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Environmental Engineering

Environmental Engineering
If Biochemical oxygen demand (BOD) of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is

1,00,000
1000
4000
4,00,000

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Environmental Engineering
The treatment of water with bleaching powder is known as

De-chlorination
Pre-chlorination
Hypo-chlorination
Super chlorination

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Environmental Engineering
The length of rectangular sedimentation tank should not be more than (Where ‘B’ is the width of the tank)

2B
4B
B
8B

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Environmental Engineering
The rate of BOD exerted at any time is

Inversely proportional to BOD remaining
Directly proportional to BOD satisfied
Inversely proportional to BOD satisfied
Directly proportional to BOD remaining

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Environmental Engineering
The detention period in coagulation tanks is usually kept as

1 to 2 minutes
2 to 6 hours
2 to 6 days
30 to 45 minutes

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Environmental Engineering
A pipe conveying sewage from plumbing system of a single building to common sewer or point of immediate disposal is called

Sub-main sewer
Main sewer
Lateral sewer
House sewer

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MORE MCQ ON Environmental Engineering

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