AMS 375 UNIT 4 EXAM 2025 QUESTIONS
AND ANSWERS
Define fit - ANS Is the measurable size difference between two parts designed to be placed
together to form an assembly
What are the 3 classes of fit ? - ANS - clearance fit
- close tolerance fits
- interference fits
What is clearance fit ? - ANS Permit relative freedom of motion between parts (.002/.005)
What is close tolerance fit ? - ANS Are minimal clearance fits that allow precise alignment &
movement between two parts (.000/.0005)
What is interference fits ? - ANS Are considered to be tight fits between two parts. These
dimensions are usually illustrated with the letter "T" after the dimensional value
Compared to aluminum, what rate does aluminum expanded vs steel ? - ANS Aluminum
expands 2x as fast as steel ?
What is bend ? - ANS Is considered to be 1/2 of the T.I.R. (Total indicated run out) of shaft
What is backlash ? - ANS It's always gonna be a clearance between teeth
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AND ANSWERS
Define fit - ANS Is the measurable size difference between two parts designed to be placed
together to form an assembly
What are the 3 classes of fit ? - ANS - clearance fit
- close tolerance fits
- interference fits
What is clearance fit ? - ANS Permit relative freedom of motion between parts (.002/.005)
What is close tolerance fit ? - ANS Are minimal clearance fits that allow precise alignment &
movement between two parts (.000/.0005)
What is interference fits ? - ANS Are considered to be tight fits between two parts. These
dimensions are usually illustrated with the letter "T" after the dimensional value
Compared to aluminum, what rate does aluminum expanded vs steel ? - ANS Aluminum
expands 2x as fast as steel ?
What is bend ? - ANS Is considered to be 1/2 of the T.I.R. (Total indicated run out) of shaft
What is backlash ? - ANS It's always gonna be a clearance between teeth
1 COPYRIGHT © 2025 SIRJOEL ALL RIGHTS RESERVED
