NAPT Fluid Mechanics and Hydraulics

Question 1

Pascal's Law states that pressure applied to a confined fluid is transmitted:

Accepted Answer

Equally in all directions throughout the fluid

Answer

Pascal's Law states that pressure applied to a confined, incompressible fluid is transmitted equally and undiminished in all directions throughout the fluid.

Question 2

According to Bernoulli's principle, as the velocity of a fluid increases, its pressure:

Accepted Answer

Decreases

Answer

Bernoulli's principle states that in a flowing fluid, an increase in velocity corresponds to a decrease in static pressure, reflecting conservation of energy.

Question 3

The gauge pressure at the bottom of a column of water 10 meters deep (density = 1000 kg/m³, g = 9.8 m/s²) is approximately:

Accepted Answer

98,000 Pa

Answer

Gauge pressure P = ρgh = 1000 × 9.8 × 10 = 98,000 Pa; gauge pressure measures pressure above atmospheric.

Question 4

Archimedes' principle states that the buoyant force on a submerged object equals:

Accepted Answer

The weight of the fluid displaced by the object

Answer

Archimedes' principle states that the buoyant force equals the weight of the fluid displaced by the object, which is why objects float when this force equals their own weight.

Question 5

The continuity equation for incompressible fluid flow states that:

Accepted Answer

The product of cross-sectional area and flow velocity is constant

Answer

The continuity equation (A₁V₁ = A₂V₂) requires that the volume flow rate is conserved, so a smaller cross-section forces the fluid to move faster.

NAPT - Navy Advanced Programs Test Practice Test

NAPT - Navy Advanced Programs Test Practice Test

NAPT Fluid Mechanics and Hydraulics