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Machine Design

Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Square
Buttress
Metric
Acme

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

1
1/π
π
π × number of teeth

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Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

1.6 d
2.5 d
2 d
1.2 d

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Machine Design
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be

6
10
4
8

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Machine Design
For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is

1/sinθ
sinθ cosθ
1/tanθ
1/cosθ

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Machine Design
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

135°
180°
90°
160°

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