Environmental Engineering Sheet 5
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1) Question.
The controlling design parameter in the design of all settling tanks is:
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2) Question.
The sound pressure level for a jet plane on the ground with sould pressure of bar should be
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3) Question.
A circular sewer of diameter 1 m carries storm water to a depth of 0.75 m. The hydraulic radius is approximately
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4) Question.
The trap for a water closet is called
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5) Question.
The purpose of a proportional weir at the effluent end of a channel type grit removal unit is to
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6) Question.
For a colony of 10,000 persons having sewage flow rate of 200 litres/capita/day, BOD of applied sewage of 300 mg/litre and organic loading of 300 kg/day/hectare, the area of an oxidation pond required for treating the sewage of the cololy is
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7) Question.
Consider the following statements:
Ventilation of sewer lines is necessary to
1. avoid building up of sewer gases
2. ensure atmospheric pressure in the waste water surface.
3. ensure the safety of sewer maintenance people
4. provide oxidation facility to sewage.
Which of these statements are correct?
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8) Question.
The correct sequence of processes in a water t reatment plant for rural water apply is
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9) Question.
Service connection consists of
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10) Question.
A commonly used handpump is the
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11) Question.
The finely divided dispersion of solid particles which are not visible to the naked eye and cannot be removed by ordinary filters are known as -
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12) Question.
The presence of calcium and magnesium chloride in water causes -
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13) Question.
Colloidal impurities if associated with organic matter having bacterias becomes the chief source of -
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14) Question.
The presence of bacteria in water causes -
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15) Question.
Dissolved impurties consist of -
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16) Question.
Suspended impurities consist of -
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17) Question.
The arithmetical increase method of forecasting population gives ........ as compared to geometrical increase method.
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18) Question.
For large cities, the suitable method for forecasting population is -
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19) Question.
The water mains should be designed for ......... of the average daily water requirement.
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20) Question.
The design period for a water supply project is taken as -
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