NCCER Millwright Practice Exam

When fabricating a jig, what should be minimized to ensure accuracy?

1. Material costs

2. Indicator sag

3. Time delays

4. Workforce requirements

The correct answer is: Indicator sag

In the process of fabricating a jig, minimizing indicator sag is crucial for ensuring accuracy. Indicator sag refers to the deflection or bending that can occur in measurement tools like dial indicators when they are not properly supported or mounted. This sag can lead to incorrect readings, which undermines the precision of the jig's setup. A jig that is intended to hold or guide workpieces during machining processes must be constructed with precise measurements; even slight inaccuracies can lead to significant errors in the final product. By focusing on minimizing indicator sag, you ensure that the measurements taken during the jig's fabrication are reliable. This ultimately contributes to creating a more effective jig that performs consistently during its intended applications. Other factors, such as material costs, time delays, and workforce requirements, while important in the overall manufacturing process, do not directly impact the accuracy of the jig itself in the same way as indicator sag does.