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Environmental Engineering

Environmental Engineering
The chemical most commonly used to increase speed of sedimentation of sewage is

Copper sulphate
Sulphuric acid
Lime
Sodium permanganate

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Environmental Engineering
The type of valve, which is provided on the suction pipe in a tube-well, is

Pressure relief valve
Air relief valve
Reflux valve
Sluice valve

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Environmental Engineering
The main disadvantage of cement concrete sewers is

Less strength
Less life
Difficulty in transportation due to heavy weight
Difficulty in construction

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Environmental Engineering
The slope of sewer shall be

Steeper than 1 in 20
Zero
Given in the direction opposite to natural slope of ground
Given in the direction of natural slope of ground

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Environmental Engineering
The commonly used material for water supply pipes, which has the properties of being strong, not easily corroded and long life but is heavy and brittle, is

Reinforced cement concrete
Copper
Cast iron
Steel

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Environmental Engineering
Sewerage system is designed for

Minimum flow only
Maximum flow only
Average flow only
Maximum and minimum flow

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MORE MCQ ON Environmental Engineering

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