ALLIGATION OR MIXTURE PROBLEMS QUIZ

The yield of a rapid gravity filter as compared to that of slow sand filter, is

30 times

10 times

15 times

20 times

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum depth of sedimentation tanks is limited to

5 m

6 m

4 m

3 m

TRUE ANSWER : ?
YOUR ANSWER : ?

Mathamoglobinemia or blue baby disease is caused due to

Nitrites

Sulphides

Nitrates

Chlorides

TRUE ANSWER : ?
YOUR ANSWER : ?

If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is

4880 kilo litres

3880 kilo litres

1880 kilo litres

2880 kilo litres

TRUE ANSWER : ?
YOUR ANSWER : ?

The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is

2 m

2.25 m

3.00 m

2.50 m

TRUE ANSWER : ?
YOUR ANSWER : ?

Asbestos pipes are

very much smooth and hydraulically efficient

light in weight and easy to transport

All listed here

highly resistant to corrosion

TRUE ANSWER : ?
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The process of passing water through beds of granular materials, is called

Filtration

None of these

Screening

Sedimentation

TRUE ANSWER : ?
YOUR ANSWER : ?

The factor affecting per capita demand, is

size of the city

climatic conditions

cost of water

All listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

While determining the yield of open wells by the pumping test

Maximum safe yield of an open well, is expected at critical depression head

Depression head resulting at critical velocity, is called critical depression head

Working head is generally limited to ?rd of the critical depression head

Velocity of recharging water, increases with depression head

TRUE ANSWER : ?
YOUR ANSWER : ?

In pressure supply mains, water hammer pressure is reduced by providing

None of these

Sluice valves

Pressure relief valves

Air valves

TRUE ANSWER : ?
YOUR ANSWER : ?