ADDA Drafting Certification:
Terminology, Dimensions, Layouts,
Geometric Dimensioning, and
Tolerancing Question and answers
verified to pass
actual size - correct answer ✔size of part as measured
allowance - correct answer ✔minimum clearance or maximum interference
between two mating parts
basic size - correct answer ✔size from which the limits of size are derived by
the applications of allowances and tolerance
clearance - correct answer ✔space between two mating parts
feature - correct answer ✔a portion of a part, such as a hole, keyway, or flat
surface
Least Material Condition - correct answer ✔maximum hole diameter or
minimum shaft diameter when a part weighs the least
Limits - correct answer ✔max and min allowable sizes of a feature
maximum material condition - correct answer ✔minimum hole diameter or
maximum shaft diameter when part weights the most
, reference dimension - correct answer ✔a non-toleranced dimension used for
information purposes only; may not govern production or inspection
dimension tolerance - correct answer ✔total amount by which the part
dimensions are permitted to vary
unilateral tolerance - correct answer ✔variation of size in one direction either
positive or negative
bilateral tolerance - correct answer ✔variation of size in both directions
positive and negative
specific tolerance - correct answer ✔stated with dimension in field of drawing
general tolerance - correct answer ✔stated in title block
clearance fit tolerance - correct answer ✔internal dimensions maintains a
smaller size than external between mating parts; fit type RC - Running and
Sliding; LC - locational clearance
interference fit tolerance - correct answer ✔internal dimension maintains a
larger size than external between mating parts; fit type LT - Transition
transition fit tolerance - correct answer ✔condition where a clearance or
interference fit may present between mating parts; fit type LN- Locational
interference; FN - Force or Shrink
basic hole system - correct answer ✔minimum hole size is used as the base
size for fit tolerance calculations
Terminology, Dimensions, Layouts,
Geometric Dimensioning, and
Tolerancing Question and answers
verified to pass
actual size - correct answer ✔size of part as measured
allowance - correct answer ✔minimum clearance or maximum interference
between two mating parts
basic size - correct answer ✔size from which the limits of size are derived by
the applications of allowances and tolerance
clearance - correct answer ✔space between two mating parts
feature - correct answer ✔a portion of a part, such as a hole, keyway, or flat
surface
Least Material Condition - correct answer ✔maximum hole diameter or
minimum shaft diameter when a part weighs the least
Limits - correct answer ✔max and min allowable sizes of a feature
maximum material condition - correct answer ✔minimum hole diameter or
maximum shaft diameter when part weights the most
, reference dimension - correct answer ✔a non-toleranced dimension used for
information purposes only; may not govern production or inspection
dimension tolerance - correct answer ✔total amount by which the part
dimensions are permitted to vary
unilateral tolerance - correct answer ✔variation of size in one direction either
positive or negative
bilateral tolerance - correct answer ✔variation of size in both directions
positive and negative
specific tolerance - correct answer ✔stated with dimension in field of drawing
general tolerance - correct answer ✔stated in title block
clearance fit tolerance - correct answer ✔internal dimensions maintains a
smaller size than external between mating parts; fit type RC - Running and
Sliding; LC - locational clearance
interference fit tolerance - correct answer ✔internal dimension maintains a
larger size than external between mating parts; fit type LT - Transition
transition fit tolerance - correct answer ✔condition where a clearance or
interference fit may present between mating parts; fit type LN- Locational
interference; FN - Force or Shrink
basic hole system - correct answer ✔minimum hole size is used as the base
size for fit tolerance calculations
