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Theory of Machine

Theory of Machine
A cam mechanism imparts following motion

Rotating
All of these
Reciprocating
Oscillating

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Theory of Machine
In a four stroke I.C. engine, the turning moment during the compression stroke is

Positive throughout
Negative during major portion of the stroke
Positive during major portion of the stroke
Negative throughout

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Theory of Machine
Idler pulley is used

All of the listed here
For changing the direction of motion of the belt
For increasing velocity ratio
For applying tension

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

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Theory of Machine
The cam follower generally used in aircraft engines is

Spherical faced follower
Flat faced follower
Knife edge follower
Roller follower

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Theory of Machine
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

180°
270°
90°
0°

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