Machine Design
The cam follower extensively used in aircraft engines is

Flat faced follower
Knife edge follower
Roller follower
Spherical faced follower

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Machine Design
In a hydrodynamic lubricated bearing

The lubricant is forced between the journal and the bearing, by external pressure
There is a thick film of lubricant between the journal and the bearing
There is a thin film of lubricant between the journal and the bearing
There is no lubricant between the journal and the bearing

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Machine Design
When a belt drive is transmitting maximum power,

Driving tension on slack side is equal to centrifugal tension
Effective tension is half of centrifugal tension
Driving tension on tight side is twice the centrifugal tension
Effective tension is equal to centrifugal tension

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Machine Design
Machine screws are

Similar to stud
Used to prevent relative motion between two parts
Slotted for a screw driver and generally used with a nut
Similar to small size tap bolts except that a greater variety of shapes of heads are available

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