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Machine Design

Machine Design
The included angle for the British Association thread is

55°
47.3°
29°
60°

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Machine Design
The dynamic tooth load is due to

All of these
Deflections of teeth under load
Inaccuracies of tooth spacing
Irregularities in tooth profiles

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Machine Design
The size of a gear is usually specified by

Diametral pitch
Pressure angle
Circular pitch
Pitch circle diameter

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

Square
Metric
Acme
Buttress

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Machine Design
Creep in belt is due to

Uneven extensions and contractions due to varying tension
Material of the pulley
Material of the belt
All of these

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Machine Design
The form factor of a helical gear __________ with the increase in the helix angle.

None of these
Decreases
Remains constant
Increases

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