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Machine Design

Machine Design
The suitable material for belt used in flour mill is

Rubber
Canvas or cotton duck
Balata gum
Leather

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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)

1 Pc
2 Pc
3 Pc
Pc/3

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Machine Design
The process extensively used for making bolts and nuts is

Cold peening
Cold heading
Extrusion
Hot piercing

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

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

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Machine Design
The included angle for the V-belt is usually

30°-40°
60°-80°
40°-60°
10°-20°

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Machine Design
Idler pulley is used for

Increasing velocity ratio
All of these
Changing the direction of motion of belt
For applying tension

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MORE MCQ ON Machine Design

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