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Mechanical Engineering :: Engineering Mechanics

  1. For a self locking machine, the efficiency must be

  2. A.

    equal to 50%

    B.

    less than 50%

    C.

    greater than 50%

    D.

    100%

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  3. The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then

  4. A.

    P = Q

    B.

    Q = R

    C.

    Q = 2R

    D.

    none of these

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  5. Onejoule is equal to

  6. A.

    0.1 N-m

    B.

    1 N-m

    C.

    10 N-m

    D.

    100 N-m

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  7. Whenever a force acts on a body and the body undergoes a displacement, then

  8. A.

    work is said to be done

    B.

    power is being transmitted

    C.

    body has kinetic energy of translation

    D.

    none of these

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  9. When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.

  10. A.

    Correct

    B.

    Incorrect

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