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Mechanical Engineering :: Theory of Machine

  1. Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?

  2. A.
    D-slide valve
    B.
    Governor
    C.
    Flywheel
    D.
    Meyer's expansion valve

  3. The ratio of driving tensions for rope drive is same as that of V-belt drive.

  4. A.
    Yes
    B.
    No

  5. A Hartnell governor is a

  6. A.
    dead weight governor
    B.
    pendulum type governor
    C.
    spring loaded governor
    D.
    inertia governor

  7. Frequency of vibrations is usually expressed in

  8. A.
    number of cycles per hour
    B.
    number of cycles per minute
    C.
    number of cycles per second
    D.
    none of these

  9. The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is

  10. A.
    l = 2p - 2
    B.
    l = 2p - 3
    C.
    l = 2p - 4
    D.
    l = 2p - 5

  11. The cam follower generally used in air-craft engines is

  12. A.
    knife edge follower
    B.
    flat faced follower
    C.
    spherical faced follower
    D.
    roller follower

  13. In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as

  14. A.
    tractive force
    B.
    swaying couple
    C.
    hammer blow
    D.
    none of these

  15. For low and moderate speed engines, the cam follower should move with

  16. A.
    uniform velocity
    B.
    simple harmonic motion
    C.
    uniform acceleration and retardation
    D.
    cycloidal motion

  17. If ω/ωn is very low for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

  18. A.
    B.
    90°
    C.
    180°
    D.
    360°

  19. The factional torque for square thread at the mean radius r while raising load W is given by

  20. A.
    T = W.r tan(φ - α)
    B.
    T = W.r tan(φ + α)
    C.
    T = W.r tan α
    D.
    T = W.r tan φ