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Machine Design

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

Hexagonal nut
Castle nut
Any one of the above
Slotted nut

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Machine Design
In order to withstand resistance to wear, the best profile of gear is

20° full depth involute tooth
14½° stub tooth
20° involute stub tooth
14½° full depth involute tooth

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Machine Design
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

10
6
4
8

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Machine Design
The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

1680 d
1420 d
2840 d
2080 d

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Machine Design
Which of the following welded joint is designed for shear strength?

Transverse fillet welded joint
Butt welded joint
Parallel fillet welded joint
All of these

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Machine Design
The included angle for the British standard whitworth thread is

60°
55°
29°
47.5°

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