The algebraic difference between the upper limit and the lower limit is called ______

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  1. clearance 
  2. upper limit 
  3. interference 
  4. tolerance 

Answer (Detailed Solution Below)

Option 4 : tolerance 
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Detailed Solution

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Concept:

  • Nominal size is the size of a part specified in the drawing as a matter of convenience.
  • The actual size is the actually measured dimension of the part.
  • Tolerance is the difference between the upper limit and the lower limit of a dimension.
  • In other words, it is the maximum permissible variation in a dimension.
  • The tolerance may be unilateral or bilateral.
  • Interference: A negative difference between the diameter of the hole and the shaft is called interference.

 

Important Points

When all the tolerance is allowed on one side of the nominal size, e.g.  , then it is said to be a unilateral system of tolerance.

When tolerance is allowed on both sides of the nominal size e.g.  then it is said to be a bilateral system of tolerance.

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