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Machine Design

Machine Design
If a material fails below its yield point, failure would be due to

Fatigue
Sudden loading
Creep
Straining

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If σt is the tensile stress for the shell material, then thickness of shell is equal to

pd/2σt
pd/4σt
pd/σt
pd/3σt

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Machine Design
The piston pin bearings in heavy duty diesel engines are

Cylindrical roller bearings
Spherical roller bearings
Tapered roller bearings
Needle roller bearings

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Machine Design
A crankshaft is a __________ shaft.

None of these
Transmission
Machine
Machine frame

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Machine Design
In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be

0.99
0.97
0.98
0.96

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

Could be anything
Zero
High
Low

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