Machine Design
The objective of caulking in a riveted joint is to make the joint

Leak-proof
Free from stress
Stronger in tension
Free from corrosion

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Machine Design
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because

Only one belt cannot be fitted with other used belts
Belts are available in sets
New and old belts will cause vibrations
The new belt will carry more than its share and result in short life

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Machine Design
In hydrodynamic bearings

Grease is used for lubrication
Do not require external supply of lubricant
The oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure

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Machine Design
A compound belt drive is used when

Shafts are arranged parallel and rotate in the opposite directions
None of these
Shafts are arranged at right angles and rotate in one definite direction
Shafts are arranged parallel and rotate in the same directions

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