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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-29

  • question_answer
    When a ring of metal is heated what happens to its hole?

    A)  expands

    B)  contracts

    C)  it-expands or contracts according to its diameter

    D)  it expands or contracts according to its coefficient of expansion

    Correct Answer: A

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