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Mechanical Comprehension Test Flashcards

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

Read the first 7 Mechanical Comprehension Test flashcards as text

  1. A hydraulic jack uses a small piston with area 2 in² and a large piston with area 20 in². If you apply 50 lbs of force to the small piston, what force does the large piston exert?

    Answer: 500 lbs

    Pascal's Law states force is multiplied by the ratio of areas: 50 × (20/2) = 500 lbs.

  2. A wrench handle is 12 inches long. A second wrench handle is 18 inches long. How much more torque does the longer wrench produce with the same force?

    Answer: 1.5 times more

    Torque = force × distance; 18/12 = 1.5, so the longer wrench produces 1.5 times the torque.

  3. Two gears mesh together. Gear A has 10 teeth and Gear B has 40 teeth. If Gear A spins at 200 RPM, how fast does Gear B spin?

    Answer: 50 RPM

    Gear speed is inversely proportional to tooth count: 200 × (10/40) = 50 RPM.

  4. A spring with a spring constant of 8 N/m is compressed 0.5 m. How much potential energy is stored?

    Answer: 1 J

    Elastic potential energy = ½kx² = ½ × 8 × 0.25 = 1 J.

  5. A wheel and axle system has a wheel radius of 15 cm and an axle radius of 3 cm. What is the mechanical advantage?

    Answer: 5

    Mechanical advantage of a wheel and axle = wheel radius / axle radius = 15/3 = 5.

  6. Which type of beam experiences the greatest bending stress when a load is applied at its center?

    Answer: A beam supported at both ends

    A simply supported beam with a center load experiences maximum bending moment at the center.

  7. A ball rolls down a ramp without slipping. At the bottom, its energy is divided between translational and rotational kinetic energy. Which statement is TRUE?

    Answer: A sliding block reaches the bottom faster than a rolling ball of equal mass

    A sliding frictionless block converts all potential energy to translational KE, while a rolling ball splits energy into rotational KE, making it slower.