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Mechanical Engineering :: Theory of Machine

  1. In a disc clutch, if there are n1 number of discs on the driving shaft and n2 number of discs on the driven shaft, then the number of pairs of contact surfaces will be

  2. A.
    n1 + n2
    B.
    n1 + n2 + 1
    C.
    n1 + n2 - 1
    D.
    n1 + n2 - 2

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  3. The power of a Porter governor is equal to

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  5. The effect of swaying couple in a locomotive is resisted by the side pressure between the flanges of the tyres of the wheel and the inside of the rails.

  6. A.
    Agree
    B.
    Disagree

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  7. The Klein's diagram is useful to find

  8. A.
    displacement of various parts
    B.
    velocity of various parts
    C.
    acceleration of various parts
    D.
    angular acceleration of various parts

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  9. The equation of motion for a single degree of freedom system with viscous damping is . The damping ratio of the system is

  10. A.
    9/8
    B.
    9/82
    C.
    9/16
    D.
    9/128

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  11. The ratio of the number of teeth to the pitch circle diameter in millimetres, is called

  12. A.
    circular pitch
    B.
    diametral pitch
    C.
    module
    D.
    none of these

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  13. The ratio of the pitch circle diameter in millimetres to the number of teeth, is called circular pitch.

  14. A.
    Yes
    B.
    No

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  15. The rotating shafts tend to vibrate violently at whirling speeds because

  16. A.
    the system is unbalanced
    B.
    bearing centre line coincides with the axis
    C.
    the shafts are rotating at very high speeds
    D.
    resonance is caused due to the heavy mass of the rotor

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  17. Which of the following is an inversion of a double slider crank chain?

  18. A.
    Oldham's coupling
    B.
    Elliptical trammel
    C.
    Scotch yoke mechanism
    D.
    all of these

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  19. The unbalanced force due to revolving masses

  20. A.
    varies in magnitude but constant in direction
    B.
    varies in direction but constant in magnitude
    C.
    varies in magnitude and direction both
    D.
    constant in magnitude and direction both

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