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Quiz

Chapter 1 Introduction

Joshua Halsted 6 Fragen

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Fragen in diesem Quiz (6)

  1. 1The absolute viscosity μ of a fluid is primarily a function of
    1. ADensity
    2. BTemperature
    3. CPressure
    4. DVelocity
    5. ESurface Tension
  2. 2An oil has a kinematic viscosity of 1.25 E-4 m^2/s and a specific gravity of 0.80. What is its dynamic viscosity in kg/(m*s)?
    1. A0.08
    2. B0.10
    3. C0.125
    4. D1.0
    5. E1.25
  3. 3Helium has a molecular weight of 4.003. What is the weight of 2 m^3 of helium at 1 atm and 20 degrees Celsius?
    1. A3.3 N
    2. B6.5 N
    3. C11.8 N
    4. D23.5 N
    5. E94.2 N
  4. 4The only possible dimensionless group that combines velocity V, body size L, fluid density ρ, and surface tension coefficient σ is:
    1. AL*ρ*σ/V
    2. Bρ*V*L^2/σ
    3. Cρ*σ*V^2/L
    4. Dσ*L*V^2/ρ
    5. Eρ*L*V^2/σ
  5. 5A certain water flow at 20 degrees Celsius has a critical cavitation number, where bubbles form, Ca = 0.25, where Ca = 2(P_a-P_vap)/(ρ*V^2). If P_a = 1 atm and the vapor pressure is 0.34 pounds per square inch absolute (psia), for what water velocity will bubbles form?
    1. A12 mi/h
    2. B28 mi/h
    3. C36 mi/h
    4. D55 mi/h
    5. E63 mi/h
  6. 6Two parallel plates, one moving at 4 m/s and the other fixed, are separated by a 5-mm-thick layer of oil of specific gravity 0.80 and kinematic viscosity of 1.25 E-4 m^2/s. What is the average shear stress in the oil?
    1. A80 Pa
    2. B100 Pa
    3. C125 Pa
    4. D160 Pa
    5. E200 Pa

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Quiz am Chapter 1 Introduction, erstellt von Joshua Halsted am 18/08/2017.
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English
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