ENVIRONMENTAL ENGINEERING QUIZ

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

180000 m³

150000 m³

100000 m³

270000 m³

TRUE ANSWER : ?
YOUR ANSWER : ?

As compared to rapid sand filters, slow sand filters give (i) Slower filtration rate (ii) Higher filtration rate (iii) Lesser efficiency in removal of bacteria (iv) Higher efficiency in removal of bacteria The correct answer is

(ii) and (iii)

(i) and (ii)

(i) and (iv)

(ii) and (iv)

TRUE ANSWER : ?
YOUR ANSWER : ?

The hourly variation factor is usually taken as

2.0

2.7

1.5

1.8

TRUE ANSWER : ?
YOUR ANSWER : ?

The suitable layout of a distribution system for irregularly growing town is

Dead end system

Grid iron system

Ring system

Radial system

TRUE ANSWER : ?
YOUR ANSWER : ?

The main disadvantage of oxidation pond is that

Large area is required for construction

BOD removal is very low

None of these

Maintenance and operation cost are high

TRUE ANSWER : ?
YOUR ANSWER : ?

Chlorine demand of water is equal to

Applied chlorine

Residual chlorine

Sum of applied and residual chlorine

Difference of applied and residual chlorine

TRUE ANSWER : ?
YOUR ANSWER : ?

The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is

Infinite

Zero

1

100

TRUE ANSWER : ?
YOUR ANSWER : ?

The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by

COD > BOD > TOD

TOD > BOD > COD

BOD > COD > TOD

TOD > COD > BOD

TRUE ANSWER : ?
YOUR ANSWER : ?

In chlorination, with the rise in temperature of water, death rate of bacteria

None of these

Increases

Remains unaffected

Decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following causes a decrease in per capita consumption?

Use of metering system

Hotter climate

Good quality of water

Better standard of living of the people

TRUE ANSWER : ?
YOUR ANSWER : ?

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