Enviromental engineering objective questions for competitive exams part 1

1. What is disinfection ?

A)Removal of microorganism in water
B)Removal of water
C)Removal of dust
D)Removal of sand

... Answer is A
The removal of microorganism from the water is known as disinfection.
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A)adding chlorine to increase taste
B)adding chlorine to change color
C)adding chlorine to water to kill bacteria
D)All of the above mentioned

... Answer is C
The process of adding chlorine to water for killing certain bacteria and other microbes.
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A)Process of removing taste from water
B)Process of removing hardness from water
C)Either 1 and 2
D)None of the above mentioned

... Answer is B
The process of removing hardness from the water is known as water sofetning.
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A)complete removal of microorganisms from water
B)complete removal of oil from water
C)complete removal of soil from water
D)All of the above mentioned

... Answer is A
The process of complete removal of microorganisms and the water doesnot contain any impurities.
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A)Summation of head loss must be zero
B)Inflow should be equal to out flow
C)Both A & B
D)None of the above

... Answer is c

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A)Free from microorganisms
B)Taste, odor should not be there
C)Free from unwanted materials
D)All of the above

... Answer is D
Not provided.
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A)Passage of water through granular media
B)Passage through oven
C)Passage through Mixer
D)None of the above mentioned

... Answer is A

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A)Waste formed in the house
B)liquid waste generated in house
C)Precipitation of suspended particle in fluid
D)None of the above mentioned

... Answer is C

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A)250 mg/l & 1000 mg/l
B)300 mg/l & 1200 mg/l
C)500 mg/l & 600 mg/l
D)1000 mg/l & 10000 mg/l

... Answer is A
BIS standard for chlorination acceptable limit is 250 mg/l and 1000 mg/l.
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A)to plot inflow or outflow vs time
B)to plot rain vs time
C)to plot soil vs water
D)All of the above mentioned

... Answer is A

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