Correct Answer:
A) Due to unexpected machinery failure caused by abnormal operating conditions or unforeseen issues
Explanation:
Even with a scheduled maintenance system, machinery can fail unexpectedly due to factors like abnormal operating conditions, unforeseen mechanical issues, or human error. Unscheduled maintenance is necessary to address these unexpected failures.
Correct Answer:
A) Due to unexpected machinery failure caused by abnormal operating conditions or unforeseen issues
Explanation:
Even with a scheduled maintenance system, machinery can fail unexpectedly due to factors like abnormal operating conditions, unforeseen mechanical issues, or human error. Unscheduled maintenance is necessary to address these unexpected failures.