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Machine Design

Machine Design
The number of slots in a 25 mm castle nut is

2
8
6
4

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Machine Design
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be

2 times more
4 times more
3 times more
Same in both cases

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Machine Design
When two springs are in series (having stiffness K), the equivalent stiffness will be

K
2K
K/4
K/2

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Machine Design
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called

Module
Axial pitch
Normal pitch
Diametral pitch

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Machine Design
The wear load should be __________ the dynamic load.

Less than
Greater than
Equal to
None of these

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Machine Design
If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio

None of these
Increases
Decreases
Remains unchanged

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