Introduction to drying

Introduction to drying

Assessment

Quiz

Other

University

Hard

Created by

Dhritiman Debnath

Used 10+ times

FREE Resource

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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why direct heating by hot air cannot be done in some cases?

The material can degrade

High temperature not required

Low temperature not required

Conduction gives best results

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When are drum dryers used?

When the material is too thick for spray dryer and too thin for rotary dryer

When the material is too thick for rotary dryer and too thin for spray dryer

When the material is not biodegradable

When large crystal size is to be obtained

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is heating achieved in drum dryers?

By heating the drums

By conduction

By passing steam through hollow screws

By passing steam through the conveyer belt

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the drum dryer called if it is open to the atmosphere?

Open dryer

Box dryer

Trough dryer

Trench dryer

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which materials are not used in drying in a freeze dryer?

Seafood

Fruits

Pharmaceuticals

Dyes

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How the liquid does gets separated in freeze dryer?

Evaporation

Freezing and crystallization

Distillation

Boiling

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Heat sensitive or easily oxidizable materials are dried by:

Flash dryer

Drum dryer

Fluidized bed dryer

Rotary dryer

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