Intermittent tube cleaning is possible to be done in case of a ________ evaporator?

The absorptivity of a grey body at a given temperature ________ with increasing wavelength of radiation?

The time taken for gravity flow of a fixed volume of liquid (as in Redwood viscometer) is directly proportional to its ________?

The amount of chemical coagulant added for treatment of polluted water ________ with increase in temperature of the polluted water to be treated?

Magnesium and calcium ________ cause temporary hardness of water?

________ stress cannot be sustained by a fluid in equilibrium?