Multiple choice general knowledge science & technology

The key will fail in which of the following manner?

  1. a)shearing

  2. b)crushing

  3. c)both crushing and shearing

  4. d)none of the above

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A key in mechanical assembly fails by both crushing (compressive stress from the shaft) and shearing (transverse shear stress). The combined stress state makes it susceptible to both failure modes simultaneously, which is why key design considers both crushing and shear stresses.

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