Fundamentals of Engineering Fluid Mechanics and Thermodynamics

Question 1

Bernoulli's equation is derived from conservation of which quantity along a streamline?

Accepted Answer

Energy

Answer

Mass

Answer

Momentum

Answer

Volume

Question 2

What is the hydrostatic pressure at a depth h in a fluid of density ρ?

Accepted Answer

ρgh

Answer

ρg/h

Answer

ρ/gh

Answer

gh/ρ

Question 3

The continuity equation for incompressible flow through a pipe states that:

Accepted Answer

A₁V₁ = A₂V₂

Answer

A₁V₁² = A₂V₂²

Answer

V₁/A₁ = V₂/A₂

Answer

A₁ + V₁ = A₂ + V₂

Question 4

Which law of thermodynamics states that energy cannot be created or destroyed, only converted?

Accepted Answer

First law of thermodynamics

Answer

Second law of thermodynamics

Answer

Zeroth law of thermodynamics

Answer

Third law of thermodynamics

Question 5

What does the Reynolds number represent in fluid mechanics?

Accepted Answer

The ratio of inertial forces to viscous forces

Answer

The ratio of pressure to density

Answer

The ratio of velocity to acceleration

Answer

The ratio of kinetic to potential energy

Question 6

What is the Second Law of Thermodynamics associated with?

Accepted Answer

Entropy always increases in an isolated system

Answer

Energy cannot be converted

Answer

All processes are reversible

Answer

Heat flows from cold to hot spontaneously