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Machine Design

Machine Design
The shock resistance of steel is increased by adding

Nickel
Chromium
Cobalt and molybdenum
Nickel and chromium

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Machine Design
In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

25
15
21
17

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Machine Design
The property of a bearing material which has the ability to accommodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating, is known as

Comformability
Embeddability
Bondability
Fatigue strength

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Machine Design
Cast iron pipes are mainly used

All of these
In pressure lubrication systems on prime movers
For conveying steam
In water and sewage systems

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Machine Design
Lewis form factor for 14½° composite and full depth involute system is (where T = Number of teeth)

0.124 - (0.684/T)
0.154 - (0.912/T)
None of these
0.175 - (0.841/T)

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Machine Design
For a square key made of mild steel, the shear and crushing strength are related as

None of these
Shear strength is greater than crushing strength
Shear strength is equal to crushing strength
Shear strength is less than crushing strength

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