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Machine Design

Machine Design
A single strap butt joint is always in __________ shear.

Single
None of these
Double
Triple share

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Machine Design
The number of slots in a 25 mm castle nut is

8
6
2
4

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Machine Design
If a load W is applied instantaneously on a bar; Then the stress induced in bar will

Increase with increase in y
Decrease with decrease in y
Be independent of ratio of mass of load W to mass of bar (y)
Depend on other considerations

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Machine Design
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

0.5 d
1.25 d
d
0.75 d

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is

Tensile stress
Compressive stress
Shear stress
Bending stress

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Machine Design
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

Vickers
Rockwell
Brinell
None of these

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