EIT Fluid Mechanics 3

Question 1

What does a Moody diagram show?

Accepted Answer

Friction factor as a function of Reynolds number and relative roughness

Answer

Velocity profile in laminar flow

Answer

Pressure vs. flow rate for a pump

Answer

Buoyancy vs. submerged volume

Question 2

For a venturi meter, flow velocity is highest at:

Accepted Answer

The throat (narrowest section)

Answer

The inlet

Answer

The outlet

Answer

The midpoint of the diverging section

Question 3

The kinematic viscosity ν is defined as:

Accepted Answer

μ / ρ

Answer

μ × ρ

Answer

ρ / μ

Answer

μ + ρ

Question 4

What does the Euler number represent in fluid mechanics?

Accepted Answer

Ratio of pressure forces to inertial forces

Answer

Ratio of inertial to viscous forces

Answer

Ratio of gravitational to inertial forces

Answer

Ratio of surface tension to inertial forces

Question 5

Which phenomenon occurs when local static pressure in a liquid drops below vapor pressure?

Accepted Answer

Cavitation

Answer

Turbulence

Answer

Separation

Answer

Choking

Question 6

For open-channel flow, the Froude number Fr = 1 indicates:

Accepted Answer

Critical flow

Answer

Subcritical flow

Answer

Supercritical flow

Answer

Laminar flow