Environmental Engineering (3160611) MCQs

MCQs of Water Supply scheme/System Components

Showing 21 to 28 out of 28 Questions
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21.

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

(a)

2 m
(b)

2.25 m
(c)

2.75 m
(d)

3 m
Answer:

Option (d)

22.

Capacity of soil to absorb moisture, is generally known as

(a)

permeability
(b)

porosity
(c)

infiltration capacity
(d)

perviousness.
Answer:

Option (c)

23.

At break point of chlorination,

(a)

chlorine is used to oxidise
(b)

residual chloride is zero
(c)

residual chloride is maximum
(d)

residual chlorine reappears.
Answer:

Option (d)

24.

The factor for the selection of pumping station site, is

(a)

distance of the source of contamination or pollution
(b)

height above the H.F.L. of the river
(c)

future expansion
(d)

All of above
Answer:

Option (d)

25.

Low turbidity of water is detected by

(a)

Turbidity tube
(b)

Jackson turbidity meter
(c)

Baylis turbidimeter
(d)

Hellipe turbidimeter
Answer:

Option (c)

26.

Pick up the incorrect statement from the following :

(a)

The pH value of water indicates the logarithm of reciprocal of hydrogen ion concentration in water
(b)

Higher value of pH means lower hydrogen ion concentration
(c)

Lower value of pH means higher hydrogen ion contraction
(d)

Lower value of pH gives alkaline solution
Answer:

Option (d)

27.

Pick up the correct statement from the following :

(a)

The volume of underground water extracted by gravity drainage from a saturated soil, is known as yield
(b)

The ratio of volume drained to the total volume of material drained, is known as specific yield
(c)

The volume of water retained by the soil against the pull of gravity, is called specific retention or field capacity
(d)

All the above.
Answer:

Option (d)

28.

The normal value of over flow rates for plain primary sedimentation tanks, ranges between

(a)

25, 000 to 35, 000 litres/sqm/day
(b)

40, 000 to 50, 000 litres/sqm/day
(c)

50, 000 to 60, 000 litres/sqm/day
(d)

80, 000 to 100, 000 litres/sqm/day
Answer:

Option (b)

Showing 21 to 28 out of 28 Questions
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