Kuis Aliran Fluida

A flow is said to be laminar if...

• There are random fluctuations in speed

• The streamlines are irregular

• Inertia forces are more dominant than viscous forces

• Viscous forces are greater than inertia forces

The critical Reynolds number for flow in a circular pipe is approximately...

• 1000

• 2300

• 10,000

• 4000

The region from the entry of the fluid until the velocity profile becomes uniform is called...

• Fully developed region

• Entrance region

• Core region

• Boundary layer

The hydrodynamic entry length for laminar flow is generally proportional to...

• Reynolds number and pipe diameter

• Only pipe diameter

• The square of the average velocity

• The inverse of surface roughness

In fully developed laminar flow, the velocity profile has the shape of...

• Parabolic

• Linear

• Exponential

• Logarithmic

The relationship between maximum velocity and average velocity in laminar flow in a circular pipe is...

• Vmax = 1.25 Vavg

• Vmax = 2 Vavg

• Vmax = 3 Vavg

• Vmax = 4 Vavg

The Poiseuille equation shows that the pressure drop is proportional to...

• Pipe length and fluid viscosity

• Pipe cross-sectional area

• The square root of average velocity

• Surface roughness

If the pipe diameter is doubled, the power requirement for a constant flow rate will...

• Decrease drastically

• Remain the same

• Double

• Not be affected

In laminar flow, the Darcy friction factor (f) depends on...

• Reynolds number

• Surface roughness

• Pipe length

• Static pressure

The effect of gravity on an inclined pipe causes changes in...

• Pressure along the pipe

• Fluid viscosity

• Surface roughness

• Effective pipe length