Theory of Machines MCQ Practice Test - Set 37

Practice Test: Question Set - 37


1. The transmissibility, for all values of damping factor, will be less than unity, if ω/ωn is
    (A) Equal to 1
    (B) Less than 2
    (C) Equal to 2
    (D) Greater than 2

2. In a pantograph, all the pairs are
    (A) Turning pairs
    (B) Sliding pairs
    (C) Spherical pairs
    (D) Self-closed pairs

3. The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)
    (A) ω² × OQ
    (B) ω² × OQ sinθ
    (C) ω² × OQ cosθ
    (D) ω² × OQ tanθ

4. The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by
    (A) ω². (r₁ r₂). (1 - cos² θ)
    (B) ω². (r₁ + r₂). (1 + cos² θ)
    (C) ω². (r₁ + r₂). [(2 - cos² θ)/cos³ θ]
    (D) ω². (r₁ - r₂). (1 - sin² θ)

5. In a steam engine, the link constitutes a
    (A) Piston, piston rod and cross-head
    (B) Connecting rod with big and small end brasses, caps and bolts
    (C) Crank pin, crankshaft and flywheel
    (D) All of the above

6. When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be
    (A) Minimum
    (B) Zero
    (C) Maximum
    (D) None of these

7. The swaying couple is due to the
    (A) Primary unbalanced force
    (B) Secondary unbalanced force
    (C) Two cylinders of locomotive
    (D) Partial balancing

8. The relation between number of links (l) and number of joints (j) in a kinematic chain is
    (A) l = (1/2).(j + 2)
    (B) l = (2/3).(j + 2)
    (C) l = (3/4).(j + 3)
    (D) l = j + 4

9. The contact ratio for gears is
    (A) Zero
    (B) Less than one
    (C) Greater than one
    (D) Infinity

10. The gear train usually employed in clocks is a
    (A) Simple gear train
    (B) Reverted gear train
    (C) Sun and planet gear
    (D) Differential gear

11. A Porter governor is a
    (A) Pendulum type governor
    (B) Dead weight governor
    (C) Spring loaded governor
    (D) Inertia governor

12. The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)
    (A) (1/2) μ W R cosecα
    (B) (2/3) μ W R cosecα
    (C) (3/4) μ W R cosecα
    (D) μ W R cosecα

13. An automobile steering gear is an example of
    (A) Sliding pair
    (B) Rolling pair
    (C) Lower pair
    (D) Higher pair

14. When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a
    (A) Lower pair
    (B) Higher pair
    (C) Self-closed pair
    (D) Force-closed pair

15. The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.
    (A) More than
    (B) Less than
    (C) Same as
    (D) None of these

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Theory of Machines:
  Set 01      Set 02      Set 03      Set 04      Set 05      Set 06      Set 07      Set 08      Set 09
  Set 10      Set 11      Set 12      Set 13      Set 14      Set 15      Set 16      Set 17      Set 18
  Set 19      Set 20      Set 21      Set 22      Set 23      Set 24      Set 25      Set 26      Set 27
  Set 28      Set 29      Set 30      Set 31      Set 32      Set 33      Set 34      Set 35      Set 36
  Set 37      Set 38
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