EIT Fluid Mechanics 2

Question 1

The Darcy-Weisbach equation is used to calculate:

Accepted Answer

Head loss due to friction in a pipe

Answer

Buoyant force

Answer

Hydraulic pressure at a point

Answer

Velocity of flow at a nozzle

Question 2

What is the Mach number of a flow with velocity 340 m/s in air where the speed of sound is 340 m/s?

Accepted Answer

1.0

Answer

0.5

Answer

2.0

Answer

0.34

Question 3

Which type of flow has fluid layers moving parallel to each other without mixing?

Accepted Answer

Laminar flow

Answer

Turbulent flow

Answer

Transitional flow

Answer

Compressible flow

Question 4

A Pitot tube measures:

Accepted Answer

Stagnation (total) pressure

Answer

Fluid viscosity

Answer

Static pressure only

Answer

Flow rate

Question 5

What is the hydraulic diameter of a square duct with side length a?

Accepted Answer

a

Answer

2a

Answer

4a

Answer

a/2

Question 6

In fluid statics, the center of pressure on a submerged vertical surface is located:

Accepted Answer

Below the centroid

Answer

At the centroid of the surface

Answer

Above the centroid

Answer

At the free surface