18. The pump coverts energy (external driving source) into kinetic energy in the fluid bygiving impulses to the fluid by impellers. A diffuser or volute converts most of the kinetic energyinto pressure, i.e. these machines use the basic law (Bernoulli’s) of converting potential energyinto kinetic energy. What pumps are above description?
(A) Rotary pumps
(B) Displacement pumps
(C) Gear pumps
(D) Centrifugal pumps