Allied & ICAR Exam Bank • ALLIED_1338 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Food Rheology and Texture

Subtopic: Dilatant Fluid

Question Statement:

A food fluid exhibiting dilatant (shear-thickening) rheological behavior is characterized by a flow behavior index $n$ satisfying:

Options:

  • (A) n > 1
  • (B) n < 1
  • (C) n = 1
  • (D) n = 0

Answer Key:

A

Step-by-Step Solution & Explanation

In shear-thickening fluids (such as concentrated starch slurries), $n > 1$, causing apparent viscosity to increase as shear rate increases due to particle crowding and dilation of void space.
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