Question

an engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of:
a. using design techniques that increase efficiency and reduce costs.
b. using composite materials that combine strengths.
c. using a material for multiple applications.
d. choosing a material that will show warning before it fails.

Explanation:

The engineer chooses a weaker material because the stronger one can break suddenly (no warning). The weaker material likely shows signs (warning) before failure. Options A (efficiency/costs), B (composite materials), and C (multiple applications) are not related to the "sudden break" - warning aspect.

Answer:

D. choosing a material that will show warning before it fails.