Question 11 : What is the expression used for population forecasting by the arithmetical increase method?
1. PO (1 + R/100)ⁿ
2. PO + n*x
3. PO + n*x + ( n(n+1)/2 )*y
4. PO – n*x
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Question 12 : Which of the following statement is correct?
1. Rich class consumes less water
2. Intermittent water supplies leads to less water consumption
3. Loss of water is more if the pressure in the distribution system is less
4. Water consumption is less in flush system
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Question 13 : What is the expression used for population forecasting by the incremental increase method?
1. PO (1 + R/100)ⁿ
2. PO + n*x
3. PO + n*x + (n (n+1) /2 ) *y
4. PO – n*x
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Question 14 : What is the fire demand of the city of 1lakh population by Buston's formula?
1. 5663
2. 56630
3. 566300
4. 5663000
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Question 15 : In which method of population forecast, percentage increase in population from decade to decade is assumed constant?
1. Arithmetical increase method
2. Geometrical increase method
3. Incremental increase method
4. Decreased rate of growth method
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Question 16 : Water lost in theft and waste contributes to how much % of total consumption?
1. 5
2. 10
3. 15
4. 20
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Question 17 : Consider the following statements
1. The arithmetical increase method is suitable for new cities
2. The decreasing growth rate method is used where the rate of growth shows a downward pattern
3. The geometrical increase method is used for older cities
Which of the following above statements is/are correct?
1. 1,2,3
2. 1 and 3
3. Only 2
4. 2 and 3
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Question 18 : 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?
1. 60MLD
2. 40MLD
3. 25MLD
4. 35MLD
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Question 19 : If the annual average hourly demand of the city is 10000m3, what is the maximum hourly consumption?
1. 2700 m3
2. 27000 m3
3. 270000 m
4. 2700000 m3
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Question 20 : What is the minimum water pressure available at fire hydrants?
1. 80-100kN/m²
2. 100-150kN/m²
3. 40-60kN/m²
4. 150-200kN/m²
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