Test: Water Demand


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15 Questions MCQ Test Environmental Engineering | Test: Water Demand

Test: Water Demand for Civil Engineering (CE) 2023 is part of Environmental Engineering preparation. The Test: Water Demand questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Water Demand MCQs are made for Civil Engineering (CE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Water Demand below.
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Test: Water Demand - Question 1

The average quantity of water (in lpcd) required for domestic purposes according to IS code is ________

Detailed Solution for Test: Water Demand - Question 1

Explanation: The average domestic water demand in India is 135 litres per capita per day. For developed countries, average domestic water demand is around 340 lpcd because they live a luxurious life.

Test: Water Demand - Question 2

 The average consumption of water required in factories in lpcd is ___________

Detailed Solution for Test: Water Demand - Question 2

Explanation: The average water consumption in factories is 30lpcd when no bathrooms are required and 45lpcd when bathrooms are required.

Test: Water Demand - Question 3

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

Detailed Solution for Test: Water Demand - Question 3

Explanation: The minimum average water consumption takes place in fire demand. It accounts to 1lpcd which is very less but this water is required in very less duration.

Test: Water Demand - Question 4

What is the minimum water pressure available at fire hydrants?

Detailed Solution for Test: Water Demand - Question 4

Explanation: The minimum water presure available at fire hydrants is 100-150kN/m² i.e 10-15m of water head and it should be maintained for 4 to 5 hours.

Test: Water Demand - Question 5

Match list 1(calculation of fire demand) with list 2 (formulae) and select the correct answer using the codes given below.

where Q = quantity of water, P = population in thousands

Detailed Solution for Test: Water Demand - Question 5

Explanation: Kuchling’s formula is used when the population of the city exceeds 50,000.
When the population of the city is less than 2 lakh, the above formula for central congested high value city is used.

Test: Water Demand - Question 6

 What is the fire demand of the city of 1lakh population by Buston’s formula?

Detailed Solution for Test: Water Demand - Question 6

Explanation: By Buston’s formula , Q = 5663√P where P in thousands. Here, P =100, Q = 5663√100 => Q = 56630.

Test: Water Demand - Question 7

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

Detailed Solution for Test: Water Demand - Question 7

Explanation: Water loss in thefts and wastes contributes to 15% of total consumption, which includes the water loss due to leakage or stolen due to illegal connection.

Test: Water Demand - Question 8

Which is the correct statement regarding per capita demand?

Detailed Solution for Test: Water Demand - Question 8

Explanation: The per capita demand is the annual average amount of daily water required by one person. It is denoted by q in litres per day per person.

Test: Water Demand - Question 9

What are the factors affecting per capita demand?

Detailed Solution for Test: Water Demand - Question 9

Explanation: Increase in cost of water, quality of water and size of the city will result in more consumption of water. Poor habits of people in the utilization of water will also cause greater consumption.

Test: Water Demand - Question 10

Which of the following statement is correct?

Detailed Solution for Test: Water Demand - Question 10

Explanation: Rich class consumes more water, loss of water is more if the pressure in distribution system is more, water consumption is more in flush system and b option is the only correct statement.

Test: Water Demand - Question 11

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

Detailed Solution for Test: Water Demand - Question 11

Explanation: Maximum hourly demand = 2.7 * annual average hourly demand
=2.7 * 10000
=27000m3.

Test: Water Demand - Question 12

 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?

Detailed Solution for Test: Water Demand - Question 12

Explanation: Maximum daily draft +fire draft = 25 + 35 = 60MLD
Maximum hourly draft = 40MLD
Coincident draft is maximum of maximum draft draft + fire draft and maximum hourly draft =60MLD.

Test: Water Demand - Question 13

What is the design period for the water treatment unit?

Detailed Solution for Test: Water Demand - Question 13

Explanation: Water treatment unit is designed for 15 years and its design discharge is a maximum daily demand.

Test: Water Demand - Question 14

 What is the design discharge for intake structures?

Detailed Solution for Test: Water Demand - Question 14

Explanation: Intake structures and the pipe mains that carry water from intake structures to treatment plant are designed for maximum daily demand.

Test: Water Demand - Question 15

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

Detailed Solution for Test: Water Demand - Question 15

Explanation: Distribution system is designed for 30 years, the demand reservoir for 50 years, the water treatment unit for 15 years and the pipe mains for 30 years.
A B C D
a) 1 2 3 4
b) 2 3 4 1
c) 2 1 4 3
d) 1 2 4 3

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