Average annual rainfall at any station is the average of annual rainfall over a period of
A. 14 years
B. 21 years
C. 28 years
D. 35 years
Answer: Option D
A. 14 years
B. 21 years
C. 28 years
D. 35 years
Answer: Option D
The fire demand of a city may be worked out by
A. Kuichling’s formula
B. Freeman formula
C. Bustan’s formula
D. All the above
Mathamoglobinemia or blue baby disease is caused due to
A. Chlorides
B. Nitrites
C. Nitrates
D. Sulphides
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