Environmental Engineering Sheet 27
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1) Question.
Which of the following determinations are not necessary for raw water from a lake for use as source of supply of water for boiler-feed?
1. Turbidity
2. Bacterial count
3. Iron
4. Hardness
Select the correct answer using the codes given below.
Codes:
Answer. -
2) Question.
What is the correct sequence of formation of the following compounds during chlorination of water in which ammonia is present?
1.
2.
3.
Select the correct answer using the codes given below.
Codes:
Answer. -
3) Question.
Which of the follwing treatments reduce salinity of water?
1. Flash mixing and sedimentation
2. Electrodialysis
3. Reverse osmosis
4. Freezing
5. Filtration
Sleect the correct answer using the codes given below.
Codes:
Answer. -
4) Question.
The atmosphere extends upto a height of 10,000 km. It is divided into the following four thermal layers:
1. Mesosphere
2. Stratosphere
3. Thermospher
4. Troposphere
The correct sequence of these layers starting from the surface of the earth upwards is
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5) Question.
If Biochemical oxygen demand (BOD) of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then pupulation equivalent of town is
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6) Question.
Select the correct statement
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7) Question.
The effect of increasing diamter of sewer on the self cleansing velocity is
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8) Question.
Scour valves are provided
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9) Question.
The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is
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10) Question.
The type of valve which is provided to control the flow of water in the distribution system at street comers and where the pipe lines intersect is
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11) Question.
The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is
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12) Question.
The treatment of water with bleaching power is known as
Answer.
