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Theory of Machine

Theory of Machine
If there are L number of links in a mechanism, then number of possible inversions is equal to

L + 1
L
L + 2
L - 1

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Theory of Machine
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

m/(m + M)
M/(m + M)
(m + M)/M
(m + M)/m

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Theory of Machine
The critical speed of a shaft depends upon its

Stiffness and eccentricity
Mass and stiffness
Stiffness
Mass

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Theory of Machine
The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

ω² R cosθ
ω² (R - r₁) sinθ
ω² (R - r₁) cosθ
ω² r₁ sinθ

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Theory of Machine
The direction of linear velocity of any point on a link with respect to another point on the same link is

Perpendicular to the link joining the points
At 45° to the link joining the points
None of the listed here
Parallel to the link joining the points

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Theory of Machine
To obviate axial thrust, following gear drive is used

Double helical gears having opposite teeth
Double helical gears having identical teeth
Single helical gear in which one of the teeth of helix angle a is more
Mutter gears

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MORE MCQ ON Theory of Machine

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