A. cm/minute
B. cm/hour
C. cm/day
D. None of these
Related Mcqs:
- A rain sanitary sewer is constructed to carry_________________ ?
A. Sanitary sewage
B. Storm sewage
C. Surface water
D. Ground water - If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be____________________?
A. h
B. wh
C. w/h
D. h/w
E. h/wh - The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if __________________?
A. the area is horizontal
B. the area is vertical
C. the area is inclined
D. all of the above
E. none of the above - In sewers the highest non-scouring velocity is achieved in________________?
A. Glazed bricks sewers
B. Cast iron sewers
C. Cement concrete sewers
D. Stone ware sewers - Rain drops are spherical because of____________________?
A. viscosity
B. air resistance
C. surface tension forces
D. atmospheric pressure
E. none of the above - Pick up the correct statement from the following ?
A. Maximum daily flow = 2 times the average daily flow
B. Maximum daily flow = average daily flow
C. Sewers are designed for minimum permissible velocity at minimum flow
D. All the above - 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 - If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of__________________?
A. Degradation
B. Active decomposition
C. Recovery
D. Cleaner water - pH value of sludge during alkaline regression stage, is__________________?
A. More than 7
B. Less than 7
C. Less than 6
D. More than 6 - In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is____________________?
A. Q/(B × D)
B. Q/(L × D)
C. Q/L
D. Q/(B × L)
