The GATE Grind

GATE 2026 BT – Question 45

Fundamentals of Biological Engineering · Bioreaction Engineering: Batch, fed-batch and continuous processes, microbial and enzyme reactors, optimization and scale up · 2 marks · Multiple select

For a Newtonian fluid, a plot of shear stress (on Y axis) against shear rate (on X axis) will result in a straight line ________.

  1. parallel to the X axis
  2. parallel to the Y axis
  3. with a negative slope
  4. with a positive slope

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (D) with a positive slope

Explanation

For a Newtonian fluid $\tau = \mu\dot\gamma$, a straight line through the origin whose slope is the viscosity, which is positive.