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Mechanical Engineering :: Theory of Machine

  1. The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the

  2. A.
    pitch circle
    B.
    base circle
    C.
    pitch curve
    D.
    prime circle

  3. A pair of friction discs is an example of rolling pair.

  4. A.
    True
    B.
    False

  5. In order to balance the reciprocating masses,

  6. A.
    primary forces and couples must be balanced
    B.
    secondary forces and couples must be balanced
    C.
    both (a) and (b)
    D.
    none of these

  7. In a screw jack, the effort required to lower the load W is given by

  8. A.
    P = W tan(α - φ)
    B.
    P = W tan(α + φ)
    C.
    P = W tan(φ - α)
    D.
    P = W cos(α + φ)

  9. An automobile steering gear is an example of

  10. A.
    sliding pair
    B.
    rolling pair
    C.
    lower pair
    D.
    higher pair

  11. The frictional torque transmitted in a multi-collared shaft is same as that of a single collared shaft.

  12. A.
    Right
    B.
    Wrong

  13. In order to give the primary balance of the reciprocating parts of a multi-cylinder in-line engines,

  14. A.
    the algebraic sum of the primary forces must be equal to zero
    B.
    the algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero
    C.
    both (a) and (b)
    D.
    none of these

  15. The gear train usually employed in clocks is a

  16. A.
    simple gear train
    B.
    reverted gear train
    C.
    sun and planet gear
    D.
    differential gear

  17. A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

  18. A.
    1.4 N-s/m
    B.
    18.52 N-s/m
    C.
    52.92 N-s/m
    D.
    529.2 N-s/m

  19. The cam follower generally used in automobile engines is

  20. A.
    knife edge follower
    B.
    fiat faced follower
    C.
    spherical faced follower
    D.
    roller follower