Q1. During Evaporation Of Edible Solutions, The BPR-Boiling Point Rise Should Be _____ And The Foaming And Scale Formation Should Be _____?

A) Low, Minimum
B) High, Maximum
C) Low, Maximum
D) High, Minimum

Answer – A) Low, Minimum

• During Evaporation Of Edible Solutions, The BPR-Boiling Point Rise Should Be Low And The Foaming And Scale Formation Should Be Minimum.

READ MORE – FOOD TECHNOLOGY (15/03/2021)

Q2. One Disadvantage With Backward Feeding Is That The Feed Gets Very Concentrated At The Beginning Few Units Itself And Hence It’s Difficult To Feed It To The Next Evaporator Unit?

A) True
B) False

Answer – B) False

• One Disadvantage With Forward Feeding Is That The Feed Gets Very Concentrated At The Beginning Few Units Itself (Due To Direct Steam Supply With Provides High Heat) And Hence It’s Difficult To Feed It To The Next Evaporator Unit.

Q3. In Flashing Of Jams, The Temperature Of Concentrated Jam _____ On Flashing?

A) Decreases.,
B) Increases.
C) None Of The Above
D) Both A & B

ANSWER – B) Increases.

• In Flashing Of Jams, The Temperature Of Concentrated Jam Decreases On Flashing As The Source Of Ignition Is The Solvent Itself. Also, The Vapor Pressure Of The Concentrated Jam Sustains Combustion As The Temperature Is Brought Down To The Flash Point Which Is The Lowest Temperature At Which The Vapor Pressure Is Just Sufficient To Sustain Combustion.

READ MORE – FOOD TECHNOLOGY (25/03/2021)

Q4. Ratio Of Equilibrium Concentrations Of Solute A In Liquid Phase And Gas Phase I.E. CA_L* And CA_g* Respectively Is Α. Α Is Called _____?

A) Diffusion Coefficient
B) Distribution Coefficient
C) Mass Transfer Coefficient
D) None Of The Mentioned

Answer – B) Distribution Coefficient

• CA_L*/CA_g* = Α = Distribution Coefficient. In The Physical Sciences, A Partition Coefficient Or Distribution Coefficient Is The Ratio Of Concentrations Of A Compound In A Mixture Of Two Immiscible Solvents At Equilibrium. This Ratio Is Therefore A Comparison Of The Solubilities Of The Solute In These Two Liquids.

Q5. The Existence Of A Thick Constant Film Between Two Phases Is A Proposal By Which Of The Following Theories?

A) Film Theory
B) Penetration Theory
C) Surface Renewal Theory
D) All Of The Mentioned

Answer – A) Film Theory

• The Existence Of A Thick Constant Film Between Two Phases Is A Proposal By The Film Theory. Surface Renewal Theory Proposes That The Film Is Continuously Getting Renewed And Replaced By The Bulk Liquid.

READ MORE – FOOD TECHNOLOGY (04/04/2021)

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