Civil Engineering MCQs

2965 MCQs  (Page 267 of 297)

For detecting the nitrates in sewage, the colour may be developed by adding________________?
A. Potassium permanganate
B. Sulphuric acid and napthamine
C. Phenol-di -sulphuric acid and potassium hydroxide
D. None of these
A drop manhole is provided if__________________?
A. A sewer drops from a height
B. A branch sewer joins the main sewer at higher level
C. A lamp is inserted to check obstruction
D. None of these
Antisyphonage pipe is fitted_______________?
A. At the end of septic tanks
B. On manholes
C. With a w.c. trap
D. At the beginning of sewer line
In a fully mechanised composting plant, involves________________?
A. Mechanized receipt
B. Mechanized segregation
C. Mechanized pulverising of refuse
D. All of these
The sewers___________________?
A. Must be of adequate size to avoid over flow
B. Must flow under gravity ½ to ¾ full
C. Must be laid at least 2 to 3 m deep to collect /water from the basements
D. All the above
Assertion A.: A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R): It helps to accommodate the scum in the septic tank_________________?
A. Both a and r is true and r is the correct explanation of a
B. Both a and r is true but r is not a correct explanation of a
C. A is true but r is false
D. A is false but r is true