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Fundamentals of Engineering Flashcards

7 cards from real EI 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 flashcards as text

  1. A steel rod (E = 200 GPa) with cross-sectional area 500 mm² is subjected to a tensile load of 100 kN. What is the axial stress?

    Answer: 200 MPa

    σ = F/A = 100,000 N / (500 × 10⁻⁶ m²) = 200 MPa.

  2. Which property of a vector field indicates that its line integral around any closed loop is zero?

    Answer: Irrotational (conservative)

    A conservative (irrotational) vector field has zero curl and its closed-loop line integral is always zero.

  3. In a series RLC circuit at resonance, the impedance is:

    Answer: Equal to R only

    At resonance, inductive and capacitive reactances cancel, so impedance Z = R.

  4. The specific heat ratio (γ = cp/cv) for air is approximately:

    Answer: 1.4

    For air (diatomic ideal gas), the specific heat ratio γ = cp/cv ≈ 1.4.

  5. Mohr's Circle is used to determine:

    Answer: Principal stresses and maximum shear stress

    Mohr's Circle graphically represents the state of stress and allows determination of principal stresses and max shear stress.

  6. The Taylor series expansion of e^x about x = 0 is:

    Answer: 1 + x + x²/2! + x³/3! + ...

    The Maclaurin series for e^x is the sum from n=0 to ∞ of xⁿ/n! = 1 + x + x²/2! + x³/3! + ...

  7. A 200 L tank contains an ideal gas at 300 K and 150 kPa. If the temperature is raised to 450 K at constant volume, what is the new pressure?

    Answer: 225 kPa

    At constant volume, P/T = constant: P₂ = 150 × (450/300) = 225 kPa.