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Mechanical Engineering :: Theory of Machine

  1. When the particles of a body moves perpendicular to its axis, then the body is said to have

  2. A.
    longitudinal vibration
    B.
    transverse vibration
    C.
    torsional vibration
    D.
    none of these

  3. A sliding pair has a completely constrained motion.

  4. A.
    Yes
    B.
    No

  5. Power of a governor is the

  6. 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

  7. The power from the engine to the rear axle of an automobile is transmitted by means of

  8. A.
    worm and worm wheel
    B.
    spur gears
    C.
    bevel gears
    D.
    Hooke's joint

  9. A flywheel is used to control the mean speed of an engine caused by the variations in load.

  10. A.
    Correct
    B.
    Incorrect

  11. A slider moves at a velocity v on a link revolving at ω rad/s. The coriolis component of acceleration is

  12. A.
    ωv
    B.
    2 ωv
    C.
    ω2v
    D.
    2 ωv2

  13. The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)

  14. A.
    c(m - M)g
    B.
    c(m + M)g
    C.
    D.

  15. In a reciprocating steam engine, which of the following forms a kinematic link?

  16. A.
    Cylinder and piston
    B.
    Piston rod and connecting rod
    C.
    Crankshaft and flywheel
    D.
    Flywheel and engine frame

  17. The maximum velocity of a particle moving with simple harmonic motion is

  18. A.
    ω
    B.
    ωr
    C.
    ω2r
    D.
    ω/r

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

  20. A.
    μ W cosec α (r1 + r2)
    B.
    μ W cosec α (r1 + r2)
    C.
    μ W cosec α
    D.
    μ W cosec α