Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the

Mass Transfer
Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the

Viscosity variation of the fluids may cause channeling/flooding

Pressure drop in the equipment will be very high

None of these

Packing may be crushed due to thermal expansion/contraction of the components of the equipments

Viscosity variation of the fluids may cause channeling/flooding

Pressure drop in the equipment will be very high

None of these

Packing may be crushed due to thermal expansion/contraction of the components of the equipments

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Mass Transfer
Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.

Spray

None of these

Indirect tray

Freeze

Spray

None of these

Indirect tray

Freeze

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

Recommended peripherial speed of a rotary drier is in the range of 10 to 30 metres/minute

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.

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%

Rotary dryer is suitable for drying sticky material

Recommended peripherial speed of a rotary drier is in the range of 10 to 30 metres/minute

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.

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%

Rotary dryer is suitable for drying sticky material

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Mass Transfer
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Increases

Increases linearly

Decreases

Remains same

Increases

Increases linearly

Decreases

Remains same

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Mass Transfer
A coalescer in a mixer-settler liquid-liquid extraction coloumn

Helps in increasing the bubble size entering the settler

Helps in increasing the settling rate of the bubbles

Comprises of thin bed of substances of extended surface having high porosity

All of these

Helps in increasing the bubble size entering the settler

Helps in increasing the settling rate of the bubbles

Comprises of thin bed of substances of extended surface having high porosity

All of these

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

Packed extraction tower

Centrifugal extractor

Mixer-settler extractor

Pulsed extractor

Packed extraction tower

Centrifugal extractor

Mixer-settler extractor

Pulsed extractor

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Mass Transfer

Mass Transfer Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the

Mass Transfer Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.

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

Mass Transfer With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Mass Transfer A coalescer in a mixer-settler liquid-liquid extraction coloumn

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

Mass Transfer
Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the

Mass Transfer
Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.

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

Mass Transfer
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Mass Transfer
A coalescer in a mixer-settler liquid-liquid extraction coloumn

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