Waste Water Engineering - Part 1 Online Exam Quiz
Waste Water Engineering - Part 1 GK Quiz. Question and Answers related to Waste Water Engineering - Part 1. MCQ (Multiple Choice Questions with answers about Waste Water Engineering - Part 1
The minimum recommended diameter of sewers, is
Options
A : 5 cm
B : 10 cm
C : 15 cm
D : 20 cm.
Aerobic bacterias
Options
A : flourish in the presence of free oxygen
B : consume organic matter as their food
C : oxidise organic matter in sewage
D : All the above.
The rate of accumulation of sludge in septic tanks is recommended as
Options
A : 30 litres/person/year
B : 25 litres/person/year
C : 30 litres/person/month
D : 25 litres/person/month.
If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is
Options
A : 200 ppm
B : 225 ppm
C : 250 ppm
D : None of these.
If D is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is
Options
A : D
B : 1.25 D
C : 1.5 D
D : 1.75 D
If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is
Options
A : 1 in 60
B : 1 in 100
C : 1 in 120
D : none of these.
The non-clog pump which permits solid matter to pass out with the liquid sewage, is
Options
A : centrifugal pump
B : reciprocating pump
C : pneumatic ejector
D : none of these.
The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is
Options
A : 0.68 m
B : 0.88 m
C : 1.36 m
D : 1.76 m.
Pick up the correct statement from the following :
Options
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.
In olden days the type of section adopted in trunk and out fall sewers was
Options
A : parabolic shaped
B : horse shoe shaped
C : egg shaped
D : circular shaped.
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