Question 1

Which method is used to measure the color of water?

Accepted Answer

A)  gravimetric analysis
B)  chromatography
C)  tintometer method
D)  hydrometer analysis C

Question 2

Which of the following statement is correct?

Accepted Answer

A)  rich class consumes less water
B)  intermittent water supplies leads to less water consumption
C)  loss of water is more if the pressure in the distribution system is less
D)  water consumption is less in flush system B

Question 3

If the annual average hourly demand of the city is 10000m3, what is the maximum hourly consumption?

Accepted Answer

A)  2700 m3
B)  27000 m3
C)  270000 m3
D)  2700000 m3 A

Question 4

The maximum permissible limit for suspended solids is________

Accepted Answer

A)  10 mg/l
B)  20 mg/l
C)  30 mg/l
D)  40 mg/l

Question 5

What is the full form of NTU in context with turbidity?

Accepted Answer

A)  number of transfer unit
B)  neurological turbidity unit
C)  nephelometric turbidity unit
D)  network terminal unit

Question 6

One JTU is equivalent to turbidity produced by________

Accepted Answer

A)  1mg of fine silica dissolved in 1l of distilled water
B)  1g of fine silica dissolved in 1l of distilled water
C)  1g of fine silica dissolved in 1ml of distilled water
D)  1mg of fine silica dissolved in 1ml of distilled water

Question 7

Suspended solids are measured by which of the following?

Accepted Answer

A)  turbidity rod
B)  gravimetric test
C)  chromatography
D)  jackson's turbidity meter

Question 8

What is the design discharge for intake structures?

Accepted Answer

A)  maximum daily demand
B)  maximum hourly demand
C)  maximum weekly demand
D)  average daily demand

Question 9

1 TCU (True Color Unit) is equivalent to

Accepted Answer

A)  the color produced by 1 g of platinum cobalt
B)  the color produced by 1 mg of platinum cobalt
C)  the color produced by 1 mg of platinum cobalt in 1l of distilled water
D)  the color produced by 1 mg of platinum cobalt in 1ml of distilled water

Question 10

Water lost in theft and waste contributes to how much % of total consumption?

Accepted Answer

A)  5
B)  10
C)  15
D)  20

Question 11

The average consumption of water required in factories in lpcd is________

Accepted Answer

A)  10-15
B)  20-30
C)  30-45
D)  70-80

Question 12

In which type of water demand, minimum average consumption of water takes place?

Accepted Answer

A)  domestic water demand
B)  industrial water demand
C)  institutional and commercial water demand
D)  fire demand

Question 13

The permissible limit of turbidity of domestic water is________ppm.

Accepted Answer

A)  5-10
B)  1-5
C)  10-50
D)  10-30

Question 14

Threshold odour number testing is preferred in hot water.

Accepted Answer

A) True 
 B)False

Question 15

Identify the correct relation between the following?

Accepted Answer

A)  dissolved solid = total solid + suspended solid
B)  dissolved solid = total solid - suspended solid
C)  total solid = dissolved solid / suspended solid
D)  dissolved solid = suspended solid - total solid

Question 16

When depth of insertion of turbidity rod increases, the reading in the turbidity rod________

Accepted Answer

A)  decreases
B)  increases
C)  first decrease, then increase
D)  remains constant

Question 17

What is the design period for the water treatment unit?

Accepted Answer

A)  10 years
B)  15 years
C)  20 years
D)  30 years

Question 18

What are the factors affecting per capita demand?

Accepted Answer

A)  size of city
B)  size of city, habit of people
C)  cost of water, quality of water, size of city
D)  cost of water, quality of water, size of city, habit of people

Question 19

If in a city, the maximum daily draft is 25MLD, fire draft is 35MLD and maximum hourly draft is 40MLD, what is the coincident draft?

Accepted Answer

A)  60mld
B)  40mld
C)  25mld
D)  35mld

Question 20

In which of the following units, design period is maximized?

Accepted Answer

A)  distribution system
B)  demand reservoir
C)  water treatment unit
D)  pipe mains

Exam 1: Water Quality and Demand Measurements