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Machine Design

Machine Design
When a close coiled helical spring is compressed, its wire is subjected to

Shear
Compression
Tension
All of these

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Machine Design
According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

3 × (π/4) d² × τ × n
1.875 × (π/4) d² × τ × n
2 × (π/4) d² × τ × n
(π/4) d² × τ × n

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Machine Design
In a butt welded joint, the size of weld is __________ the throat of weld.

Double
2 times
Equal to
0.5 times

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Machine Design
The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

14
12
24
18

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Machine Design
If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited

Acme
BSW
Square
Buttress

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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
Bending stress
Compressive stress
Shear stress

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