Two extreme permissible sizes of a part, between which actual size should lie is called ______

Explanation:

Size: It is a number expressed in a specific unit of measurement of length.

• Actual Size: This is the actual measured size of the component after its manufacture.
• Basic Size: This is the size that gives dimensional variations.
• Size Limits: These are the maximum allowable sizes that the operator is expected to produce the component.

Deviation: It is the algebraic difference between a size and its base size. It can be positive, negative or zero.

• Upper deviation: It is the algebraic difference between the maximum size limit and its base size.
• Lower deviation: It is the algebraic difference between the minimum size limit and its base size.
• Fundamental deviation: This is the deviation that is closest to the zero line either above or below.
  The highest deviation is the deviation that gives the maximum range of size. The lower deviation is the deviation that gives the lowest limit of size.
• Actual Deviation: It is the algebraic difference between the actual size and its base size.

Tolerance: It is the difference between the maximum size limit and the minimum size limit. It is always positive and is represented only by a number without a sign..