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Machine Design

Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

1.6 d
2.5 d
1.2 d
2 d

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Machine Design
The edges of a boiler plate are bevelled to an angle of

45°
60°
30°
80°

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Machine Design
Antifriction bearings are

Hydrodynamic bearings
None of these
Sleeve bearings
Thin lubricated bearings

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Machine Design
A column of length l is fixed at both ends. The equivalent length of the column is

l/2
l
2 l
l/√2

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Machine Design
The design of pin of a rocker arm of an I.C. engine is based on

Bearing failure
Bending failure
All of these
Shearing failure

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Machine Design
The coefficient of friction in belt drive depends upon

Material of pulley
Material of belt
Belt velocity
Materials of belt and pulley

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