Correct answer
A. All the above
Explanation
The correct answer is All the above.
For calculating the permissible stress 0 y /[(1 + a(l/r)2] is the empirical formula, known as________?
The object of photo-interpretation is________?
After storage, the strength of cement________?
Pick up the correct statement from the following?
3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is________?
Newton’s law of viscosity is a relationship between________?