Drop manholes at the junctions of sewer lines, are provided if_________.

Civil Engineering : Waste Water Engineering - Quiz(MCQ)

two sewer lines intersect

sewer line runs along a main road

ordinary manhole cannot be built

invert level of a branch sewer is more than 60 cm that of the main sewer

Correct Answer : invert level of a branch sewer is more than 60 cm that of the main sewer

Recently Updated in Waste Water Engineering Questions

What is the growth of huge amounts of algae and other aquatic plants leading to the deterioration of the water quality called?

Algae growth

Eutrophication

Denitrification

Nitrification

Correct Answer : Option (B) : Eutrophication

Explanation : Eutrophication is the growth of huge amounts of algae and other aquatic plants leading to the deterioration of water quality. The untreated wastewater is rich in organic matter which demands oxygen.

5 days-biochemical oxygen demand (BODâ‚…) is taken at a temperature of

0°C

15°C

20°C

25°C

Correct Answer : Option (C) : 20°C

Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for

unexpected increase in the population

under estimates of maximum and average flows

unexpected large scale infiltration of stream water

All of the above

Correct Answer : Option (D) : All of the above

Civil Engineering MCQ's

Building Materials

Building Construction

Strength of Materials

Hydraulics

RCC Structures Design

Steel Structure Design