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Dehydration MCQ Questions & Answers

Dehydration MCQs : This section focuses on the "Dehydration". These Multiple Choice Questions (MCQs) should be practiced to improve the Dehydration skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

On wet basis, the denominator stays constant whereas in moisture content on dry basis, the denominator changes.

A. TRUE
B. FALSE

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Question 2

Which of the following is also called a ring dryer?

A. Pneumatic conveyor dryer
B. Drum dryer
C. Freeze dryer
D. Spray dryer

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Question 3

Which of the following dryers is used for making baby food?

A. Pneumatic conveyor dryer
B. Drum dryer
C. Freeze dryer
D. Spray dryer

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Question 4

What does the thin layer model of drying beds in drying of grains depend on?

A. Temperature of air
B. Air flow
C. Initial moisture content
D. All of the mentioned

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Question 5

Which of the following dryers requires non-sticky granular feed?

A. Rotary dryer
B. Fluidized bed dryer
C. Rotary & Fluidized bed dryer
D. None of the mentioned

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Question 6

Drying rate curve is plot between _____ and _____

A. Critical moisture content, critical humidity
B. Critical moisture content, drying rate
C. Critical humidity, drying rate
D. Moisture content, drying rate

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Question 7

After incipient fluidization, the pressure briefly _____

A. Increases
B. Decreases
C. Stays constant
D. Varies exponentially

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Question 8

Cabinet tray dryers are not very effective as they do not completely strip off the moisture content from the food item. Hence, they need to be combined with another dryer for effective results.

A. TRUE
B. FALSE

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Question 9

Advantage of turbo dryer over cabinet tray dryer is _____

A. It is more effective
B. The feed is uniformly heated at the edges
C. None of the mentioned
D. It is more effective & the feed is uniformly heated at the edges

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Question 10

The point where the constant drying period changes to falling rate period is called _____

A. Equilibrium moisture content
B. Critical moisture content
C. Critical humidity
D. Bound moisture content

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Question 11

The EMC-RH data is fitted to Henderson's equation. Which of the following is true about the relative humidity with respect to food technology terminology?

A. It is also called water activity
B. It is irrelevant with respect to food technology
C. None of the mentioned
D. All of the mentioned

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Question 12

Moisture on dry basis cannot be more than a hundred percentage.

A. TRUE
B. FALSE

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Question 13

Tunnel dryer is only a continuous version of a cabinet tray dryer.

A. TRUE
B. FALSE

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Question 14

Which of the following dryers cannot take a feed in the form of pastes/slurries/sticky items?

A. Drum dryer
B. Screw conveyor dryer
C. Pneumatic dryer
D. Spray dryer

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Question 15

Which of the following denotes gas phase mass transfer coefficient?

A. Sherwood number
B. Lewis number
C. Schmidt number
D. None of the mentioned

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Question 16

Coffee powders can be made from which of the following dryers?

A. Pneumatic conveyor dryer
B. Drum dryer
C. Freeze dryer
D. Spray dryer

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Question 17

Hannah ordered one ton of mushrooms. But, the entire lot was brown. Which dryer could it possibly have been?

A. Bin dryer
B. Tray dryer
C. Tower Dryer
D. Vacuum dryer

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