Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is________?

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then________?

The value of fouling factor depends upon the________?

With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature)?

In case of a, centrifugal pump, the ratio h1/h2 is termed as the ________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?

Lead is added to 60:40 brass primarily to improve________?