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Machine Design

Machine Design
In a marine flange coupling, the thickness of flange is taken as

d/3
d/4
3d/4
d/2

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

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Machine Design
The ratio of the ultimate stress to the design stress is known as

Elastic limit
Factor of safety
Strain
Bulk modulus

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Machine Design
The piston pin bearings in heavy duty diesel engines are

Needle roller bearings
Tapered roller bearings
Spherical roller bearings
Cylindrical roller bearings

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Machine Design
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

Completely reversed load
Static as well as dynamic load
Static load
Dynamic load

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Machine Design
The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

1420 d
2840 d
2080 d
1680 d

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