Physics GK 13 - Viscosity

1. What of the following represents viscosity?
[A] resistance to fluid motion
[B] pressure difference between two fluids
[C] potential energy stored in a fluid
[D] roughness of the surface

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2. What is the SI unit of viscosity?
[A] candela
[B] poiseiulle
[C] Newton/m
[D] No units

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3. Which of these fluids has the highest viscosity?
[A] Water
[B] Honey
[C] Blood
[D] Air

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4. What happens to the viscosity of a liquid with increase in temperature?
[A] it increases
[B] it decreases
[C] it may increase or decrease
[D] No change

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5. What do we call the maximum velocity of a fluid in a tube for which the flow remains streamlined?
[A] Hyper velocity
[B] critical velocity
[C] stream velocity
[D] laminar velocity

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6. Which of the following represents Kinematic viscosity?
[A] Viscosity/temperature
[B] Viscosity/area
[C] Viscosity/density
[D] Viscosity/mass

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7. Which of the following is the SI unit of Kinematic viscosity?
[A] m3/s
[B] Kg/s
[C] m s-1
[D] m2/s

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8. What is the Gaussian unit of kinematic viscosity?
[A] Henry
[B] Stokes
[C] poiseiulle
[D] Watt

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9. Which of these ratios give the viscosity of a fluid?
[A] ratio of the shearing stress to the velocity gradient
[B] ratio of the shearing stress to the weight of the fluid
[C] ratio of the shearing stress to the density of fluid
[D] ratio of the velocity gradient and shearing stress

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10. What is Reynolds number?
[A] ratio of inertial force to viscous force
[B] ratio of weight of fluid to viscous force
[C] ratio of velocity gradient to viscous force
[D] reciprocal of viscous force

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