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Module 2: Characteristics of Gases - Viscosity - Practice Problems

Instructions:: Work these problems on a sheet of paper and check your answers against those provided below.

#1

When the gas temperature increases, the absolute viscosity:

Decreases
Increases
Remains constant

: Answer: b. Increases; Solution:; When the gas temperature increases, the absolute viscosity increases due to greater molecular activity, which results in higher momentum transfer between molecules.

#2: If the absolute viscosity of a gas stream is 1,500 micropoise, what is the viscosity in units of centipoise?

: Answer: 0.15 cp; Solution:

#3: Calculate the absolute viscosity of a gas stream at 380°K with 10% moisture and 6% oxygen.

: Answer: 203.4 micropoise; Solution:

#4: The absolute viscosity for a gas stream in a stack is 0.025 cp. What is this viscosity in lb_m/ftsec?

: Answer: 1.68 10^-5 lb_m/ftsec; Solution:

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Viscosity

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