Waste Water Engineering Mcqs


Q.  Pick up the correct statement from the following?

a. In treated sewage, 4 ppm of D.O. is essential
b. Only very fresh sewage contains some dissolved oxygen
c. The solubility of oxygen in sewage is 95% that is in distilled water
d. All the above


ANSWER: See Answer
 
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MCQs:  In very first stage of decomposition of the organic matter in sewage________________?
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MCQs:  The self-cleansing velocity of water flowing through pipe lines, is___________________ ?
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MCQs:  The first stage of neutral process of sludge digestion, is__________________?
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MCQs:  The formula V = (1/n) r2/3____________________?
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MCQs:  The maximum diameter of sewers adopted in the designs is_______________?
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MCQs:  Facultative bacteria survive in_____________________?
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MCQs:  The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is____________________?
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MCQs:  The underground sewers are more subjected to________________?
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MCQs:  Ventilating shafts are provided to a sewer line at every__________________?
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MCQs:  Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is__________________?
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MCQs:  For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed________________?
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MCQs:  If the pH value of sewage is 7__________________?
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MCQs:  The normal values of over flow rates for secondary sedimentation tanks, ranges between__________________?
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MCQs:  The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is __________________?
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MCQs:  For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is____________________?
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MCQs:  The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.25 m, is____________________?
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MCQs:  Large diameter sewers subjected to external pressure alone, are reinforced ______________________?
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MCQs:  The liquid wastes from kitchens, bath rooms and wash basins, is not called________________?
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MCQs:  The detention time (t) of a settling tank, may be defined as the time required for_________________?
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MCQs:  The effluent of a septic tank is_________________?
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