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Machine Design

Machine Design
Rankine's theory is used for

Brittle materials
Elastic materials
Plastic materials
Ductile materials

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Machine Design
In a partial journal bearing, the angle of contact of the bearing with the journal is

270°
180°
360°
120°

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Machine Design
In the assembly of pulley, key and shaft

All the three are designed for equal strength
Key is made the weakest
Key is made the strongest
Pulley is made the weakest

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Machine Design
The bearings of medium series have capacity __________ over the light series.

40 to 50%
10 to 20%
30 to 40%
20 to 30%

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Machine Design
The wire ropes make contact at

Sides and bottom of groove of the pulley
Sides of groove of the pulley
Anywhere in the groove of the pulley
Bottom of groove of the pulley

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

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