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Machine Design

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

2.5 d
2 d
1.2 d
1.6 d

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Machine Design
Fabric belts are used in industrial applications because

None of these
They are unaffected by moisture and humidity
They can work at high temperature
They are cheap

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Machine Design
Lewis equation is applied

Only to the gear
To stronger of the pinion or gear
To weaker of the pinion or gear
Only to the pinion

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Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to (Where, Pc = tension in belt due to centrifugal force)

3 Pc
Pc/3
1 Pc
2 Pc

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Machine Design
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of

0.45
0.55
0.75
0.65

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Machine Design
For high speed engines, the cam follower should move with

Simple harmonic motion
Uniform acceleration and retardation
Cycloidal motion
Uniform velocity

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