Waste Water Engineering Mcqs

Q.  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______________________?

a. 100 mg/l
b. 200 mg/l
c. 300 mg/l
d. 400 mg/l


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  The suitable cross-section of sewers to carry combined flow, is__________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  In sewers the highest non-scouring velocity is achieved in________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of__________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  For trunk and out-fall, the type of sewers generally used, is_____________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
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Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  The stone ware sewers_________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  A manhole is classified as shallow if its depth is between_________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  In case of sewer lines_________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is_____________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  A circular sewer section is preferred to because__________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is_________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  The asbestos cement pipes are generally laid___________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  The water carried sewerage system removes__________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  The flow velocity in detritus tanks is________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,______________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  The rate of accumulation of sludge per person per year, is_______________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  The spacing of bars of perforations of fine screens used for the treatment of sewage, is_______________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  In sewers designed with self cleansing velocity________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter______________________?
Category: Civil Engineering Mcqs,   Published by: T-Code Scripts