Waste Water Engineering Mcqs


Q.  The gas evolved in sewers is________________?

a. Carbondioxide
b. Hydrogen sulphide
c. Methane
d. All of these


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  The coagulant widely used for sewage treatment, is_________________?
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MCQs:  For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed________________?
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MCQs:  In SI units the power of sound is represented in __________________?
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MCQs:  The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is______________?
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MCQs:  For providing an Indian type W.C., the R.C.C. slabs in the toilet portion__________________?
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MCQs:  Flocculated particles do not change their___________________?
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MCQs:  When drainage to sewage ratio is 20, the peak dry weather flow is_______________?
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MCQs:  The non-clog pump which permits solid matter to pass out with the liquid sewage, is________________?
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MCQs:  Which one of the following tests is used for testing sewer pipes ?
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MCQs:  The sewage is pumped up_______________?
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MCQs:  If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is___________________?
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MCQs:  The sewer pipe which carries sewage from a building for immediate disposal is______________?
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MCQs:  Clogging of sewers, is caused due to_______________?
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MCQs:  In sewage having fully oxidised organic matter, the nitrogen exists in the form of________________?
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MCQs:  Dry water flow in a combined sewer, is______________________?
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MCQs:  Assertion A.: The minimum self cleansing velocity in the sewer, at least once a day, must be generated. Reason (R): If certain deposition takes place and is not removed, it obstructs free flow and causes further deposition leading to complete blocking of the sewer?
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MCQs:  3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is______________________?
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MCQs:  If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by_________________?
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MCQs:  The sewage treatment in septic tanks is due to__________________?
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MCQs:  In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is____________________?
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