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Chemical Engineering Basics

Q1: The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.

A air

B water

C mercury

D alcohol

ANS:B - water

The kinematic viscosity (ν) and the absolute viscosity (η), also known as dynamic viscosity, are related through the equation: ν=η/p​ Where:

  • ν is the kinematic viscosity (in stokes)
  • η is the absolute viscosity (in poise)
  • ρ is the density of the fluid
At room temperature (around 20°C or 68°F), the kinematic viscosity and absolute viscosity are approximately the same for water. So, the correct answer is: water



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