Question $20$

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Which of the following statement is NOT correct $($Choose one answer$)?$

a$.$ The word prognostic defines studies that look backward and analyze exposures to suspected risk factors

b$.$ Lack of performance is most often component failure.

c$.$ Prognostics is an engineering discipline focused on predicting the time at which a component will no longer perform a particular function.

d$.$ The science of prognostics is based on the analysis of failure modes, detection of early signs of wear and aging, and fault conditions.

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