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Machine Design

Machine Design
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

0.5 d
d
1.25 d
0.75 d

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Machine Design
The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using

Soderberg relation
Goodman relation
None of these
Gerber relation

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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
The cam follower generally used in automobile engines is

Knife edge follower
Flat faced follower
Spherical faced follower
Roller follower

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Machine Design
The ratio of pitch circle diameter in millimeters to the number of teeth, is called

Circular pitch
Diametral pitch
None of these
Module

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Machine Design
When a metal or alloy is cold worked,

Both (A) and (B)
It is worked below recrystallization temperature
Its hardness and strength increases
None of these

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