Which of the following must be stored in silos and not in open yard?

Pick out the wrong statement?

Entropy of the system decreases, when________?

Cascade control means ________?

A 0.5 m high bed made up of a 1 mm dia glass sphere (density 2500 kg/m3 ) is to be fluidised by water (density 1000 kg/m3 ). If at the point of incipient fluidisation, the bed voidage is 40%, the pressure drop across the bed is________?

Carbon Content by weight in air dried wood may be about ________ percent?