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Mechanical Engineering :: Theory of Machine

  1. If the number of links in a mechanism are equal to l, then the number of possible inversions are equal to

  2. A.
    l - 2
    B.
    l - 1
    C.
    l
    D.
    l + 1

  3. Effort of a governor is the

  4. A.
    mean force exerted at the sleeve for a given percentage change of speed
    B.
    workdone at the sleeve for maximum equilibrium speed
    C.
    mean force exerted at the sleeve for maximum equilibrium speed
    D.
    none of the above

  5. The pressure angle for involute gears depends upon the size of teeth.

  6. A.
    Right
    B.
    Wrong

  7. The maximum displacement of a body, from its mean position is called amplitude.

  8. A.
    True
    B.
    False

  9. In a reciprocating steam engine, when the crank has turned from inner dead centre through an angle θ, the angular velocity of the connecting rod is given by


  10. The total number of instantaneous centres for a mechanism consisting of n links are

  11. A.
    n/2
    B.
    n
    C.
    n - 1
    D.
    n(n - 1)/2

  12. The acceleration of a particle moving with simple harmonic motion, at any instant is given by

  13. A.
    ωx
    B.
    ω2x
    C.
    ω2/x
    D.
    ω3/x

  14. The partial balancing means

  15. A.
    balancing partially revolving masses
    B.
    balancing partially reciprocating masses
    C.
    best balancing of engines
    D.
    all of these

  16. Which of the following statement is correct as regard to the difference between a machine and a structure?

  17. A.
    The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
    B.
    The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
    C.
    A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work
    D.
    all of the above

  18. The coriolis component of acceleration depends upon

  19. A.
    velocity of slider
    B.
    angular velocity of the link
    C.
    both (a) and (b)
    D.
    none of these