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Machine Design

Machine Design
The constant factor in case of R10 series of preferred numbers is

1.58
1.06
1.12
1.26

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

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

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Machine Design
Lewis equation is applied

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

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Machine Design
The cross-section of the arm of a bell crank lever is

Elliptical
Any one of these
Rectangular
I-section

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Machine Design
Surface endurance limit of gear material is dependent upon its

Yield strength
Brinell hardness number
Elastic strength
Toughness

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Machine Design
The efficiency of a riveted joint is equal to

Ps /P
Pc /P
Least of Pt, Ps and Pc/P
Pt /P

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