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Machine Design

Machine Design
The product of the diametral pitch and circular pitch is equal to

1
π × number of teeth
π
1/π

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Machine Design
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

None of these
Less
More
Same

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Machine Design
The dedendum is the radial distance from the

Top of a tooth to the bottom of a tooth
Pitch circle to the bottom of a tooth
Pitch circle to the top of a tooth
Addendum circle to the clearance circle

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Machine Design
In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called

Normal pitch
Module
Axial pitch
Diametral pitch

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Machine Design
In order to obtain bolt of uniform strength

Tighten die bolt properly
Increase shank diameter
Drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread
Increase its length

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Machine Design
Oldham coupling is used to connect two shafts

Which have lateral misalignment
Which are perfectly aligned
Which are not in exact alignment
Whose axes intersect at a small angle

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