Environmental Engineering Sheet 3
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1) Question.
The detention period and overflow rate respectively for plan sedimentation with coagulation are generally
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2) Question.
For a given discharge, the efficiency of sedimentation tank can be increased by
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3) Question.
The settling velocity of a particle in a sedimentation tank increases if
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4) Question.
The settling velocity of a particle ina sedimentation tank depends on
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5) Question.
Percentage of bacterial load that can be removed from water by the process of plan sedimentation is about
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6) Question.
The overflow rate for plan sedimentaion tanks is about
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7) Question.
The length of rectangular sedimentation than should not be more than
where B is the width of the tank
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8) Question.
The velocity of flow of water in a sedimentation tank is about
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9) Question.
The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of
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10) Question.
The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about
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11) Question.
The yield of a surface stream may be obtained by -
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12) Question.
The growth of population may be conveniently represented by -
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13) Question.
The formula, F= R-K(1.8 T+32), for obtaining the annual run-off is known as -
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14) Question.
According to Vermule's formula, the annual run-off(F) in cm is given by -
[Where, R= Annual rainfall in cm, T= Mean annual temperature in °C, and K= A constant]
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15) Question.
Run-off is the water which flows -
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16) Question.
The water of a river has an important property called -
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17) Question.
The open wells or dug wells -
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18) Question.
The most important source of water for public water supply is -
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19) Question.
The open wells or dug wells are also known as -
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20) Question.
The portion of soil through which lateral movement of water takes place is called -
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