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Machine Design

Machine Design
The suitable material for belt used in flour mill is

Leather
Canvas or cotton duck
Balata gum
Rubber

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Machine Design
The helix angle for single helical gears ranges from

35° to 50°
20° to 35°
10° to 15°
15° to 20°

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Machine Design
A spring is used to

All of these
Store energy
Measure forces
Apply forces

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Machine Design
The resilience of a bolt may be increased by

Decreasing its length
Increasing its shank diameter
Decreasing its shank diameter
Increasing its length

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Machine Design
If threads on a bolt are left hand, threads on nut will be

Left hand with same pitch
Right hand with fine pitch
Could be left or right hand
Right hand with same pitch

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Machine Design
The material commonly used for crane hooks is

Mild steel
Wrought iron
Aluminium
Cast iron

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