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Environmental Engineering

Environmental Engineering
Average rate of water consumption per head per day as per Indian Standard is

135 liters
165 liters
100 liters
200 liters

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Environmental Engineering
Air binding phenomena in rapid sand filters occur due to

Excessive negative head
Low temperature
Mud ball formation
Higher turbidity in the effluent

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Environmental Engineering
Disinfection efficiency is

Unaffected by pH value of water
Highest at pH value equal to 7
Increased at higher pH value of water
Reduced at higher pH value of water

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Environmental Engineering
The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about

1.0 to 5.0 ppm
0.05 to 0.5 ppm
0.01 to 0.05 ppm
0.5 to 1.0 ppm

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Environmental Engineering
The self cleansing velocity for all sewers in India is usually

3.0 m/sec to 3.5 m/sec
1.5 m/sec to 2.0 m/sec
Less than 1.0 m/sec
1.0 m/sec to 1.2 m/sec

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Environmental Engineering
The percentage of chlorine in fresh bleaching powder is about

10 to 15
40 to 50
30 to 35
20 to 25

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MORE MCQ ON Environmental Engineering

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