Civil Engineering MCQs

2965 MCQs  (Page 120 of 297)

Alkalinity in water is expressed as milli-grams per litre in terms of equivalent_______________?
A. Calcium carbonate
B. Magnesium carbonate
C. Sodium carbonate
D. Calcium hydroxide
Turbidity is measured on_______________?
A. Standard silica scale
B. Standard cobalt scale
C. Standard platinum scale
D. Platinum cobalt scale
Residual chlorine in water is determined by________________?
A. Starch iodide method
B. Orthotolidine method
C. Both (a) and (b)
D. None of the above
If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to________________?
A. Total alkalinity
B. Total hardness
C. Total hardness – total alkalinity
D. Non carbonate hardness
The settling velocity of a particle in a sedimentation tank increases if______________?
A. Particle size is decreased
B. The surface area of tank is increased
C. The depth of tank is decreased
D. None of the above