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 of the following is the correct expression for the efficiency of a Carnot heat engine operating between a hot reservoir at T_H and a cold reservoir at T_C (temperatures in Kelvin)?
Answer: η = 1 − T_C / T_H
Carnot efficiency is η = 1 − T_C/T_H, where temperatures must be in absolute (Kelvin) units.
A steel rod 2 m long with cross-sectional area 0.001 m² is subjected to a tensile force of 100 kN. If E = 200 GPa, what is the elongation?
Answer: 1.0 mm
δ = FL/(AE) = 100,000×2/(0.001×200×10⁹) = 200,000/200,000,000 = 0.001 m = 1.0 mm.
In digital logic, what is the output of a 3-input AND gate when inputs are A=1, B=0, C=1?
Answer: 0
An AND gate outputs 1 only when ALL inputs are 1; since B=0, the output is 0.
Which law states that the pressure of a fixed amount of gas is inversely proportional to its volume at constant temperature?
Answer: Boyle's Law
Boyle's Law states P ∝ 1/V at constant temperature: P₁V₁ = P₂V₂.
A projectile is launched horizontally from a height of 20 m. Ignoring air resistance and using g = 10 m/s², how long does it take to reach the ground?
Answer: 2 s
h = ½gt² → 20 = ½×10×t² → t² = 4 → t = 2 s.
In chemical engineering, what does the term 'steady-state' mean for a process?
Answer: System properties do not change with time
Steady-state means all system properties (temperature, pressure, composition) remain constant over time, though flows may be nonzero.
What is the determinant of the 2×2 matrix [[3, 5], [2, 4]]?
Answer: 2
det = (3×4) − (5×2) = 12 − 10 = 2.