Environmental Engineering Sheet 6
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1) Question.
If the methyl orange alkalinity of water equals or exceeds total hardness, all of the hardness is
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2) Question.
Water present in an artesian aquifer is usually.
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3) Question.
Aerosol is
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4) Question.
The following zones are formed in a polluted river:
1. zone of clear water
2. zone of active decomposition
3. zone of recovery
4. zone of pollution
The correct sequence in which these zones occur progressively downstream in a polluted river is
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5) Question.
Which one of the following is least important in the activated sludge process?
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6) Question.
Which one of the folloiwng sewage treatment units has a parshall flume?
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7) Question.
The two main gases liberated from an anaerobic sludge digestion tank would include
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8) Question.
Which one of the folloiwng pairs is not correctly matched?
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9) Question.
The flow sheet of the kiquid stream of a sewage treatment scheme consists of
1. trickling filter
2. primary settling tank
3. grit chamber
4. screen chamber
5. secondary settling tank
The correct sequence of these units in the sewage treatment scheme of a liquid stream is
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10) Question.
In the oxidation ditch, the excess sludge is taken to
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11) Question.
The odour of water can be determined by -
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12) Question.
The colour of water is expressed in numbers of a -
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13) Question.
Turbidity of water is expressed in terms of -
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14) Question.
The presence of hydrogen sulphide in water causes -
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15) Question.
When lead is present in water, it -
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16) Question.
The presence of .......... causes red colour in water.
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17) Question.
The sodium carbonate in water -
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18) Question.
The presence of sodium chloride in water -
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19) Question.
Suspended impurities include -
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20) Question.
The turbidity in water is caused due to -
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