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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

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  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

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

  6. A.
    Right
    B.
    Wrong

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

  8. A.
    True
    B.
    False

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  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

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

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

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

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

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  15. The partial balancing means

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

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

  18. 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

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  19. The coriolis component of acceleration depends upon

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

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