- 1. Fluid dynamics is the study of the behavior of liquids and gases in motion. It deals with how fluids flow, how they interact with boundaries, objects, and other fluids, and how their properties like velocity, pressure, and density vary in different conditions. Fluid dynamics has applications in various fields such as engineering, meteorology, biology, and oceanography, helping us understand phenomena like ocean currents, airflow around aircraft, blood flow in the human body, and weather patterns. By predicting and analyzing fluid behavior, researchers and engineers can develop better designs, optimize processes, and solve practical problems in a wide range of industries.
What is the study of fluid dynamics concerned with?
A) The behavior of light waves
B) The study of animal behavior
C) The properties of solid materials
D) The motion of liquids and gases
- 2. Which physical property describes a fluid's resistance to flow?
A) Temperature
B) Viscosity
C) Density
D) Pressure
- 3. What does Bernoulli's Principle state?
A) Pressure and speed of a fluid are unrelated
B) Fluid pressure always increases with speed
C) As the speed of a fluid increases, its pressure decreases
D) The pressure of a fluid is constant at all speeds
- 4. Which law describes the relationship between the pressure and volume of a gas?
A) Charles's Law
B) Avogadro's Law
C) Boyle's Law
D) Gay-Lussac's Law
- 5. What is the phenomenon where fluid flows in parallel layers with no disruption between them?
A) Unsteady flow
B) Turbulent flow
C) Steady flow
D) Laminar flow
- 6. Which device is commonly used to measure fluid velocity?
A) Manometer
B) Pitot tube
C) Hydrometer
D) Flow meter
- 7. What is the dimensionless quantity that represents the ratio of inertial forces to viscous forces in a fluid?
A) Friction factor
B) Mach number
C) Froude number
D) Reynolds number
- 8. What type of flow pattern is chaotic and irregular?
A) Steady flow
B) Turbulent flow
C) Unsteady flow
D) Laminar flow
- 9. Which law states that the volume of a gas is directly proportional to its temperature at constant pressure?
A) Boyle's Law
B) Avogadro's Law
C) Charles's Law
D) Gay-Lussac's Law
- 10. How does adding impurities affect the viscosity of a fluid?
A) Causes fluid to solidify
B) No effect on viscosity
C) Decreases viscosity
D) Increases viscosity
- 11. What is the relationship between fluid pressure and fluid depth in a stationary fluid?
A) Pressure is constant at all depths
B) Pressure varies randomly with depth
C) Pressure decreases with depth
D) Pressure increases with depth
- 12. What is the difference between dynamic viscosity and kinematic viscosity?
A) Dynamic viscosity squared
B) Dynamic viscosity multiplied by fluid density
C) There is no difference
D) Dynamic viscosity divided by fluid density
- 13. What effect causes water to rise inside a thin tube inserted into a liquid?
A) Capillary action
B) Evaporation
C) Surface tension
D) Buoyancy
- 14. What is the type of flow where the fluid velocity at any point does not change with time?
A) Laminar flow
B) Steady flow
C) Turbulent flow
D) Irregular flow
- 15. What term is used to describe the force that a fluid exerts on an object moving through it?
A) Lift
B) Tension
C) Buoyancy
D) Drag
- 16. What phenomenon occurs when a fluid flows past an object and the flow is disturbed, causing swirling and eddies?
A) Vortex shedding
B) Laminar flow
C) Turbulence
D) Stagnation
- 17. What is the name for the point at which the velocity of a fluid becomes zero during flow around an object?
A) Stagnation point
B) Vortex point
C) Boundary point
D) Cavitation point
- 18. What phenomenon occurs when the pressure in a flowing fluid drops below the vapor pressure, causing the formation of vapor bubbles?
A) Turbulence
B) Evaporation
C) Cavitation
D) Capillarity
- 19. What is the negative effect of cavitation in fluid systems?
A) Improved heat transfer
B) Increased flow efficiency
C) Reduced noise levels
D) Erosion and damage to equipment
- 20. What is the SI unit of viscosity?
A) Meter squared per second
B) Newton per meter
C) Kilogram per cubic meter
D) Pascal-second
- 21. What is the SI unit of pressure?
A) Watt
B) Newton
C) Pascal
D) Joule
- 22. What is the formula for calculating dynamic pressure in a fluid flow?
A) P = F / A
B) P = ρ g h
C) 0.5 * ρ * V2
D) P = ρ * V
- 23. What is the principle behind a siphon's ability to transfer fluid from one container to another?
A) Heat conduction
B) Capillarity effect
C) Surface tension
D) Atmospheric pressure
- 24. Bernoulli's equation relates the conservation of what quantity in fluid flow?
A) Mass
B) Momentum
C) Volume
D) Energy
- 25. Which law states that the velocity of a fluid increases as the pressure of the fluid decreases?
A) Pascal's principle
B) Newton's third law
C) Bernoulli's principle
D) Charles' law
- 26. What is the term for the force that opposes the relative motion of solid surfaces in contact with each other, within a fluid layer?
A) Turbulence
B) Frictional drag
C) Lift
D) Buoyancy
- 27. What is the force per unit area required to keep a fluid flowing?
A) Pressure gradient
B) Volumetric flow rate
C) Shear stress
D) Surface tension
- 28. What is the unit of dynamic viscosity in the SI system?
A) Kg/m3
B) m2/s
C) N/m2
D) Pa s
- 29. What is the formula for calculating shear stress in a fluid?
A) τ = μ * du/dy
B) τ = ρ * g * h
C) τ = ρ * V
D) τ = F / A
- 30. What is the term for the energy lost due to fluid friction and turbulence?
A) Bernoulli's loss
B) Friction drag
C) Head loss
D) Energy deficit
- 31. What is the phenomenon where a fluid flows faster through a narrowed section of a pipe, causing a decrease in pressure?
A) Shock wave
B) Diffusion
C) Cavitation
D) Venturi effect
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