NCCER Millwright Practice Exam

What does a positive result in an offset measurement indicate about the MTBM?

1. It is at the 12 o'clock side.

2. It is perfectly aligned.

3. It is offset or on the 3 o'clock side.

4. It is misaligned towards the left.

The correct answer is: It is offset or on the 3 o'clock side.

A positive result in an offset measurement indicates that the machine tool bearings measurement (MTBM) is offset or on the 3 o'clock side. This outcome suggests that there is a measurable gap or distance between the centerline of the equipment and the intended alignment position, specifically indicating a lateral displacement to the right side when facing the machine. Understanding offset measurements is crucial in millwright work, as proper alignment is instrumental for the effective operation of machinery. If the measurement yields a positive result, it demonstrates that adjustments need to be made to realign the elements of the system appropriately. In contrast, a perfectly aligned MTBM would show no offset measurement, indicating all parts are in line with each other. An indication of being at the 12 o'clock side typically relates to vertical alignment rather than lateral displacement. Misalignment towards the left would correspond to a negative offset measurement, which falls outside of what a positive reading specifies.