Manufacturing And Production Technology
Allowance in limits and fits refers to

Difference between maximum and minimum sizes of shaft
Maximum clearance between shaft and hole
Minimum clearance between shaft and hole
Difference between maximum and minimum sizes of hole

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Manufacturing And Production Technology
During normalizing process of steel, the specimen is heated

Between the upper and lower critical temperature and cooled in still air.
Between the upper and lower critical temperature and cooled in furnace.
Above the upper critical temperature and cooled in still air.
Above the upper critical temperature and cooled in furnace.

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Manufacturing And Production Technology
In ultrasonic machining, the metal is removed by

Direct contact of tool with the work
Maintaining an electrolyte between the work and tool in a very small gap between the two
Using abrasive slurry between the tool and work
Erosion caused by rapidly recurring spark discharges between the tool and work

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