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FCTC Mechanical Reasoning Principles Questions and Answers Flashcards

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

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

  1. A spring stretches 3 inches when a 6-lb weight is hung from it. How far will it stretch with a 9-lb weight, assuming elastic behavior?

    Answer: 4.5 inches

    By Hooke's Law, stretch is proportional to force: (9/6) × 3 = 4.5 inches.

  2. Two pulleys are connected by a belt. Pulley A has a 6-inch radius and Pulley B has a 2-inch radius. If Pulley A turns at 30 RPM, how fast does Pulley B turn?

    Answer: 90 RPM

    Belt speed is constant, so speed ratio is inverse of radius ratio: 30 × (6/2) = 90 RPM.

  3. A wedge is driven under a load. As the wedge angle decreases (becomes thinner), what happens to the mechanical advantage?

    Answer: It increases

    A thinner wedge requires less force to drive but travels farther, increasing mechanical advantage.

  4. Which factor does NOT affect the amount of work done on an object?

    Answer: The color of the object

    Work equals force times distance in the direction of motion; the object's color is irrelevant.

  5. A hydraulic jack has an input piston with area 2 sq in and an output piston with area 20 sq in. If you apply 10 lb of force to the input, what force is produced at the output?

    Answer: 100 lb

    Pascal's principle: pressure is equal throughout, so force scales with area: 10 × (20/2) = 100 lb.

  6. When two gears of different sizes are meshed, which gear has greater torque?

    Answer: The larger gear

    The larger gear has more torque because torque is inversely proportional to rotational speed in a gear pair.