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Machine Design

Machine Design
The included angle in unified of American National threads is

60°
47°
55°
29°

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Machine Design
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

p = D sin (360°/T)
p = D sin (180°/T)
p = D sin (90°/T)
p = D sin (120°/T)

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Machine Design
The helix angle for double helical gears may be made up to

45°
90°
75°
60°

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Machine Design
The maximum shear stress theory is used for

Brittle materials
Ductile materials
Nonferrous materials
Plastic materials

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Machine Design
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

Clearance
Face width
Working depth
Backlash

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Machine Design
The product of the diametral pitch and circular pitch is equal to

π × number of teeth
π
1/π
1

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MORE MCQ ON Machine Design

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