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Psychometric Test Mechanical Reasoning Flashcards

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

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  1. 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

    Gear speed is inversely proportional to tooth count: B spins at 20/40 × 100 = 50 RPM.

  2. A lever has a fulcrum in the middle. A 10 kg weight is placed 2 m to the left. To balance it, a 5 kg weight must be placed how far to the right?

    Answer: 4 m

    Torque balance: 10 kg × 2 m = 5 kg × d, so d = 4 m.

  3. Water flows through a pipe that narrows from a 4 cm diameter to a 2 cm diameter. What happens to the water's flow speed?

    Answer: It quadruples

    The cross-sectional area decreases by a factor of 4 (radius halved), so by continuity, speed quadruples.

  4. A ball is thrown horizontally from a cliff. Ignoring air resistance, which force acts on the ball during flight?

    Answer: Only gravity

    After release, only gravity acts on the ball; there is no horizontal force to maintain (Newton's first law).

  5. A pulley system has one fixed and one movable pulley. Approximately how much effort is needed to lift a 100 kg load?

    Answer: 50 kg

    A single movable pulley gives a mechanical advantage of 2, halving the required effort to about 50 kg.

  6. Which type of simple machine is a doorknob?

    Answer: Wheel and axle

    A doorknob is a wheel and axle — the large knob is the wheel and the spindle is the axle.