Viscosity

Q. A fluid with a viscosity of 0.1 Pa·s flows through a pipe of radius 0.05 m. If the pressure difference across the pipe is 1000 Pa, what is the flow rate?
  • A. 0.01 m³/s
  • B. 0.02 m³/s
  • C. 0.03 m³/s
  • D. 0.04 m³/s
Q. A fluid with a viscosity of 0.1 Pa·s flows through a pipe of radius 0.05 m. What is the shear stress if the flow rate is 0.01 m³/s?
  • A. 0.4 Pa
  • B. 0.2 Pa
  • C. 0.1 Pa
  • D. 0.5 Pa
Q. A fluid with a viscosity of 0.1 Pa·s flows through a pipe of radius 0.05 m. What is the shear stress if the flow velocity is 1 m/s?
  • A. 0.1 Pa
  • B. 0.2 Pa
  • C. 0.4 Pa
  • D. 0.5 Pa
Q. If a fluid has a viscosity of 0.5 Pa·s, what does this indicate about its flow characteristics?
  • A. It flows easily
  • B. It is very thick
  • C. It is a gas
  • D. It is a low-density fluid
Q. If the temperature of a liquid increases, what happens to its viscosity?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies unpredictably
Q. If the viscosity of a fluid is doubled, what happens to the flow rate through a constant diameter pipe?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Increases fourfold
Q. If the viscosity of a fluid is doubled, what happens to the flow rate through a pipe, assuming all other factors remain constant?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Increases fourfold
Q. If the viscosity of a fluid is high, what does it imply about the fluid's flow?
  • A. It flows easily
  • B. It flows slowly
  • C. It is incompressible
  • D. It is a gas
Q. If the viscosity of a liquid is doubled, how does it affect the flow rate through a pipe?
  • A. Flow rate doubles
  • B. Flow rate halves
  • C. Flow rate remains the same
  • D. Flow rate quadruples
Q. If the viscosity of a liquid is doubled, what happens to the flow rate through a pipe, assuming all other factors remain constant?
  • A. Flow rate doubles
  • B. Flow rate halves
  • C. Flow rate remains the same
  • D. Flow rate quadruples
Q. In a capillary tube, how does the viscosity of a fluid affect the height to which it rises?
  • A. Higher viscosity leads to higher rise
  • B. Higher viscosity leads to lower rise
  • C. Viscosity has no effect
  • D. It depends on the tube diameter
Q. In a fluid flowing through a pipe, what effect does increasing the temperature have on its viscosity?
  • A. Increases viscosity
  • B. Decreases viscosity
  • C. No effect
  • D. Depends on the fluid
Q. In a fluid flowing through a pipe, which factor does NOT affect the viscosity?
  • A. Temperature
  • B. Pressure
  • C. Fluid density
  • D. Fluid composition
Q. In a viscometer, what does the time taken for a fluid to flow through a capillary tube indicate?
  • A. Density of the fluid
  • B. Viscosity of the fluid
  • C. Temperature of the fluid
  • D. Pressure of the fluid
Q. In which of the following scenarios does viscosity increase?
  • A. Heating a fluid
  • B. Cooling a fluid
  • C. Adding a solvent
  • D. Increasing pressure
Q. In which of the following scenarios would you expect a fluid to have lower viscosity?
  • A. At lower temperatures
  • B. At higher temperatures
  • C. Under high pressure
  • D. In a narrow pipe
Q. In which of the following scenarios would you expect a fluid to have the lowest viscosity?
  • A. High temperature
  • B. Low temperature
  • C. High pressure
  • D. Low pressure
Q. In which of the following scenarios would you expect to observe a decrease in viscosity?
  • A. Cooling a liquid
  • B. Heating a liquid
  • C. Increasing pressure
  • D. Adding a solute
Q. In which of the following scenarios would you expect to see the effects of viscosity most prominently?
  • A. A river flowing rapidly
  • B. Oil pouring from a bottle
  • C. Air moving around a plane
  • D. Water boiling
Q. What effect does adding salt to water have on its viscosity?
  • A. Increases viscosity
  • B. Decreases viscosity
  • C. No effect
  • D. Varies with concentration
Q. What happens to the viscosity of a gas as temperature increases?
  • A. Viscosity decreases
  • B. Viscosity increases
  • C. Viscosity remains constant
  • D. Viscosity fluctuates
Q. What happens to the viscosity of a liquid as temperature increases?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies unpredictably
Q. What happens to the viscosity of gases with an increase in temperature?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies randomly
Q. What is the effect of adding a solute to a solvent on the viscosity of the solution?
  • A. Increases viscosity
  • B. Decreases viscosity
  • C. No effect
  • D. Depends on the solute
Q. What is the effect of adding salt to water on its viscosity?
  • A. Increases viscosity
  • B. Decreases viscosity
  • C. No effect
  • D. Depends on temperature
Q. What is the effect of increasing the molecular weight of a polymer on its viscosity?
  • A. Viscosity decreases
  • B. Viscosity increases
  • C. Viscosity remains the same
  • D. Viscosity becomes unpredictable
Q. What is the effect of pressure on the viscosity of gases?
  • A. Increases viscosity
  • B. Decreases viscosity
  • C. No effect
  • D. Depends on temperature
Q. What is the effect of pressure on the viscosity of liquids?
  • A. Increases viscosity
  • B. Decreases viscosity
  • C. No effect
  • D. Depends on the temperature
Q. What is the effect of temperature on the viscosity of liquids?
  • A. Increases with temperature
  • B. Decreases with temperature
  • C. Remains constant
  • D. Varies randomly
Q. What is the primary cause of viscosity in fluids?
  • A. Molecular interactions
  • B. Temperature
  • C. Pressure
  • D. Density
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