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Environmental Engineering MCQ Quiz Practice Test-1
 
Environmental-Engineering

Which of the following values of pH represents a stronger acid?
2
5
7
10
The distribution mains are designed for
Maximum daily demand
Maximum hourly demand
Average daily demand
Maximum hourly demand on maximum day
Sewage treatment units are designed for
Maximum flow only
Minimum flow only
Average flow only
Maximum and minimum flow
For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as
4.5 to 6.0
6.5 to 8.0
8.5 to 10.0
10.5 to 12.0
The pathogens can be killed by
Nitrification
Chlorination
Oxidation
None of the above
Orthotolidine test is used for determination of
Dissolved oxygen
Residual chlorine
Biochemical oxygen demand
Dose of coagulant
Period of cleaning of slow sand filters is about
24 - 48 hours
10 - 12 days
2 - 3 months
1 - 2 year
The rate of filtration in slow sand filters in million litres per day per hectare is about
50 to 60
100 to 150
500 to 600
1400 to 1500
The working conditions in imhoff tanks are
Aerobic only
Anaerobic only
Aerobic in lower compartment and anaerobic in upper compartment
Anaerobic in lower compartment and aerobic in upper compartment
The self cleansing velocity for all sewers in India is usually
Less than 1.0 m/sec
1.0 m/sec to 1.2 m/sec
1.5 m/sec to 2.0 m/sec
3.0 m/sec to 3.5 m/sec
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