M8.2 Airflow around a body

What is the relationship between dynamic pressure and velocity in airflow around a body?

• Dynamic pressure is inversely proportional to the velocity.

• Dynamic pressure is directly proportional to the square of the velocity.

• Dynamic pressure is directly proportional to the velocity.

• Dynamic pressure is inversely proportional to the square of the velocity.

What is a "stream tube"?

• A tube with turbulent flow

• A tube with random airflow

• A tube with airflow similar to a closed tube

• A tube with zigzag airflow

What is the term used when the diameter of a duct decreases and the speed increases?

• Diffuser outlet

• Jet outlet

• Valve outlet

• Stream outlet

In which direction does dynamic pressure act?

• In all directions

• Opposite to flow

• Perpendicular to flow

• In the direction of flow

What happens if there is no dynamic pressure?

• There is maximum flow

• There is no flow

• Static pressure increases

• Total pressure decreases

What happens to static pressure as the speed of airflow increases in the Venturi tube?

• It increases

• It decreases

• It remains constant

• It fluctuates

What happens to static pressure after the airflow passes the narrowest point and into the wider part of the Venturi tube?

• It decreases

• It remains constant

• It increases

• It stops