The amount of coagulant needed for coagulation of water increases with (i) Increase in turbidity of water (ii) Decrease in turbidity of water (iii) Increase in temperature of water (iv) Decrease in temperature of water The correct answer is

Environmental Engineering
The amount of coagulant needed for coagulation of water increases with (i) Increase in turbidity of water (ii) Decrease in turbidity of water (iii) Increase in temperature of water (iv) Decrease in temperature of water The correct answer is

(ii) and (iv)

(ii) and (iii)

(i) and (ii)

(i)and(iv)

(ii) and (iv)

(ii) and (iii)

(i) and (ii)

(i)and(iv)

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Environmental Engineering
Chlorine demand of water is equal to

Applied chlorine

Difference of applied and residual chlorine

Residual chlorine

Sum of applied and residual chlorine

Applied chlorine

Difference of applied and residual chlorine

Residual chlorine

Sum of applied and residual chlorine

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Environmental Engineering
In facultative stabilization pond, the sewage is treated by

Aerobic bacteria only

Dual action of aerobic bacteria and anaerobic bacteria

Sedimentation

Algae only

Aerobic bacteria only

Dual action of aerobic bacteria and anaerobic bacteria

Sedimentation

Algae only

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Environmental Engineering
The settling velocity of a particle in a sedimentation tank depends on

Both depth and surface area of tank

Depth of tank

None of these

Surface area of tank

Both depth and surface area of tank

Depth of tank

None of these

Surface area of tank

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Environmental Engineering
The settling velocity of a particle in a sedimentation tank increases if

None of these

The surface area of tank is increased

Particle size is decreased

The depth of tank is decreased

None of these

The surface area of tank is increased

Particle size is decreased

The depth of tank is decreased

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Environmental Engineering
The polluted water is one which

Is contaminated

Consists of undesirable substances rendering it unfit for drinking and domestic use

Contains pathogenic bacteria

Is safe and suitable for drinking and domestic use

Is contaminated

Consists of undesirable substances rendering it unfit for drinking and domestic use

Contains pathogenic bacteria

Is safe and suitable for drinking and domestic use

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Environmental Engineering

Environmental Engineering The amount of coagulant needed for coagulation of water increases with (i) Increase in turbidity of water (ii) Decrease in turbidity of water (iii) Increase in temperature of water (iv) Decrease in temperature of water The correct answer is

Environmental Engineering Chlorine demand of water is equal to

Environmental Engineering In facultative stabilization pond, the sewage is treated by

Environmental Engineering The settling velocity of a particle in a sedimentation tank depends on

Environmental Engineering The settling velocity of a particle in a sedimentation tank increases if

Environmental Engineering The polluted water is one which

Environmental Engineering
The amount of coagulant needed for coagulation of water increases with (i) Increase in turbidity of water (ii) Decrease in turbidity of water (iii) Increase in temperature of water (iv) Decrease in temperature of water The correct answer is

Environmental Engineering
Chlorine demand of water is equal to

Environmental Engineering
In facultative stabilization pond, the sewage is treated by

Environmental Engineering
The settling velocity of a particle in a sedimentation tank depends on

Environmental Engineering
The settling velocity of a particle in a sedimentation tank increases if

Environmental Engineering
The polluted water is one which