Minimum tube pitch recommended for shell and tube heat exchangers is about ________ times the outside diameter of the tube?

Half-life period for a first order reaction is ________ the initial concentration of the reactant?

In a distillation column, the minimum residence time for liquid in the downspout is about ________ seconds?

The purpose of providing a ‘catchall’ in the vapor line of an evaporator is to________?

Wohler test is a destructive test to find out the ________ strength of a prepared metal specimen?

Blast furnace coke is made from coal by________?