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Environmental Engineering

Environmental Engineering
Orthotolidine test is used for determination of

Dissolved oxygen
Residual chlorine
Biochemical oxygen demand
Dose of coagulant

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Environmental Engineering
Settling velocity increases with

Depth of tank
Size of particles
Specific gravity of solid particles
Temperature of liquid

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Environmental Engineering
As compared to shallow wells, deep wells have

Less depth
More discharge
Less discharge
More depth

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Environmental Engineering
Sewage treatment units are designed for

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

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Environmental Engineering
The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by

COD > BOD > TOD
TOD > BOD > COD
BOD > COD > TOD
TOD > COD > BOD

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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
Partially combined system
Separate system

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