Environmental Engineering Sheet 18
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1) Question.
In lime-soda process
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2) Question.
Disinfection efficiency is
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3) Question.
As compared to higher pH values, the contact period required for efficnent chlorination at lower pH values is
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4) Question.
In chlorination, with the rise in temperature of water, death rate of bacteria
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5) Question.
Which of the following chemical compounds can be used for dechlorination of water?
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6) Question.
The suitable method for disinfection of swimming pool water is
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7) Question.
The percentage of chlorine in fresh bleaching powder is about
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8) Question.
The process in which the chlorination is done beyond the break point is known as
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9) Question.
Chlorine demand of water is equal to
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10) Question.
The disinfection efficiency of chlorine increases by
i) decreasing the time of contact
ii) decreasing the temperature of water
iii) increasing the temperature of water
The correct answer is
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11) Question.
The capacity of the pumps is normally expressed as -
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12) Question.
In order to prevent water to flow back in opposite direction, we shall use a -
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13) Question.
In order to control the flow of water through pipes, a ......... is provided.
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14) Question.
The pipe joint commonly used in pumping stations is -
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15) Question.
The plain ends of cast iron pipes are joined by -
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16) Question.
The type of joint to be used in pipes depends upon the -
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17) Question.
The corrosion in pipe is due to -
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18) Question.
A valve which allows the water to flow in one direction but prevents its flow in the reverse direction, is known as -
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19) Question.
A pressure relief valve is provided to prevent -
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20) Question.
The valve provided on the suction pipe in a tube well is -
Answer.
