Fundamentals of Engineering Fundamentals of Engineering MCQ 4

Question 1

Which failure theory is most appropriate for predicting the yielding of ductile materials under multiaxial stress?

Accepted Answer

Von Mises (Distortion Energy) Theory

Answer

The Von Mises criterion is the most accurate predictor of yielding in ductile metals under multiaxial loading.

Question 2

In an op-amp inverting amplifier configuration, the closed-loop voltage gain is determined by which formula?

Accepted Answer

A_v = −R_f / R_in

Answer

The inverting amplifier gain is A_v = −R_f/R_in; the negative sign indicates a 180° phase inversion.

Question 3

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?

Accepted Answer

Velocity quadruples

Answer

A₁V₁ = A₂V₂; area ∝ D², so halving D reduces area by 4×, requiring velocity to increase 4×.

Question 4

What is the Laplace transform of the function f(t) = e^(−at)?

Accepted Answer

1/(s+a)

Answer

L{e^(−at)} = 1/(s+a) for s > −a, a standard transform pair.

Question 5

Which of the following best describes the purpose of a factor of safety (FOS) in engineering design?

Accepted Answer

To account for uncertainties in loads, materials, and analysis

Answer

The factor of safety provides a margin against uncertainties in material properties, loading, and analytical assumptions.

Fundamentals of Engineering Practice Test

Fundamentals of Engineering Practice Test

Fundamentals of Engineering Fundamentals of Engineering MCQ 4