Engineering Certification Engineering Certification Thermodynamics & Fluid Mechanics

Question 1

Which thermodynamic law states that energy cannot be created or destroyed, only converted from one form to another?

Accepted Answer

First Law

Answer

Zeroth Law

Answer

Second Law

Answer

Third Law

Question 2

What does the Second Law of Thermodynamics state about heat transfer?

Accepted Answer

Heat flows spontaneously from hot to cold bodies

Answer

Heat flows spontaneously from cold to hot bodies

Answer

All heat can be converted to work

Answer

Entropy of a system always decreases

Question 3

In fluid mechanics, what does Bernoulli's equation relate?

Accepted Answer

Pressure, velocity, and elevation in a flowing fluid

Answer

Viscosity, temperature, and density

Answer

Reynolds number and flow regime

Answer

Friction factor and pipe roughness

Question 4

What is the Reynolds number used to determine in fluid mechanics?

Accepted Answer

Whether flow is laminar or turbulent

Answer

Fluid temperature at a given pressure

Answer

The friction force on a submerged surface

Answer

The velocity of sound in a fluid

Question 5

Which thermodynamic process occurs at constant temperature?

Accepted Answer

Isothermal

Answer

Isobaric

Answer

Isochoric

Answer

Adiabatic

Question 6

What is the continuity equation in fluid mechanics based on?

Accepted Answer

Conservation of mass

Answer

Conservation of momentum

Answer

Conservation of energy

Answer

Newton's third law