Environmental Engineering Sheet 7
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1) Question.
The maximum flow occurs in an eggshaped sewer when the ratio of depth of flow to vertical diameter is
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2) Question.
Which one of the following is the purpose of providing a surge tank in a pipeline carring water?
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3) Question.
The effective size (ES) of sand and its uniformity coefficient (UC) are the usually specified paraments for sand filters. In slow sand filters, as compared to repid sand filters.
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4) Question.
The various treatment processes in a water treatment plant are listed below:
1. filtration
2. chlorination
3. sedimentation
4. coagulation
5. flocculation
The correct sequence of these processes in water treatment is
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5) Question.
In a water treatment plant, dissolved iron and manganese can be removed from the water by
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6) Question.
Storage of water by impounding is requierd where
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7) Question.
Two identical centrifugal pumps are operated in parallel so as to deliver into a common delivery pipe. Speed for both is also identical. At what total discharge (Q) and total head (H) will be system operate as compared to discharge and head to each of the pumps operated singly?
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8) Question.
Two sources generate noise levels of 90 dB respectively. The cummulative effect of these two noise levels on the human ear is
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9) Question.
Which of the following materials are used as landfill sealants for the control of gas and leachate movements?
1. Lime
2. Sand
3. Bentonite
4. Fly ash
5. Butyl rubber
Select the correct answer using the codes given below.
Codes:
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10) Question.
Which of the following pairs is/are correctly matched?
1. Eutrophication ---- Nutrient accumulation leading to ecosystem change occuring in impounded water
2. Autotophism ---- Utilization, rearrangement and decompositon of complex materials predominate
3. Heterotrophism --- Predominace of fixation of light energy, use of simple inorganic substaces and built-up
complex substance
Select the correct answer using the codes given below.
Codes:
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11) Question.
pH value is a symbol for ........ concentration.
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12) Question.
The maximum permissible chloride content in water for domestic supplies should not exceed -
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13) Question.
The maximum permissible total solid content in water for domestic purposes should not exceed -
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14) Question.
Low turbidity of water can be determined by -
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15) Question.
High turbidity of water can be determined by -
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16) Question.
Odours and tastes may result due to the presence of -
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17) Question.
The maximum permissible colour for domestic supplies, on platinum cobalt scale is -
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18) Question.
The maximum permissible temperature for domestic supply is -
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19) Question.
The commercial osmoscope is graduated with pO values from -
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20) Question.
When the pO value of water is 5, then it has -
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