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.Management Sciences
Category: Waste Water Engineering
For trunk and out-fall, the type of sewers generally used, is_____________________?
A. Standard egg shaped
B. Circular shaped
C. Horse shoe shaped
D. Parabolic shaped
Chlorination of water is done for the removal of____________________?
A. Bacterias
B. Suspended solids
C. Sediments
D. Hardness
Which one of the following part of human body withstands minimum radiation ?
A. Thyroid
B. Kidneys
C. Eyes
D. Ovaries/testis
The sewer pipes__________________?
A. Carry sewage as gravity conduits
B. Are designed for generating self-cleansing velocities at different discharge
C. Should resist the wear and tear caused due to abrasion
D. All the above
A drop manhole is provided if__________________?
A. A sewer drops from a height
B. A branch sewer joins the main sewer at higher level
C. A lamp is inserted to check obstruction
D. None of these
If is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, Is_____________________?
A. 1.250 D
B. 1.350 D
C. 1.425 D
D. 1.625 D
The detention period for plain sedimentation water tanks, is usually____________________?
A. 4 to 8 hours
B. 8 to 16 hours
C. 16 to 24 hours
D. 24 to 36 hours
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________?
A. Carbondioxide gas
B. Hydrogen sulphide gas
C. Methane gas
D. Petrol vapours
If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is_________________?
A. 100 cm
B. 90 cm
C. 80 cm
D. 50 cm
In areas where rainy season is limited to a few months, the type of sewerage system recommended is__________________?
A. Combined system
B. Partially separate system
C. Separate system
D. None of these
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