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Mechanical Engineering :: Theory of Machine

  1. The uniform pressure theory gives a higher frictional torque than the uniform wear theory.

  2. A.
    Agree
    B.
    Disagree

  3. The centrifugal tension on the belt has no effect on the power transmitted.

  4. A.
    Correct
    B.
    Incorrect

  5. The train value of a gear train is

  6. A.
    equal to velocity ratio of a gear train
    B.
    reciprocal of velocity ratio of a gear train
    C.
    always greater than unity
    D.
    always less than unity

  7. In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral C Q NO. The acceleration of the piston P with respect to the crankpin C is given by

  8. A.
    ω2 x NO
    B.
    ω2 x CO
    C.
    ω2 x CN
    D.
    ω2 x QN

  9. The driving and driven shafts connected by a Hooke's joint will have equal speeds, if

  10. A.
    cos θ = sin α
    B.
    sin θ = ±tan α
    C.
    tan θ = ±cos α
    D.
    cot θ = cos α

  11. The product of the diametral pitch and circular pitch is equal to

  12. A.
    1
    B.
    1/π
    C.
    π
    D.
    2 π

  13. The coriolis component of acceleration is taken into account for

  14. A.
    slider crank mechanism
    B.
    four bar chain mechanism
    C.
    quick return motion mechanism
    D.
    all of these

  15. The flank of the tooth is the surface of the tooth __________ the pitch surface.

  16. A.
    above
    B.
    below

  17. The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r1 and r2 = External and internal radii of collar respectively)

  18. A.
    μ W (r1 + r2)
    B.
    μ W (r1 + r2)
    C.
    D.

  19. The inertia force is equal to the accelerating force in magnitude, but opposite in direction.

  20. A.
    Right
    B.
    Wrong