11 JULY 2021 CURRENT AFFAIRS QUIZ

Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be

5

10

nil

15

TRUE ANSWER : ?
YOUR ANSWER : ?

The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level

1500 m

1475 m

1505 m

1485 m

TRUE ANSWER : ?
YOUR ANSWER : ?

Time of concentration

time taken for all the ran off to reach the drain

time taken for the storm water to travel from the most remote point to the drain.

duration of rainfall.

is the time taken, for precipitation

TRUE ANSWER : ?
YOUR ANSWER : ?

The fire demand of a city may be worked out by

Bustan’s formula

Freeman formula

Kuichling’s formula

All listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

Surge tanks are used

for storage water

as overflow valves

to guard against water hammer

to increase the velocity in a pipeline

TRUE ANSWER : ?
YOUR ANSWER : ?

Mathamoglobinemia or blue baby disease is caused due to

Sulphides

Chlorides

Nitrites

Nitrates

TRUE ANSWER : ?
YOUR ANSWER : ?

Turbidity of raw water is a measure of

O.D

None of these

Acidity of water

Suspended solids

TRUE ANSWER : ?
YOUR ANSWER : ?

Pick up the incorrect statement from the following. The underground sources of water, is from

storage reservoirs

infiltration wells

springs

wells

TRUE ANSWER : ?
YOUR ANSWER : ?

Asbestos pipes are

light in weight and easy to transport

All listed here

highly resistant to corrosion

very much smooth and hydraulically efficient

TRUE ANSWER : ?
YOUR ANSWER : ?

According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for

All listed here

Nurses home and medical quarters

Boarding schools

hostels

TRUE ANSWER : ?
YOUR ANSWER : ?

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