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Theory of Machine

Theory of Machine
The total number of instantaneous centers for a mechanism consisting of n links are

n - 1
n
n(n - 1)/2
n/2

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Theory of Machine
The advantage of the piston valve over the slide valve is that in the former case

The pressure developed being high provides tight sealing
Both wear and power absorbed are low
Wear is less
Power absorbed is less

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Theory of Machine
A rotary internal combustion engine has __________ cylinders.

Six
Seven
Four
Five

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Theory of Machine
The absolute acceleration of any point ‘P’ in a link about center of rotation ‘O’ is

At 45° to PO
None of the listed here
Along PO
Perpendicular to PO

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Theory of Machine
When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

D-slide valve
Governor
Meyer's expansion valve
Flywheel

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Theory of Machine
The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line

At 45° to line as per (A)
Not possible to determine with these data
Perpendicular to line as per (A)
Joining the corresponding points

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