Civil Engineering MCQs

2965 MCQs  (Page 273 of 297)

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In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is____________________?
A. [(100 + p1)/(100 – p2)] v1
B. [(100 – p1)/(100 + p2)] v1
C. [(100 – p1)/(100 – p2)] v1
D. [(100 + p2)/(100 – p1)] v1
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You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at___________________?
A. Full depth
B. Half full
C. Two third full
D. Three fourth full
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For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is________________?
A. 10 cm
B. 12 cm
C. 15 cm
D. 18 cm
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The sewer pipe which carries sewage from a building for immediate disposal is______________?
A. House sewer
B. Lateral sewer
C. Intercepting sewer
D. Main sewer
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Clogging of sewers, is caused due to_______________?
A. Silting
B. Low discharge
C. Greasy and oily matters
D. All the above
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In sewage having fully oxidised organic matter, the nitrogen exists in the form of________________?
A. Nitrites
B. Nitrates
C. Free ammonia
D. Aluminoid nitrogen
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Dry water flow in a combined sewer, is______________________?
A. Industrial sewage
B. Domestic sewage
C. Storm water
D. Inclusive of domestic and industrial sewage but excludes storm water
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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?
A. Both a and r are true and r is the correct explanation of a
B. Both a and r are true but r is not a correct explanation of a
C. A is true but r is false
D. A is false but r is true
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Flocculated particles do not change their___________________?
A. Size
B. Shape
C. Weight
D. None of these
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When drainage to sewage ratio is 20, the peak dry weather flow is_______________?
A. 20% of the design discharge
B. Slightly less than 5% of the design discharge
C. Slightly more than 5% of the design discharge
D. None of these
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Word of the Day
26 Jul
Simultaneously
at the same time.
ایک ہی وقت میں، ایک ساتھ، بیک وقت

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