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Machine Design

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

152°
40°
122°
136°

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Machine Design
Allen bolts are

Self locking bolts
Designed for shock load
Provided with hexagonal depression in head
Used in aircraft application

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Machine Design
The material used for brake lining should have __________ coefficient of friction.

None of these
High
Low
Moderate

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Machine Design
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

Ring nut
Jam nut
Sawn nut
Castle nut

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Machine Design
For tight leakage joints, following type of thread is best suited

Square
Metric
Buttress
NPT (national pipe threads).

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Machine Design
The backlash for spur gears depends upon

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

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