BCE Hydraulics & Fluid Mechanics

Question 1

What does Bernoulli's equation primarily conserve in fluid flow?

Accepted Answer

Energy

Answer

Mass

Answer

Momentum

Answer

Pressure

Question 2

Which dimensionless number represents the ratio of inertial forces to viscous forces in fluid flow?

Accepted Answer

Reynolds number

Answer

Froude number

Answer

Weber number

Answer

Mach number

Question 3

What is the hydraulic radius of a circular pipe flowing full with diameter D?

Accepted Answer

D/4

Answer

D/2

Answer

D

Answer

πD/4

Question 4

Manning's equation is primarily used to calculate flow in which type of system?

Accepted Answer

Open channel flow

Answer

Pressurized pipe flow

Answer

Pump systems

Answer

Compressible gas flow

Question 5

Which type of flow occurs when the Froude number is less than 1 in an open channel?

Accepted Answer

Subcritical flow

Answer

Supercritical flow

Answer

Critical flow

Answer

Turbulent flow

Question 6

The specific energy in an open channel is defined as the energy head measured above which datum?

Accepted Answer

The channel bottom

Answer

Sea level

Answer

The water surface

Answer

The centerline of flow