Practice Shear Stress (1.6) - Basics of Fluid Mechanics – I - Hydraulic Engineering - Vol 1

Practice: Shear Stress

Lesson 1.6Basics of Fluid Mechanics – I

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10 questions

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4 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is shear stress?
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Think about forces acting parallel to a surface.
Question 2.
How is viscosity defined?
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Consider how fluids behave when they flow.
3Question 3.
What is the formula for shear stress?
- \\( \\tau = \\frac{F}{A} \\)
- \\( \\tau = F \\times A \\)
- \\( \\tau = \\frac{A}{F} \\)
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Think of the relationship between force and area.
4Question 4.
True or False: In liquids, viscosity decreases with an increase in temperature.
- True
- False
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Consider how heat affects fluid flow.
Question 5.
A fluid with a viscosity of 0.75 Pa.s flows between two plates 5 cm apart. If the velocity gradient is 3 s⁻¹, calculate the shear stress and discuss its implications in fluid dynamics.
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Use the shear stress equation we discussed.
Question 6.
Calculate shear stress for a fluid where the viscosity is decreased from 0.7 Pa.s to 0.3 Pa.s while maintaining the same velocity gradient. What does this reveal about fluid behavior?
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Reflect on the relationship between viscosity and shear stress.

6 more questions in this section. Enroll free to practise them all.