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Mechanical Engineering :: Theory of Machine

  1. V-belts are usually used for

  2. A.
    long drives
    B.
    short drives
    C.
    long and short drives
    D.
    none of these

  3. Sensitiveness of the governor is defined as the ratio of the

  4. A.
    mean speed to the maximum equilibrium speed
    B.
    mean speed to the minimum equilibrium speed
    C.
    difference of the maximum and minimum equilibrium speeds to the mean speed
    D.
    sum of the maximum and minimum equilibrium speeds to the mean speed

  5. The two parallel and coplaner shafts are connected by gears having teeth parallel to the axis of the shaft. This arrangement is known as

  6. A.
    spur gearing
    B.
    helical gearing
    C.
    bevel gearing
    D.
    spiral gearing

  7. The relative velocity of B with respect to A in a rigid link AB is

  8. A.
    parallel to AB
    B.
    perpendicular to AB
    C.
    along AB
    D.
    at 45° to AB

  9. In a pantograph, all the pairs are

  10. A.
    turning pairs
    B.
    sliding pairs
    C.
    spherical pairs
    D.
    self-closed pairs

  11. The velocity of a body moving with simple harmonic motion is __________ at the mean position.

  12. A.
    zero
    B.
    minimum
    C.
    maximum

  13. A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2 L apart from the left bearing. At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will

  14. A.
    remain same as before
    B.
    become equal to 2 R
    C.
    become equal to R/2
    D.
    become equal to R/4

  15. If the pressure angle is __________ , a reciprocating follower will jam in its bearings.

  16. A.
    too small
    B.
    too large

  17. The D-slide valve is also known as

  18. A.
    inside admission valve
    B.
    outside admission valve
    C.
    piston slide valve
    D.
    none of these

  19. When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

  20. A.
    D-slide valve
    B.
    governor
    C.
    Meyer's expansion valve
    D.
    flywheel