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Machine Design

Machine Design
The difference between the upper limit and lower limit of a dimension is called

Tolerance
Basic size
Nominal size
Actual size

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Machine Design
When compared to the rod of the same diameter and material, a wire rope

Provides much greater time for remedial action before failure
Does not provide much warning before failure
Has a much smaller load carrying capacity
Is less flexible

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Machine Design
The bending stress in a curved beam is

None of these
Zero at the centroidal axis
Zero at the point other than centroidal axis
Maximum at the neutral axis

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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
0.96
0.98
0.97

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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/4σt
pd/2σt
pd/σt
pd/3σt

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

None of these
Vickers
Rockwell
Brinell

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