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Machine Design

Machine Design
Which is positive drive?

Crossed belt drive
Timing belt
V belt drive
Flat belt drive

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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

0.65
0.45
0.55
0.75

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Machine Design
A V-belt designated as B 4430 LP has

4430 mm as nominal pitch length
4430 mm as centre distance between pulleys
4430 mm as diameter of small pulley
4430 mm as diameter of large pulley

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

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

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Machine Design
If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as

b/L
1 - 2 b.L
1 - (b/L)
b/2L

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Machine Design
Factor of safety for fatigue loading is the ratio of

Elastic limit to the working stress
Endurance limit to the working stress
Young's modulus to the ultimate tensile strength
Elastic limit to the yield point

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