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

Only upward through the fluid

Answer

Only to the nearest surface

Answer

Proportional to the fluid's viscosity

Question 2

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

Accepted Answer

Decreases

Answer

Increases proportionally

Answer

Remains constant

Answer

Doubles

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

9,800 Pa

Answer

980 Pa

Answer

0 Pa

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

The weight of the object

Answer

The volume of the object times gravity

Answer

The surface area of the object times fluid pressure

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

Pressure times velocity is constant

Answer

Density times temperature is constant

Answer

Volume flow rate increases with pipe diameter

Question 6

Viscosity in a fluid is a measure of its:

Accepted Answer

Resistance to flow or internal friction

Answer

Density relative to water

Answer

Ability to compress under pressure

Answer

Surface tension at an interface

Question 7

In a hydraulic lift system, a small piston with area 0.01 m² has a force of 100 N applied. What force is exerted by a large piston with area 0.5 m²?

Accepted Answer

5,000 N

Answer

2 N

Answer

100 N

Answer

500 N