Coke having higher porosity has ________?

Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove________?

Raschig ring made of porcelain cannot be used for treating concentrated________?

Vibrations in the tubes of a shell and tube heat exchanger is induced due to the ________?

The frequency response of a first order system, has a phase shift with lower and upper bounds given by________?

Holes for riveting purposes should be preferably made by________?