The ratio of depths at partial flo________________?
A. 1 –
B. 1 –
C. ½ (1 –
D. ½ (1 –
Civil Engineering Mcqs
If the grit in grit chambers is 4.5 million litres per day, its cleaning is done____________________?
If the grit in grit chambers is 4.5 million litres per day, its cleaning is done____________________?
A. Manually
B. Mechanically
C. Hydraulically
D. Electrically
The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is________________________?
The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is________________________?
A. 20 cm
B. 25 cm
C. 40 cm
D. 50 cm
Oxidation process results in the formation of___________________?
Oxidation process results in the formation of___________________?
A. Carbon dioxide
B. Nitrates
C. Sulphates
D. All the above
The sewerage system consists of______________________?
The sewerage system consists of______________________?
A. House sewer
B. Lateral sewer
C. Branch sewer
D. All of these
The minimum diameter of sewer to be adopted is_________________?
The minimum diameter of sewer to be adopted is_________________?
A. 10 cm
B. 12.5 cm
C. 15 cm
D. 25 cm
The porosity of sediments in sewer pipes, is usually taken as___________________?
The porosity of sediments in sewer pipes, is usually taken as___________________?
A. 0.010
B. 0.011
C. 0.012
D. 0.013
The presence of free ammonia in sewage, is detected by___________________?
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 digested sludge from septic tanks, is removed after a maximum period of__________________?
The digested sludge from septic tanks, is removed after a maximum period of__________________?
A. 3 years
B. 3.5 years
C. 4 years
D. 5 years
Disposal to sewage in large cities, is done in__________________?
Disposal to sewage in large cities, is done in__________________?
A. Irrigation
B. Dilution
C. Oxidation
D. Purification