________ are those dimensions that should not necessarily appear on the drawing.

This question was previously asked in
RRB ALP Electronics Mechanic 21 Jan 2019 Official Paper (Shift 1)
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  1. Functional dimensions
  2. Non-functional dimensions
  3. Object dimensions
  4. Auxiliary dimensions

Answer (Detailed Solution Below)

Option 4 : Auxiliary dimensions
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The correct answer is Auxiliary dimensions.

Key Points

  • Auxiliary dimensions are those dimensions that should not necessarily appear on the drawing.
  • When utilized for manufacturing or inspection, auxiliary measurements shouldn't be tolerable and should always be placed in parentheses (brackets).
  • Additional dimensions are redundant dimensions that offer helpful data but do not influence whether a product will be accepted.
  • On technical drawings, dimensions are graphically represented with lines, symbols, and comments and expressed numerically in the proper unit of measurement. 

Important Points

  • The function of a component or space depends on a dimension known as the functional dimension (F). They typically have limits shown.
  • A dimension that is not necessary for a component's or space's function is referred to as a non-functional dimension (NF). 
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