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Theory of Machine

Theory of Machine
Which of the following is an open pair?

Cam and follower
Ball and socket joint
Lead screw and nut
Journal bearing

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Theory of Machine
A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

m₁ r₂ = m₂ r₁
None of these
m₁ r₁ = m₂ r₂
m₁ m₂ = r₁ r₂

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Theory of Machine
The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is

l = 2p - 4
l = 2p - 3
l = 2p - 5
l = 2p - 2

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Theory of Machine
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

None of the listed here
Smaller OR Larger
Smaller
Larger

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Theory of Machine
The unbalanced force due to reciprocating masses

Constant in magnitude and direction both
Varies in direction but constant in magnitude
Varies in magnitude and direction both
Varies in magnitude but constant in direction

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Theory of Machine
The natural frequency of free transverse vibrations due to a point load acting over a simply supported shaft is equal to (where δ = Static deflection of a simply supported shaft due to the point load)

0.571/√δ
0.6253/√δ
0.5615/√δ
0.4985/√δ

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