Mass Transfer
Pick out the wrong statement. Raoult's law does not apply, when the

Size of component molecules are not equal
Chemical combination or molecular association between unlike molecules takes place in the formation of solution
Component molecules are nonpolar
Attractive forces between like and unlike molecules in the solution are approximately equal

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Pick out the wrong statement pertaining to the rotary dryer.

Hold up of a rotary drier is defined as the fraction of the dryer volume occupied by the solid at any instant. The best performance for rotary drier is obtained, when the hold up is in the range of 0.
Recommended peripherial speed of a rotary drier is in the range of 10 to 30 metres/minute
Rotary dryer is suitable for drying sticky material
Flights (located in the inside shell of rotary dryer) lift the material being dried and shower it down through the current of hot air/gases. It extends from the wall to a distance which is about 8-12%

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
The term "cooling range" in a cooling tower refers to the difference in the temperature of

Hot water entering the tower and the cooled water leaving the tower
Hot water entering the tower and the wet bulb temperature of the surrounding air
None of the listed here
Cold water leaving the tower and the wet bulb temperature of the surrounding air

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Mass Transfer