Waste Water Engineering MCQ Questions & Answers

1

Sewer pipes need be checked for

A) Minimum flow B) Maximum flow C) Both A and B D) None of these

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Answer & Solution

Answer: Option C

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2

In the activated sludge process

A) Aeration is continued till stability B) Aeration is done with an admixture of previously aerated sludge C) Sludge is activated by constant stirring D) Water is removed by centrifugal action

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Answer & Solution

Answer: Option B

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3

With self cleansing velocity in sewers

A) Silting occurs at bottom B) Scouring occurs at bottom C) Both silting and scouring occur at bottom D) Neither silting nor scouring occurs at bottom

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Answer & Solution

Answer: Option D

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4

In areas where rainy season is limited to a few months, the type of sewerage system recommended is

A) Combined system B) Partially separate system C) Separate system D) None of these

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Answer & Solution

Answer: Option C

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5

For trunk and out-fall, the type of sewers generally used, is

A) Standard egg shaped B) Circular shaped C) Horse shoe shaped D) Parabolic shaped

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Answer & Solution

Answer: Option C

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6

The spacing of bars of perforations of fine screens used for the treatment of sewage, is

A) 2 to 3 mm B) 3 to 5 mm C) 5 to 8 mm D) 8 to 10 mm

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Answer & Solution

Answer: Option A

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7

The spacing of bars for perforations in coarse screens used for the treatment of sewage, is

A) 20 mm B) 30 mm C) 40 mm D) 50 mm

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Answer & Solution

Answer: Option D

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8

Before discharging the foul sewage into rivers, it is generally treated by

A) Screening B) Sedimentation C) Oxidation D) All the above

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Answer & Solution

Answer: Option D

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9

The following is the physical characteristic of sewage

A) Turbidity B) Colour C) Odour D) All the above

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Answer & Solution

Answer: Option D

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10

If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains

A) Hydrogen sulphide B) Carbon dioxide C) Methane D) Oxygen

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Answer & Solution

Answer: Option C

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Waste Water Engineering MCQ Questions & Answers | Civil Engineering