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Environmental Engineering

Environmental Engineering
For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as

6.5 to 8.0
8.5 to 10.0
10.5 to 12.0
4.5 to 6.0

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Environmental Engineering
The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is

Reflux valve
Air relief valve
Sluice valve
Pressure relief valve

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Environmental Engineering
Disinfection of water results in

Removal of hardness
Complete sterilisation
Killing of disease bacteria
Removal of turbidity

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Environmental Engineering
Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about

59
75
100
50

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Environmental Engineering
A sewer that receives the discharge of a number of house sewers is called

House sewer
Sub-main sewer
Intercepting sewer
Lateral sewer

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Environmental Engineering
The maximum discharge of a tube well is about

50 liters/sec
1000 liters/sec
5 liters/sec
500 liters/sec

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MORE MCQ ON Environmental Engineering

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