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Environmental Engineering

Environmental Engineering
Septic tank is a (i) Settling tank (ii) Digestion tank (iii) Aeration tank

Only (iii)
Only (i)
(i) and (iii)
(i) and (ii)

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Environmental Engineering
Alkalinity in water is expressed as milligrams per litre in terms of equivalent

Magnesium carbonate
Calcium carbonate
Sodium carbonate
Calcium hydroxide

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Environmental Engineering
The type of sewer which is suitable for both combined and separate system is

Semi-elliptical sewer
Horseshoe type sewer
Egg shaped sewer
Circular sewer

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Environmental Engineering
The disinfection efficiency of chlorine increases by (i) Decreasing the time of contact (ii) Decreasing the temperature of water (iii) Increasing the temperature of water

Only (iii)
Both (i) and (ii)
Both (i) and (iii)
Only (i)

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Environmental Engineering
The suitable system of sanitation for area of distributed rainfall throughout the year with less intensity is

Combined system
Partially separate system
Separate system
Partially combined system

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Environmental Engineering
Which of the following unit works in anaerobic conditions?

Trickling filters
Sludge digestion tank
Sedimentation tank
Activated sludge treatment

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