ENVIRONMENTAL ENGINEERING QUIZ

Most suitable section of sewer in separate sewage system is

Rectangular section

Standard form of egg shaped sewer

Modified egg shaped section

Circular section

TRUE ANSWER : ?
YOUR ANSWER : ?

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

1000

4,00,000

4000

1,00,000

TRUE ANSWER : ?
YOUR ANSWER : ?

Period of cleaning of slow sand filters is about

24 - 48 hours

1 - 2 year

2 - 3 months

10 - 12 days

TRUE ANSWER : ?
YOUR ANSWER : ?

The ratio of 5 day BOD to ultimate BOD is about

1

43894

43864

43833

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YOUR ANSWER : ?

The biochemical treatment of sewage effluents is essentially a process of

Reduction

Oxidation

Dehydration

Alkalinization

TRUE ANSWER : ?
YOUR ANSWER : ?

The characteristics of fresh and septic sewage respectively are

Both alkaline

Acidic and alkaline

Both acidic

Alkaline and acidic

TRUE ANSWER : ?
YOUR ANSWER : ?

Air binding phenomena in rapid sand filters occur due to

Low temperature

Mud ball formation

Higher turbidity in the effluent

Excessive negative head

TRUE ANSWER : ?
YOUR ANSWER : ?

Facultative bacteria are able to work in

Absence of oxygen only

Presence as well as in absence of oxygen

Presence of water

Presence of oxygen only

TRUE ANSWER : ?
YOUR ANSWER : ?

If the average daily consumption of a city is 100,000 m³, the maximum daily consumption on peak hourly demand will be

150000 m³

100000 m³

180000 m³

270000 m³

TRUE ANSWER : ?
YOUR ANSWER : ?

Sewage treatment units are designed for

Maximum and minimum flow

Maximum flow only

Average flow only

Minimum flow only

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