Testraer

Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.

• chemical properties
• physical properties
• degree of turbulence
• interfacial area

Answer explanation

Jupiter is a gas giant made primarily of hydrogen and helium. Unlike terrestrial planets that have solid surfaces, gas giants like Jupiter don't have a well-defined solid surface, allowing them to accumulate more mass in a gaseous form. This composition has allowed Jupiter to grow significantly larger than planets with solid surfaces.

In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is

• 0.5
• 0.6
• 2.0
• 1.0

Fenske equation determines the

• maximum number of ideal plates.
• height of the distillation column.
• minimum number of theoretical plates.
• optimum reflux ratio.

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

• cold water leaving the tower and the wet bulb temperature of the surrounding air.
• hot water entering the tower and the wet bulb temperature of the surrounding air.
• hot water entering the tower and the cooled water leaving the tower.
• none of these

Which of the following is the most suitable for extraction in a system having very low density difference?

• Mixer-settler extractor
• Centrifugal extractor
• Pulsed extractor
• Packed extraction tower

Total reflux in a distillation operation requires minimum

• reboiler load
• number of plates
• condenser load
• all (a), (b) and (c)

The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by

• raising the temperature.
• lowering the total pressure.
• both (a) and (b).
• neither (a) nor (b).

The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is

• (+)ve
• (-)ve
• zero
• none of these

Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the

• relative volatility is reasonably constant.
• mixture (to be separated) shows negative deviation from ideality.
• mixture (to be separated) shows positive deviation from ideality.
• multicomponent distillation is involved.

When the temperature and humidity of air is low, we usually use __________ draft cooling tower.

• natural
• forced
• induced
• none of these