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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.

Read the first 7 Technical Aptitude flashcards as text

  1. A gear with 40 teeth meshes with a gear with 10 teeth. If the smaller gear rotates at 200 RPM, what is the RPM of the larger gear?

    Answer: 50 RPM

    Gear ratio = 10/40 = 1/4, so the larger gear rotates at 200 × (10/40) = 50 RPM.

  2. Which material has the highest electrical conductivity at room temperature?

    Answer: Silver

    Silver has the highest electrical conductivity of any element, though copper is more commonly used due to cost.

  3. In a hydraulic system, if the input piston has an area of 2 cm² and the output piston has an area of 20 cm², and a force of 100 N is applied to the input, what is the output force?

    Answer: 1000 N

    Pascal's principle: Output force = Input force × (Output area / Input area) = 100 × (20/2) = 1000 N.

  4. A program uses a stack data structure. Items are pushed in order: A, B, C. What is the order they are popped?

    Answer: C, B, A

    A stack follows LIFO (Last In, First Out), so C is popped first, then B, then A.

  5. What does the acronym API stand for in software development?

    Answer: Application Programming Interface

    API stands for Application Programming Interface, a set of rules allowing software components to communicate.

  6. A transformer has 200 primary turns and 50 secondary turns. If the primary voltage is 240V, what is the secondary voltage?

    Answer: 60 V

    Turns ratio = 50/200 = 1/4, so secondary voltage = 240 × (50/200) = 60 V.

  7. Which type of lever has the fulcrum positioned between the effort and the load?

    Answer: First-class lever

    A first-class lever has the fulcrum between effort and load, like a seesaw or crowbar.