Which of the following is **not** a form of energy in a moving liquid?
Analysis & Theory
Kinetic, potential, and pressure energy are common in fluid motion; nuclear energy is not involved.
What is the formula for **kinetic energy per unit weight** of a flowing liquid?
Analysis & Theory
Kinetic energy per unit weight is v²/2g, where v is velocity and g is gravity.
Which form of energy is due to the **height of liquid** above a reference point?
Analysis & Theory
Potential energy depends on the height of the fluid and is given by z (in meters).
What is **pressure energy** in a fluid?
A
Energy due to temperature
B
Energy due to pressure exerted by fluid
Analysis & Theory
Pressure energy is the energy stored in a fluid due to its pressure.
What is the unit of all three energies (kinetic, potential, pressure) when expressed per unit weight?
Analysis & Theory
When energy is expressed per unit weight, its unit is meters (head).
Which of the following represents the **total head** in fluid flow?
Analysis & Theory
Total head = pressure head + velocity head + elevation head = (p/ρg) + (v²/2g) + z.
What is **Bernoulli’s equation** based on?
B
Conservation of momentum
Analysis & Theory
Bernoulli's equation is based on conservation of energy in fluid flow.
In Bernoulli's equation, which form of energy increases when a fluid speeds up?
Analysis & Theory
As velocity increases, kinetic energy increases (v²/2g).
In horizontal flow, when velocity increases, what generally happens to pressure?
Analysis & Theory
According to Bernoulli’s principle, when velocity increases, pressure decreases (in horizontal flow).
Which energy is **lost due to friction** in real fluid flow?
Analysis & Theory
Friction causes head loss (loss of total energy) in real fluids.