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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 8
6.
A system of masses rotating in different parallel planes is in dynamic balance if the
resultance force is equal to zero
resultant couple is equal to zero
resultant force and resultant couple are both equal to zero
resultant force is numerically equal to the resultant couple, but neither of them need necessarily be zero
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
The velocity of sliding __________ the distance of the point of contact from the pitch point.
is directly proportional to
is inversely proportional to
is equal to cos φ multiplied by
does not depend upon
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called
dedendum
addendum
clearance
working depth
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become
fn/2
2 fn
4 fn
8 fn
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
The frictional torque transmitted in a truncated conical pivot bearing, considering uniform pressure, is
μ W cosec α (r1 + r2)
μ W cosec α (r1 + r2)
μ W cosec α
μ W cosec α
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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