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Machine Design

Machine Design
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

0.5
0.2
0.65
0.35

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Machine Design
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

Vickers
Brinell
Rockwell
None of these

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Machine Design
The washer is generally specified by its

Mean diameter
Outer diameter
Hole diameter
Thickness

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Machine Design
The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given by Where m = mass of belt per meter (kg/m) v = belt velocity (m/s) f = coefficient of friction a = angle of wrap (radians)

(P1 - mv²)/ (P2 - mv²) = eᶠα
P1 / P2 = e–ᶠα
(P1 - mv²)/ (P2 - mv²) = e–ᶠα
P1 / P2 = eᶠα

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Machine Design
The property of a material which enables it to resist fracture due to high impact loads is known as

Strength
Toughness
Elasticity
Endurance

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Machine Design
Gears are casted by

Slush casting
Permanent mould casting
Centrifugal casting
Sand mould casting

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