FLUIDS

Which of the following is NOT an assumption made when studying fluid dynamics?

• Fluids are incompressible.

• Fluids flow perfectly smoothly (laminar flow).

• Fluids have high viscosity.

• Fluids have no viscosity.

What remains constant for an incompressible fluid flowing through a pipe, regardless of changes in the pipe's cross-sectional area?

• Fluid velocity.

• Pressure on the pipe walls.

• Mass flow rate.

• Fluid density.

If an incompressible fluid flows through a pipe that narrows, what happens to the fluid's velocity?

• It decreases.

• It increases.

• It remains the same.

• It becomes zero.

According to Bernoulli's Principle, what is the relationship between a fluid's velocity through a pipe and the pressure it exerts on the pipe's walls?

• Higher velocity leads to higher pressure.

• Higher velocity leads to lower pressure.

• Velocity and pressure are unrelated.

• Pressure increases with pipe diameter, not velocity.

What fundamental principle is Bernoulli's equation based on?

• Conservation of momentum

• Conservation of mass

• Conservation of energy

• Conservation of charge

Which of the following is NOT a form of energy density represented in Bernoulli's equation?

• Pressure

• Kinetic energy density

• Potential energy density

• Thermal energy density

When simplifying Bernoulli's equation for Torricelli's Theorem, why can the pressure terms at the top surface and the spout be cancelled out?

• The fluid is incompressible.

• The pressure at both points is equal to atmospheric pressure.

• The velocity at both points is negligible.

• The height difference is zero.

According to Torricelli's Theorem, if a spout on a rain barrel is turned to point straight up, how high will the water stream reach?

• Half the height of the water in the barrel.

• The same height as the water level at the top of the barrel.

• Twice the height of the water in the barrel.

• It will not reach any significant height due to gravity.