For house drainage minimum gradient is__________________?
For house drainage minimum gradient is__________________?
A. 1 in 60
B. 1 in 80
C. 1 in 10
D. 1 in 400
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Which one of the following statements regarding septic tanks is wrong ?
Which one of the following statements regarding septic tanks is wrong ?A. A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided
B. The outlet invert level is kept 5 to 7.5 cm below the inlet invert level
C. The minimum width of septic level is 90 cm
D. The depth of tank is kept equal to its widthSpecific weight of water in S.I. units is equal to_________________?
Specific weight of water in S.I. units is equal to_________________?A. 1000 N/m3
B. 10000 N/m3
C. 9.81 xlO3 N/m3
D. 9.81 xlO6N/m3
E. 9.81 N/m3The sewage treatment units in which anaerobic decomposition of organic matter is used, are called________________?
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called________________?A. Imhoff tanks
B. Trickling filters
C. Sludge sedimentation tanks
D. None of theseIn 1000 kg of sewage, the total solids approximate___________________?
In 1000 kg of sewage, the total solids approximate___________________?A. 0.5 to 1.0 kg
B. 1 kg to 2.0 kg
C. 5 kg to 7.5 kg
D. 7.5 kg to 10 kgIn order that flow takes place between two points in a pipeline, the differential pressure between thes^ points must be more than_________________?
In order that flow takes place between two points in a pipeline, the differential pressure between thes^ points must be more than_________________?A. frictional force
B. viscosity
C. surface friction
D. all of the above
E. none of the aboveReynolds number is significant in____________________?
Reynolds number is significant in____________________?A. supersonics, as with projectile and jet propulsion
B. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc
C. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls
D. all of the above
E. none of the above