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Machine Design

Machine Design
The material commonly used for machine tool bodies is

Mild steel
Cast iron
Aluminium
Brass

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Machine Design
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

p = D sin (90°/T)
p = D sin (180°/T)
p = D sin (120°/T)
p = D sin (360°/T)

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Machine Design
Wire ropes as compared to cotton ropes

Can withstand shock loads
Offer silent operation
All of these
Are lighter in weight

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Machine Design
A steel containing 0.8% carbon is known as

Hypereutectoid steel
Hypo-eutectoid steel
None of these
Eutectoid steel

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Machine Design
The resilience of a bolt may be increased by

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

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Machine Design
Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

2
8
4
16

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