Machine Design
Cast iron pipes are mainly used

All of these
For conveying steam
In pressure lubrication systems on prime movers
In water and sewage systems

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Machine Design
The elasticity is the property of a material which enables it to

Regains its original shape after deformation when the external forces are removed
Resists fracture due to high impact loads
Draw into wires by the application of a tensile force
Retain deformation produced under load permanently

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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
The new belt will carry more than its share and result in short life
New and old belts will cause vibrations
Belts are available in sets

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Machine Design
In worm, gears, pitch lead angle is

None of these
The angle between the tangent to the pitch helix and the plane of rotation
The angle between the tangent to the pitch helix and an element of the cylinder
Half the angle between two inclined faces in axial plane

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