A. Ammonia and nitrogen
B. Nitrogen and organic nitrogen
C. Organic nitrogen and ammonia
D. All the above
Related Mcqs:
- A well oxidized sewage contains nitrogen mainly as___________________?
A. Nitrates
B. Nitrites
C. Free ammonia
D. None of these - In sewage having fully oxidised organic matter, the nitrogen exists in the form of________________?
A. Nitrites
B. Nitrates
C. Free ammonia
D. Aluminoid nitrogen - 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 - Oxidation process results in the formation of___________________?
A. Carbon dioxide
B. Nitrates
C. Sulphates
D. All the above - For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of___________________?
A. 100 cm
B. 120 cm
C. 140 cm
D. 160 cm - Bottom openings 15 cm × 15 cm in the standing baffle wall are provided________________?
A. 15 cm c/c
B. 22.5 cm c/c
C. 30 cm c/c
D. 50 cm c/c - The sewer which resists sulphide corrosion, is____________________?
A. Brick sewer
B. Cast iron sewer
C. R.C.C. sewer
D. Lead sewer - The most widely used pump for lifting sewage is_________________?
A. Centrifugal pump
B. Reciprocating pump
C. Pneumatic ejector
D. Air pressure pump - The self-cleansing velocity of water flowing through pipe lines, is___________________ ?
A. 2 metres/sec
B. 1 metre/sec
C. 0.5 metre/sec
D. 0.25 metre/sec - The drop man holes are generally provided in sewers for____________________?
A. Industrial areas
B. Large town ships
C. Hilly town ships
D. Cities in plains
