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Mechanical Comprehension Test Flashcards

6 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 6 Mechanical Comprehension Test flashcards as text

  1. If a lever has its fulcrum positioned 1 foot from a 100-pound load and 3 feet from the effort force, how much effort is required to lift the load?

    Answer: 33.3 pounds

    Using the lever principle (Load × Load Distance = Effort × Effort Distance): 100 × 1 = Effort × 3, so Effort = 100/3 ≈ 33.3 pounds.

  2. Two gears are meshed together. Gear A has 20 teeth and Gear B has 40 teeth. If Gear A rotates at 100 RPM, at what speed does Gear B rotate?

    Answer: 50 RPM

    When two gears mesh, the gear with more teeth rotates more slowly. Speed ratio = Teeth of A / Teeth of B = 20/40 = 1/2. So Gear B rotates at 100 × (1/2) = 50 RPM.

  3. A pulley system uses 4 supporting rope segments to lift a load. If the load weighs 200 pounds, how much effort force is required (ignoring friction)?

    Answer: 50 pounds

    In a pulley system, the mechanical advantage equals the number of supporting rope segments. With 4 segments supporting the load, the effort required = 200 ÷ 4 = 50 pounds.

  4. Water pressure at the bottom of a container depends on which of the following?

    Answer: The depth of the water

    Fluid pressure depends only on the depth of the fluid and its density, not on the container's shape or total volume. Pressure increases with depth according to P = ρgh.

  5. A bolt has 16 threads per inch. If you turn it 4 complete revolutions, how far does it advance?

    Answer: 0.25 inches

    The pitch of the bolt is 1/16 inch per revolution. Over 4 revolutions: 4 × (1/16) = 4/16 = 0.25 inches advance.

  6. Which simple machine is a wedge most similar to in terms of mechanical principle?

    Answer: Inclined plane

    A wedge is essentially a portable inclined plane that converts a forward force into a splitting or lifting force perpendicular to the wedge's motion, using the same mechanical principles as an inclined plane.