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Technical Aptitude Flashcards

7 cards from real Mettl 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. Water flows through a pipe at 4 m/s with a diameter of 0.1 m. The pipe narrows to a diameter of 0.05 m. What is the flow velocity in the narrower section?

    Answer: 16 m/s

    By the continuity equation, A₁v₁ = A₂v₂; area ratio = (0.1)²/(0.05)² = 4, so v₂ = 4 × 4 = 16 m/s.

  2. In binary, what is the decimal value of 1101?

    Answer: 13

    1101 in binary = 1×8 + 1×4 + 0×2 + 1×1 = 8 + 4 + 0 + 1 = 13.

  3. Which type of circuit allows current to flow in only one direction?

    Answer: Rectifier circuit

    A rectifier circuit converts AC to DC, allowing current to flow in only one direction using diodes.

  4. A 10 kg object is on a frictionless surface. A 50 N force is applied. What is the object's acceleration?

    Answer: 5 m/s²

    Newton's second law: a = F/m = 50 N / 10 kg = 5 m/s².

  5. What is the purpose of a heat sink in electronic devices?

    Answer: Dissipate heat away from components

    A heat sink absorbs and dissipates heat generated by electronic components to prevent overheating.

  6. A pulley system has a mechanical advantage of 4. How much effort is needed to lift a 200 N load?

    Answer: 50 N

    Mechanical advantage = Load / Effort, so Effort = Load / MA = 200 / 4 = 50 N.

  7. What does RAM stand for in computer hardware?

    Answer: Random Access Memory

    RAM stands for Random Access Memory, the volatile memory used for active data and running programs.