Fundamentals of Engineering MCQ Flashcards
7 cards from real Fundamentals of Engineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Fundamentals of Engineering MCQ flashcards as text
Which failure theory is most appropriate for predicting the yielding of ductile materials under multiaxial stress?
Answer: Von Mises (Distortion Energy) Theory
The Von Mises criterion is the most accurate predictor of yielding in ductile metals under multiaxial loading.
In an op-amp inverting amplifier configuration, the closed-loop voltage gain is determined by which formula?
Answer: A_v = −R_f / R_in
The inverting amplifier gain is A_v = −R_f/R_in; the negative sign indicates a 180° phase inversion.
A fluid flows through a horizontal pipe that narrows from diameter D₁ to D₂. According to the continuity equation, if D₂ = D₁/2, how does the velocity change?
Answer: Velocity quadruples
A₁V₁ = A₂V₂; area ∝ D², so halving D reduces area by 4×, requiring velocity to increase 4×.
What is the Laplace transform of the function f(t) = e^(−at)?
Answer: 1/(s+a)
L{e^(−at)} = 1/(s+a) for s > −a, a standard transform pair.
Which of the following best describes the purpose of a factor of safety (FOS) in engineering design?
Answer: To account for uncertainties in loads, materials, and analysis
The factor of safety provides a margin against uncertainties in material properties, loading, and analytical assumptions.
In environmental engineering, BOD (Biochemical Oxygen Demand) is a measure of:
Answer: The amount of oxygen required by bacteria to decompose organic matter
BOD quantifies the oxygen consumed by microorganisms when breaking down organic material in water, indicating pollution level.
If the Fourier series of a function contains only sine terms (no cosine or constant terms), what symmetry does the function have?
Answer: Odd symmetry
A function with odd symmetry [f(−t) = −f(t)] has a Fourier series consisting exclusively of sine terms.