For a given fluid, as the pipe diameter increases, the pumping cost ________?

An ideal PID controller has the transfer function [1 + (1/0.55) + 0.25]. The frequency at which the magnitude ratio of the controller is 1, is________?

Thermoplastic materials________?

Filter medium resistance is that offered by the________?

Colloidal mills are used for ________ grinding?

Which of the following decreases during evaporative cooling process with recirculated water supply?