Civil Engineering MCQs

2965 MCQs  (Page 127 of 297)

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Generally the detention period for grit chambers is kept as_______________?
A. 1 minute
B. 5 minutes
C. 2-4 hours
D. 12 hours
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Septic tank is a______________?
A. 1) settling tank
B. 2) digestion tank
C. 3) aeration tank
D. The correct answer is?
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Corrosion in concrete sewers is caused by______________?
A. Septic conditions
B. Dissolved oxygen
C. Chlorine
D. Nitrogen
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Sewage treatment units are designed for_______________?
A. Maximum flow only
B. Minimum flow only
C. Average flow only
D. Maximum and minimum flow
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The means of access for inspection and cleaning of sewer line is known as_______________?
A. Inlet
B. Manhole
C. Drop manhole
D. Catch basin
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Dissolved oxygen in streams is______________?
A. Maximum at noon
B. Minimum at noon
C. Maximum at midnight
D. Same throughout the day
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The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is______________?
A. 1 ppm
B. 4 ppm
C. 10 ppm
D. 40 ppm
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The ratio of 5 day BOD to ultimate BOD is about_______________?
A. 1/3
B. 2/3
C. 3/4
D. 1.0
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The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by_______________?
A. Tod>bod>cod
B. Tod>cod>bod
C. Bod>cod>tod
D. Cod>bod>tod
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Settling velocity increases with_______________?
A. Specific gravity of solid particles
B. Size of particles
C. Depth of tank
D. Temperature of liquid
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Word of the Day
28 Jul
Fragile
(of an object) easily broken or damaged.
نازک، کاغذی، آسانی سے ٹوٹ جانیوالا

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