Environment Engineering MCQ

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BPS ENVIRONMENT Engineering Important question

Question-:8 The colour In water Is generally 
Due to
Answer-: Dissolved Impurities

Question-:9 The DO level In natural Unpolluted
Water of normal temperature is found to be
Answer-: 10 mg/l

Question-:10 If the total Hardness Of water is
Greater than it's Alkalinity ,The carbonate 
Hardness will equal to
Answer-: Total Alkalinity

Question-:11 On Standard silica ,The turbidity
 should Be Limited to
Answer-: 10 PPM

Question-:12 Disinfection of water result in
Answers-: Killing of pathogenic bacteria

Question-:13 The proportion of solid In sewage 
Is about 
Answer-: (.1%) Less

Question-:14 CoD/ BoD Ratio Of fresh water is
Answer-: More than 1

Question-:15 The max Depth Of sedimentation
Tank
Answer-: 6m

Question-: 16  The bacteria Which may be survive 
With or without Free oxygen
Answer-: Facultative Bacteria

Question-:17 The best sewer material to, Resist
Hydrogen Sulphate Corrosion is
Answer-: Brick Masonry

Question-:18 The indicator used in Cod test is
Answer-: Ferroin

Question-:19 The permissible pH value for public
Water Supplies may Range b/w
Answer-: 6.5 to 8.5

Question-:20 The colour of fresh sewage is
Answers-: Grey ( SSC, IEs)
Question-: 22 The yield of rapid sand filter Is 30
time to that of slow sand filterfilterfilterfilter
Answer-: Right

Question-:23 Hydraulically For dry weather flow
The Best sewer section
Answer-: Oval shaped shaStmethod
d

Question-: 24 Strainer type Tubewells are Considered
Unsuitable for
Answer-: Fine grained Stratra

Question-: 25 Wich Method is accurate for
Forecasting population for sound & Rapidly
Increasing City 
Answer-: Geometrical Increase method
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