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Theory of Machine

Theory of Machine
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to

sinφ
cosφ
secφ
cosecφ

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Theory of Machine
The Kutzbach criterion for determining the number of degrees of freedom (n) is (where l = number of links, j = number of joints and h = number of higher pairs)

n = 2(l - 1) - 3j - h
n = 2(l - 1) - 2j - h
n = 3(l - 1) - 2j - h
n = 3(l - 1) - 3j - h

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Theory of Machine
The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)

c (m - M) g
c/(m - M) g
c (m + M) g
c/(m + M) g

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Theory of Machine
The instantaneous centers which vary with the configuration of mechanism are called

None of these
Permanent instantaneous centers
Fixed instantaneous centers
Neither fixed nor permanent instantaneous centers

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Theory of Machine
Which of the following would constitute a link?

Piston, piston rod and cross head
Piston, crank pin and crank shaft
Piston rod and cross head
Piston and piston rod

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Theory of Machine
An automobile steering gear is an example of

Sliding pair
Lower pair
Higher pair
Rolling pair

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