Correct answer
D. Closed
Explanation
The correct answer is Closed.
The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about ________ decibels?
The line of action of the buoyant force acts through the________?
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be ________ percent?
Name the safety device used to protect the boiler, when the water level falls below a minimum level?
Conversion increases with increase in temperature in case of a/an ________ reaction?
Which of the following is not a condensation polymer?