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Machine Design

Machine Design
The groove angle of pulleys for V-belt is

340 to 360
More than 400
300 to 320
420 to 450

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Machine Design
The maximum efficiency of a square threaded screw is

(1 - sinφ)/ (1 + sinφ)
(1 + cosφ)/ (1 - sinφ)
(1 + sinφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + cosφ)

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Machine Design
The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

24
14
18
12

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Machine Design
The groove angle of the pulley for rope drive is usually

35°
45°
20°
60°

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Machine Design
The size of a gear is usually specified by

Circular pitch
Pitch circle diameter
Pressure angle
Diametral pitch

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Machine Design
The following type of nut is used with alien bolt

Castle nut
Slotted nut
Any one of the above
Hexagonal nut

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