Machine Design - GATE practice papers - Mechanical for Q. 363
Q. Why is the maximum stress applied to any machine element should always be less than its ultimate stress or critical stress? (Marks: 02)- Published on 19 Oct 15a. for safety against machine failure
b. to make complete use of mechanical properties of the machine element
c. both a. and b
d. none of the above
ANSWER: both a. and b
To design any machine element, safety is always considered as an important factor. Also to make use of mechanical properties of the machine element before its failure, it is designed in such a manner that the maximum applied stress should be less than its ultimate stress or critical stress. This applied stress is called as allowable stress or working stress.
