Bachelor of Engineering Science Flashcards

Which law states that the pressure at any point in a static fluid depends only on the depth of that point?

Answer: Pascal's law

Pascal's law states pressure applied to an enclosed fluid is transmitted equally in all directions, and static pressure depends only on fluid depth (P = ρgh).

In a simply supported beam with a central point load P and span L, the maximum bending moment is:

Answer: PL/4

For a simply supported beam with central point load, maximum bending moment occurs at midspan: M_max = PL/4.

What does the Laplace transform of a unit impulse function δ(t) equal?

Answer: 1

The Laplace transform of the Dirac delta function δ(t) is 1, making it useful as a test input in control system analysis.

Which heat transfer mode does NOT require a medium for energy transmission?

Answer: Radiation

Radiation transfers energy via electromagnetic waves and can propagate through a vacuum, unlike conduction and convection which require matter.

In a DC circuit, three resistors of 6 Ω, 3 Ω, and 2 Ω are connected in parallel. What is the equivalent resistance?

Answer: 1 Ω

1/R_eq = 1/6 + 1/3 + 1/2 = 1/6 + 2/6 + 3/6 = 6/6 = 1, so R_eq = 1 Ω.

Which manufacturing process joins two metal surfaces by heating them to below their melting points and applying pressure?

Answer: Solid-state welding

Solid-state welding (e.g., friction welding, diffusion bonding) joins metals below their melting points through heat, pressure, or both without forming a liquid phase.

In probability and statistics, which distribution is most appropriate for modeling the number of defects per unit area in a manufacturing process?

Answer: Poisson distribution

The Poisson distribution models the count of rare, independent events occurring over a fixed interval of time or space, such as defects per unit area.