A. Flow velocity is kept 0.09 m/sec
B. Detention period is kept 3 to 4 minutes
C. Organic and inorganic materials are separated
D. All the above
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
A. linear
B. parabolic
C. hyperbolic
D. inverse type
E. none of the above
A. increases
B. decreases
C. remains unaffected
D. unpredictable
E. none of the above
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
A. First cost + interest of first cost
B. Annual cost – interest of first cost
C. First cost + cost of perpetual maintenance
D. First cost + salvage value
A. 0°C
B. 0°K
C. 4°C
D. 100°C
E. 20°C.