Machine Design- DESIGN OF MACHINE ELEMENTS
exam Study Questions with 100% Correct
Answers| Verified-
Series system - ✔✔All components must function or the system will fail. Reliability of
the system is the product of the individual reliabilities.
Example: 2 bearings with reliability's of 95% and 98%
R = (0.95)(0.98) = 0.93 = 93%
Tolerances - ✔✔Specify permissible variations of dimensions
Bilateral tolerance - ✔✔A tolerance that allows variation in both directions from the
design size.
Unilateral Tolerance - ✔✔A tolerance in which variation is permitted in only one
direction from the specified dimension.
Geometric tolerance - ✔✔A general term that refers to tolerances that control form,
profile, orientation, or location of a feature
Ex: flatness
Circularity for a circular surface
Si units - ✔✔Meters
exam Study Questions with 100% Correct
Answers| Verified-
Series system - ✔✔All components must function or the system will fail. Reliability of
the system is the product of the individual reliabilities.
Example: 2 bearings with reliability's of 95% and 98%
R = (0.95)(0.98) = 0.93 = 93%
Tolerances - ✔✔Specify permissible variations of dimensions
Bilateral tolerance - ✔✔A tolerance that allows variation in both directions from the
design size.
Unilateral Tolerance - ✔✔A tolerance in which variation is permitted in only one
direction from the specified dimension.
Geometric tolerance - ✔✔A general term that refers to tolerances that control form,
profile, orientation, or location of a feature
Ex: flatness
Circularity for a circular surface
Si units - ✔✔Meters