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Machine Design

Machine Design
In Vickers hardness testing, the pyramid indentor apex is

152°
136°
40°
122°

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Machine Design
The backlash for spur gears depends upon

Module
Pitch line velocity
Tooth profile
Both module and pitch line velocity

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Machine Design
At low temperatures (say 75°C) the notched bar impact value of steel

Increases markedly
Remain same
Decreases markedly
Depends on heat treatment carried out

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Machine Design
A column is known as a long column if the slenderness ratio is

100
50
70
40

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Machine Design
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

80 to 90%
45 to 60%
70 to 83%
63 to 70%

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Machine Design
The radial distance of a tooth from the pitch circle to the top of the tooth is called

Clearance
Addendum
Working depth
Dedendum

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