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Theory of Machine

Theory of Machine
V-belts are usually used for

Long and short drives
Short drives
None of these
Long drives

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Theory of Machine
Elements of pairs held together mechanically is known as

Open pair
Closed pair
Mechanical pair
Rolling pair

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Theory of Machine
The motion between a pair which takes place in ____ is known as incompletely constrained motion.

Two directions only
More than one direction
One direction only
None of the listed here

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Theory of Machine
In an open pair, the two elements of a pair

Are not held together mechanically
Have a surface contact when in motion
Are kept in contact by the action of external forces, when in motion
Have a line or point contact when in motion

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Theory of Machine
Rectilinear motion of piston is converted into rotary by

Gudgeon pin
Cross head
Connecting rod
Slider crank

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Theory of Machine
In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)

(r₁ + r₂) (x/y)
(r₁ - r₂) (x/y)
(r₁ + r₂) (y/x)
(r₁ - r₂) (y/x)

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