Question 61 : The diameter of the vertical type pressure filter is
1. 2-2.5 m
2. 1 m
3. 5 m
4. 10m
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Question 62 : State whether the following statement is true or false.
The up flow filter is used in domestic water supply.
1. True
2. False
3.
4.
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Question 63 : When the Reynolds number is greater than 1.9 but less than 500, the coefficient of drag CD is
1. CD = 24/R
2. CD = R/24
3. CD = 18.5/R^0.6
4. CD = R^0.6/18.5
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Question 64 : The rate of filtration of pressure filtration is ______ l/m²/hour.
1. 1000-5000
2. 5000-10000
3. 6000-8000
4. 6000-15000
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Question 65 : The slow sand filter is designed for
1. Maximum daily demand
2. Maximum yearly demand
3. Average daily demand
4. Maximum weekly demand
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Question 66 : In which of the following filters, the rate of filtration is highest?
1. Slow sand filter
2. Rapid sand filter
3. Pressure filter
4. Roughing filter
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Question 67 : The cracking of bed is more prominent
1. Near the wall junction
2. Outside the wall junction
3. Inside the wall junction
4. On the wall junction
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Question 68 : The minimum number of filter beds in the slow sand filter is
1. 1
2. 2
3. 3
4. 3
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Question 69 : The filtration rate of a slow sand filter is _____ litres of water per square metre.
1. 20
2. 30
3. 50
4. 100
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Question 70 : Carmen-Kozney equation has been derived using which of the following equation?
1. Cole brook white equation
2. Bernoulli equation
3. Darcy Weisbach equation
4. Swamee jain equation
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