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Machine Design

Machine Design
A bench vice has following type of threads

Square
Buttress
Acme
Metric

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Machine Design
A steel containing 0.8% carbon is known as

None of these
Eutectoid steel
Hypereutectoid steel
Hypo-eutectoid steel

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If σt is the tensile stress for the shell material, then thickness of shell is equal to

pd/3σt
pd/4σt
pd/2σt
pd/σt

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Machine Design
The shock absorbing capacity of a bolt can be increased by

Grinding the shank
Making shank diameter equal to core diameter of thread
Increasing shank diameter
Tightening it properly

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Machine Design
Silver based solder is used for

Soft soldering
Fusion welding
Brazing
Flaring

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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

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

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