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Aptitude Test Mechanical Reasoning Principles Questions and Answers Flashcards

6 cards from real IBEW practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Aptitude Test Mechanical Reasoning Principles Questions and Answers flashcards as text

  1. A ramp is 10 feet long and rises 2 feet. What is the mechanical advantage of this inclined plane?

    Answer: 5

    MA = length of ramp / height = 10 / 2 = 5.

  2. Which would be HARDER to turn with the same force: a small-diameter valve wheel or a large-diameter valve wheel?

    Answer: The small wheel, because it has less mechanical advantage

    A larger wheel provides more torque (moment arm × force), so a smaller wheel is harder to turn with the same applied force.

  3. Two belts connect three pulleys in series. Pulley A (diameter 4 in) drives Pulley B (diameter 8 in), which drives Pulley C (diameter 4 in). If A turns at 200 RPM, what speed does C turn?

    Answer: 200 RPM

    A→B: B = 200 × 4/8 = 100 RPM. B→C: C = 100 × 8/4 = 200 RPM.

  4. What type of motion does a crank mechanism convert?

    Answer: Rotary to linear (and vice versa)

    A crank converts rotary (circular) motion to linear (back-and-forth) motion, and vice versa.

  5. If a spring with spring constant k = 50 N/m is compressed 0.4 m, what force does it exert?

    Answer: 20 N

    F = k × x = 50 × 0.4 = 20 N.

  6. Which statement about friction is correct?

    Answer: Friction is useful in braking but harmful in bearings

    Friction is useful in brakes, belts, and grip applications but wastes energy in rotating bearings, reducing efficiency.