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Machine Design

Machine Design
Which of the following has threads at both ends?

Stud
None of these
Bolt
Tap bolt

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Machine Design
The strength of the unriveted plate (P) per pitch length is equal to

p.t.σt
(p - d) t.σt
p.d.σt
(p - d) σt

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Machine Design
The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is

10 microns
1 micron
0.01 micron
0.1 micron

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Machine Design
The algebraic difference between the maximum limit and the basic size is called

Mean deviation
Lower deviation
Actual deviation
Upper deviation

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

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Machine Design
When a metal or alloy is cold worked,

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

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