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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 2
36.
The primary unbalanced force is maximum __________ in one revolution of the crank.
twice
four times
eight times
sixteen times
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
The instantaneous centres which vary with the configuration of mechanism, are called
permanent instantaneous centres
fixed instantaneous centres
neither fixed nor permanent instantaneous centres
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
The displacement of the reciprocating roller follower, when it has contact with the straight flanks of the tangent cam, is given by (where r1 = Minimum radius of the cam, r2 = Radius of the roller follower, and θ = Angle turned by the cam from the beginning of the follower displacement)
(r1 - r2)(1 - cosθ)
(r1 + r2)(1 + cos θ)
(r1 - r2)
(r1 + r2)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
In considering friction of a V-thread, the virtual coefficient of friction (μ1) is given by
μ1 = μ sin β
μ1 = μ cos β
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The wear of bearing is proportional to velocity and pressure.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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