Saw dust can be rendered chemically inert by boiling it in water containing
Options
A. ferrous sulphate
B. potassium chloride
C. ammonia
D. nitric acid
E. sulphuric acid.
Correct Answer
ferrous sulphate
Concrete Technology problems
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1. The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as
10. If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed