The underground sewers are more subjected to________________?
A. Tensile force
B. Compressive force
C. Bending force
D. Shearing force
Waste Water Engineering
The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is____________________?
The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is____________________?
A. 20 m
B. 30 m
C. 45 m
D. 75 m
Facultative bacteria survive in_____________________?
Facultative bacteria survive in_____________________?
A. The presence of oxygen
B. The absence of oxygen
C. Both cases A. and B.
D. Neither A. nor B.
The maximum diameter of sewers adopted in the designs is_______________?
The maximum diameter of sewers adopted in the designs is_______________?
A. 1.0 m
B. 2.0 m
C. 3.0 m
D. 4.0 m
The formula V = (1/n) r2/3____________________?
The formula V = (1/n) r2/3____________________?
A. Chezy’s formula
B. Bazin’s formula
C. Kutter’s formula
D. Manning’s formula
The first stage of neutral process of sludge digestion, is__________________?
The first stage of neutral process of sludge digestion, is__________________?
A. Acid fermentation
B. Acid regressio
C. Alkaline fermentation
D. None of these
The self-cleansing velocity of water flowing through pipe lines, is___________________ ?
The self-cleansing velocity of water flowing through pipe lines, is___________________ ?
A. 2 metres/sec
B. 1 metre/sec
C. 0.5 metre/sec
D. 0.25 metre/sec
In very first stage of decomposition of the organic matter in sewage________________?
In very first stage of decomposition of the organic matter in sewage________________?
A. Nitrites are formed
B. Nitrates are formed
C. Carbondioxide is formed
D. Ammonia is formed
Design period of 40 to 50 years is adopted for_________________?
Design period of 40 to 50 years is adopted for_________________?
A. Branch sewers
B. Main sewers
C. Trunk sewers
D. All the above
The disintegrating pump in which solid matter is broken up before passing out, is__________________?
The disintegrating pump in which solid matter is broken up before passing out, is__________________?
A. Centrifugal pump
B. Reciprocating pump
C. Pneumatic ejector
D. None of these