D. Electrically

A. Solubility of gases in sewage

B. Viscosity of sewage

C. Biological activity of bacteria in sewage

A. A particle to travel from top surface to bottom sludge zone

B. A particle to travel along its length

C. None of these

B. 4.5 to 5.5 m/sec

C. 3.0 to 4.0 m/sec

D. 3.5 to 4.5 m/sec

A. None of these

B. 225 ppm

D. 200 ppm

A. 50%

B. 60%

D. 45%

A. 2.30 m

B. 2.40 m

D. 2.50 m

A. Main sewer

B. House sewer

D. Branch sewer