FOOD TECHNOLOGY (06/04/2021)

Q1. Which Of The Following Denotes Gas Phase Mass Transfer Coefficient?

A) Sherwood Number
B) Lewis Number
C) Schmidt Number
D) None Of The Mentioned

Answer: (B) Lewis Number

  • Lewis Number Denotes Gas Phase Mass Transfer Coefficient As The Measurement Of Gas Phase Mass Transfer Is Not That Easy And Needs To Be Depicted By A Dimensionless Quantity.


Q2. 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

Answer: (D) All Of The Above

Thin-Layer Drying Means To Dry As One Layer Of Sample Particles Or Slices. Thin-Layer Drying Equations Have Been Used For Drying Time Prediction For Generalization Of Drying Curves Thin Layer Model Of Drying Beds In The Drying Of Grains Depends On All Of The Mentioned Points.

Q3. Tunnel Dryer Is Only A Continuous Version Of A Cabinet Tray Dryer?

A) True
B) False

Answer: (A) True

  • Tray Dryers Are Operated Under Batch Conditions. Tunnel Dryers Just Move These Trays While Hot Air Is Simultaneously Supplied.


Q4. 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

Answer: (B) Tray Dryer

  • Browning Of Heat-Sensitive Food Items May Take Place Due To Excess Exposure To Hot Air. Tray Dryer Has A High Residence Time. Hence, It Is The Most Possible Guess Out Of The Four.

 Q5. 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

Answer: (C) Rotary And Fluidized Bed Dryer

  • Both Rotary Dryer And Fluidized Bed Dryer Require Non-Sticky Granular Feed.


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