What is viscosity?
A Flow resistance
B Fluid velocity
C Fluid density
D Pressure
What does the continuity equation express?
A Pressure distribution
B Mass conservation
C Energy conservation
D Velocity change
What causes drag in fluid flow?
A Velocity difference
B Fluid viscosity
C Object shape
D Pressure gradient
What happens when fluid velocity increases in Bernoulli’s equation?
A Density increases
B Viscosity decreases
C Pressure increases
D Pressure decreases
What does Reynolds number help predict?
A Pressure loss
B Flow type
C Fluid density
D Velocity change
What is an orifice used for in fluid mechanics?
A Measure pressure
B Measure velocity
C Measure flow rate
D Increase velocity
What is cavitation?
A Fluid viscosity change
B Vapor bubble formation
C Flow turbulence
D Fluid density increase
What does dimensional analysis help with in fluid mechanics?
A Measure velocity
B Calculate pressure
C Control flow
D Predict fluid behavior
What is the primary function of a pump?
A Increase pressure
B Measure velocity
C Reduce viscosity
D Increase temperature
What is the key cause of flow separation?
A High velocity
B Pressure gradient
C Low pressure
D High temperature
What does a weir measure in fluid systems?
A Flow rate
B Pressure
C Velocity
D Density
What happens during turbulent flow?
A Random motion
B Smooth motion
C Increased pressure
D Decreased velocity
What is the effect of high fluid viscosity?
A Increases pressure
B Increases turbulence
C Decreases flow rate
D Increases flow rate
What is an example of laminar flow?
A Airplane wing
B River current
C Water in a pipe
D Wind gusts
What is the main principle behind CFD simulations?
A Pressure measurement
B Fluid velocity
C Energy conservation
D Numerical approximation