MEC 322 WEEK 1 EXAM QUESTIONS
AND ANSWERS GRADED A+ 2026
Metrology: - ANS science of measurement, it includes all theoretical and practical aspects of
measurement
How is metrology used by the manufacturing engineer? - ANS to measure that the parts are
within tolerance
Factors that determine the performance of a manufactured product, other than mechanical and
physical properties, include: - ANS 1. Dimensions
2. Tolerances
Dimensions: - ANS linear or angular sizes of a component specified on the part drawing
Tolerances: - ANS allowable variations from the specified part dimensions that are permitted
in manufacturing, defines the limits of the allowed variation
Dimensions on part drawings represent: - ANS nominal or basic sizes of the part and its
features
Dimension indicates: - ANS the part size desired by the designer, if the part could be made
with no errors or variation sin the fabrication process
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
, Too small tolerance leads to? - ANS high costs
Importance of tolerance? - ANS 1. parts from the same machine can be different in terms of;
speed of operation, temp, lubrications, variation of incoming material
2. ISO system
Bilateral tolerance: - ANS variation allowed in both postive and negative directions from the
nominal dimension
(bilateral tolerance can be unbalanced ex. +0.1, -0.2)
Unilateral tolerance - ANS varaition from the specififec dimension in one direction only
(either positive of neg, not both)
geometric tolerance - ANS tolereances that involve shape feautres of the part
allowance - ANS the specific difference in dimensions b/t mating parts
basic size - ANS dimension from which limits of size are derived
clearance - ANS tha space b/t mating parts
clearance fit - ANS fit that allows for rotation or sliding b/t mating parts
datum - ANS theoretically exact axis, point, line or plane
feature - ANS physically identifiable portion of a part eg. hole, slot, pin
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 2
AND ANSWERS GRADED A+ 2026
Metrology: - ANS science of measurement, it includes all theoretical and practical aspects of
measurement
How is metrology used by the manufacturing engineer? - ANS to measure that the parts are
within tolerance
Factors that determine the performance of a manufactured product, other than mechanical and
physical properties, include: - ANS 1. Dimensions
2. Tolerances
Dimensions: - ANS linear or angular sizes of a component specified on the part drawing
Tolerances: - ANS allowable variations from the specified part dimensions that are permitted
in manufacturing, defines the limits of the allowed variation
Dimensions on part drawings represent: - ANS nominal or basic sizes of the part and its
features
Dimension indicates: - ANS the part size desired by the designer, if the part could be made
with no errors or variation sin the fabrication process
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
, Too small tolerance leads to? - ANS high costs
Importance of tolerance? - ANS 1. parts from the same machine can be different in terms of;
speed of operation, temp, lubrications, variation of incoming material
2. ISO system
Bilateral tolerance: - ANS variation allowed in both postive and negative directions from the
nominal dimension
(bilateral tolerance can be unbalanced ex. +0.1, -0.2)
Unilateral tolerance - ANS varaition from the specififec dimension in one direction only
(either positive of neg, not both)
geometric tolerance - ANS tolereances that involve shape feautres of the part
allowance - ANS the specific difference in dimensions b/t mating parts
basic size - ANS dimension from which limits of size are derived
clearance - ANS tha space b/t mating parts
clearance fit - ANS fit that allows for rotation or sliding b/t mating parts
datum - ANS theoretically exact axis, point, line or plane
feature - ANS physically identifiable portion of a part eg. hole, slot, pin
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 2
