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
✅ The correct answer is option A.
Civil Engineering Mcqs MCQs
12. The presence of free ammonia in sewage, is detected by___________________?
A. Boiling
B. Adding potassium permanganate
C. Adding sulphuric acid
D. Phenol-di-sulphuric acid
✅ The correct answer is option A.
13. The flow which neglects changes in a transverse direction is known as ____________________?
A. one dimensional flow
B. uniform flow
C. steady flow
D. turbulent flow
✅ The correct answer is option A.
14. The disintegrating pump in which solid matter is broken up before passing out, is__________________?
A. Centrifugal pump
B. Reciprocating pump
C. Pneumatic ejector
D. None of these
✅ The correct answer is option A.
15. Nitrogen cycle of sewage, is____________________?
A. Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen
B. Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates
C. Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia
D. Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates
✅ The correct answer is option A.
16. The recommended detention period for grit chambers is_______________?
A. 1 minute
B. 2 minutes
C. 3 minutes
D. 5 minutes
✅ The correct answer is option A.
17. If is the diameter of upper circular portion, the area of cross-section of a standard egg shaped sewer, is____________________?
A. D²
B. D²
C. D²
D. D²
✅ The correct answer is option A.
18. Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is ?
A. Centrifugal pump
B. Pneumatic ejector
C. Reciprocating pump
D. None of these
✅ The correct answer is option A.
19. 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 kg
✅ The correct answer is option A.
20. Center of buoyancy is the___________________?
A. centroid of the displaced volume of fluid
B. center of pressure of displaced volume
C. e.g. of floating ‘body
D. does not exist
✅ The correct answer is option A.