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Machine Design

Machine Design
The ratio of endurance limit in shear to the endurance limit in flexure is

0.4
0.55
0.33
0.5

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Machine Design
The square threads are usually found on

Feed mechanism of machine tools
Screw cutting lathes
Spindles of bench vices
Railway carriage couplings

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Machine Design
In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to

1 d
1.5 d
1.75 d
1.25 d

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Machine Design
The shock resistance of steel is increased by adding

Nickel
Chromium
Nickel and chromium
Cobalt and molybdenum

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Machine Design
In most machine members, the damping capacity of the material should be

High
Zero
Low
Could be anything

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Machine Design
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

7.2 N/mm² tension
3.6 N/mm² tension
7.2 N/mm² compression
3.6 N/mm² compression

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