# WATER SUPPLY Engineering Interview Questions

Posted On:February 1, 2019, Posted By: Latest Interview Questions, Views: 11722, Rating :

## Best WATER SUPPLY Engineering Interview Questions and Answers

Dear Readers, Welcome to WATER SUPPLY Engineering Interview Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of WATER SUPPLY Engineering. These WATER SUPPLY Engineering Questions are very important for campus placement test and job interviews. As per my experience good interviewers hardly plan to ask any particular questions during your Job interview and these model questions are asked in the online technical test and interview of many IT & Non IT Industries.

### 1. 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

A. 1880 kilo litres

B. 2880 kilo litres

C. 3880 kilo litres

D. 4880 kilo litres.

Ans: B

### 2. The fire demand of a city may be worked out by

A. Kuichling’s formula

B. Freeman formula

C. Under Writers formula

D. Bustan’s formula

E. All the above.

Ans: E

A. odour

B. colour

C. bacterias

D. hardness

E. turbidity.

Ans: A

A. 10 times

B. 15 times

C. 20 times

D. 30 times

E. 35 times.

Ans: D

A. odour

B. bacterias

C. turbidity

D. colour.

Ans: B

### 6. Sunlight

A. helps growth of bacterias

B. impedes growth of algae

C. increases dissolved oxygen content

D. reduces turbidity.

Ans: B

A. 2 m

B. 2.25 m

C. 2.50 m

D. 2.75 m

E. 3.00 m.

Ans: E

A. 7 years

B. 14 years

C. 21 years

D. 28 years

E. 35 years.

Ans: E

### 9. Time of concentration

A. is the time taken, for precipitation

B. duration of rainfall.

C. time taken for all the ran off to reach the drain

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

Ans: D

### 10. Surge tanks are used

A. for storage water

B. to increase the velocity in a pipeline

C. as overflow valves

D. to guard against water hammer.

Ans: D

A. 50 litres

B. 65 litres

C. 85 litres

D. 105 litres

E. 135 litres.

Ans: E

A. 60 mg/litre

B. 75 mg/litre

C. 100 gm/litre

D. 150 mg/litre.

Ans: A

A. nil

B. 5

C. 10

D. 15

E. 20

Ans: A

### 14. Acidity in water is caused due to

A. Mineral acids

B. Free CO2

C. Iron sulphate

D. Aluminium sulphate

E. All the above.

Ans: E

### 15. In distribution pipes, drain valves are provided at

A. lower point

B. higher point

C. junction points

D. any where.

Ans: A

### 16. Corrosion of well pipes may not be reduced by

A. reducing the draw down and the pumping rate

B. reducing the flow velocity

C. using thicker pipes

D. using screens having larger area of openings

E. none of these.

Ans: D

### 17. Asbestos pipes are

A. light in weight and easy to transport

B. highly resistant to corrosion

C. high flexible to accommodate deflection upto 12°

D. very much smooth and hydraulically efficient

E. all the above.

Ans: E

A. 2 m

B. 3 m

C. 4 m

D. 5 m

E. 6 m.

Ans: E

### 19. By boiling water, hardness can be removed if it is due to

A. calcium sulphate

B. magnesium sulphate

C. calcium nitrate

D. calcium bicarbonate

E. none of these.

Ans: D

### 20. For determining the velocity of flow of underground water, the most commonly used non-empirical formula is

A. Darcy’s formula

B. Slichter’s formula

C. Hazen’s formula

D. Lacy’s formula.

Ans: A

A. 7.2 mm

B. 7.9 mm

C. 8.6 mm

D. 10 mm.

Ans: C

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

A. Boarding schools

B. Nurses home and medical quarters

C. hostels

D. all the above.

Ans: D

A. 1500 m

B. 1505 m

C. 1475 m

D. 1485 m.

Ans: D

### 24. The factor affecting per capita demand, is

A. size of the city

B. climatic conditions

C. pressure in water mains

D. cost of water

E. all the above.

Ans: E

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

A. wells

B. springs

C. infiltration wells

D. storage reservoirs

E. none of these.

Ans: D

### 26. The specific retention is least in case of

A. Clay

B. Sand

C. Silt

D. Coarse gravel.

Ans: D