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Mechanical Engineering :: Theory of Machine

Theory of Machine - Section 1
Theory of Machine - Section 2
Theory of Machine - Section 3
Theory of Machine - Section 4
Theory of Machine - Section 5
Theory of Machine - Section 6
Theory of Machine - Section 7
Theory of Machine - Section 8
Theory of Machine - Section 9
Theory of Machine - Section 10
Theory of Machine - section-11

  1. A system in dynamic balance implies that

    2. A.
    the system is critically damped
    B.
    there is no critical speed in the system
    C.
    the system is also statically balanced
    D.
    there will absolutely no wear of bearings

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  2. The example of completely constrained motion is a

    3. A.
    motion of a piston in the cylinder of a steam engine
    B.
    motion of a square bar in a square hole
    C.
    motion of a shaft with collars at each end in a circular hole
    D.
    all of the above

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  3. In involute gears, the pressure angle is

    4. A.
    dependent on the size of teeth
    B.
    dependent on the size of gears
    C.
    always constant
    D.
    always variable

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  4. A shaft carrying three rotors will have

    5. A.
    no node
    B.
    one node
    C.
    two nodes
    D.
    three nodes

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  5. The minimum force required to slide a body of weight W on a rough horizontal plane is

    6. A.
    W sin θ
    B.
    W cos θ
    C.
    W tan θ
    D.
    W cosec θ

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  6. In a mechanism, the fixed instantaneous centres are those centres which

    7. A.
    remain in the same place for all configurations of the mechanism
    B.
    vary with the configuration of the mechanism
    C.
    moves as the mechanism moves, but joints are of permanent nature
    D.
    none of the above

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  7. Which of the following statements regarding laws governing the friction between dry surfaces are correct?

    8. A.
    The friction force is dependent on the materials of the contact surfaces.
    B.
    The friction force is directly proportional to the normal force.
    C.
    The friction force is independent of me area of contact.
    D.
    all of the above

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  8. The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is

    9. A.
    μ W R cosec α
    B.
    μ W R cosec α
    C.
    μ W R cosec α
    D.
    μ W R cosec α

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  9. A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a

    10. A.
    structure
    B.
    mechanism
    C.
    kinematic chain
    D.
    inversion

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  10. A link or element need not to be a rigid body, but it must be a resistant body.

    11. A.
    Agree
    B.
    Disagree

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