FOOD TECHNOLOGY (07/03/2021)

Q1. Shear-Thinning Liquids Are Also Called?

(A) Elastic
(B) Plastic
(C) Pseudoplastic
(D) All

ANSWER – (C) Pseudoplastic

  • In Rheology, Shear-Thinning Is The Non-Newtonian Behavior Of Fluids Whose Viscosity Decreases Under Shear Strain. It Is Sometimes Considered Synonymous For Pseudoplastic Behaviour.


Q2. Which Of The Following Is A Shear-Thinning Liquid?

(A) Condensed Milk
(B) Fruit Puree
(C) Soup
(D) All

ANSWER – (D) All

  • It Is Often Observed In Polymer Solutions And Molten Polymers, As Well As Complex Fluids And Suspensions Like Ketchup, Whipped Cream, Blood, Paint, And Nail Polish.

Q3. For Shear-Thickening Fluids, With An Increase In Shear Rate, Apparent Viscosity?

(A) Decreases
(B) Increases
(C) Do Not Change
(D) None

ANSWER – (B) Increases

  • Shear Thickening Materials Have Found A Choice Place As Smart Shock Absorbers. The Apparent Shear Viscosity Of These Non-Newtonian Fluids Increases With Increasing Shear Rate Under Static Deformation, The Material Will Flow While It Becomes Solid When Shear Stress Is Applied At A High Rate.


4. Which Of The Following Is A Shear Thickening Fluid?

(A) Cornstarch Suspension
(B) Wheatstarch Suspension
(C) Both
(D) None

ANSWER – (C) Both

  • The Corn Starch In Water And Wheat Starch In Water Both Are Good Examples Of Shear Thickening Fluids.

Q5. Shear Thickening Fluids Are Also Known As?

(A) Elastic
(B) Plastic
(C) Dilatent
(D) None

ANSWER – (C) Dilatent

  • A Dilatant Material Is One In Which Viscosity Increases With The Rate Of Shear Strain. Such A Shear Thickening Fluid, Also Known By The Initialism STF, Is An Example Of A Non-Newtonian Fluid. This Behaviour Is Usually Not Observed In Pure Materials, But Can Occur In Suspensions


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