The demonstrates how long a part may survive or the maximum allowable loads that can be applied without causing failure. a. fatigue limit
b. endurance test
c. fatigue test
d. endurance limit

c. Fatigue test

Explanation:

In material science and in creation of an object that would carry load, the object is subjected a load testing known as fatigue testing, this is required to determine the capability of the equipment and the extent to which it can sustain it's maximum load without failure, this is known as fatigue testing. This is required to guard against many failures of equipments.

can you explain a little further maybe give multiple choice? ?

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.