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Theory of Machine

Theory of Machine
A higher pair has__________.

Point contact
No contact
None of these
Surface contact

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Theory of Machine
When the sleeve of a Porter governor moves downwards, the governor speed

Increases
Remain unaffected
First increases and then decreases
Decreases

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Theory of Machine
A mechanism consisting of four links is called a __________ mechanism.

Simple
None of these
Binary
Compound

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be

45 mm
95 mm
Slightly less than 45 mm
Slightly more than 45 mm

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Theory of Machine
Which one of the following is an exact straight line mechanism using lower pairs?

Peaucellier’s mechanism
Robert’s mechanism
Watt’s mechanism
Grasshopper mechanism

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Theory of Machine
Critical damping is a function of

Mass and natural frequency
Damping coefficient and natural frequency
Mass and damping coefficient
Mass and stiffness

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