Intro to Millwright Practice Exam

How is the ratio determined when calculating shims?

1. Multiplying the height by the load

2. Dividing the distance between anchor points by the length of the level

3. Adding the lengths of all shims

4. Subtracting the level length from anchor points

The correct answer is: Dividing the distance between anchor points by the length of the level

The correct approach to determining the ratio when calculating shims involves understanding how the geometry of the setup affects leveling. This requires dividing the distance between anchor points by the length of the level, as it establishes how far apart the points of adjustment are in relation to the length of the level being used. By calculating this ratio, you can determine how the shims need to be positioned to properly level the machine or structure being adjusted. This method ensures that any adjustments made by the shims will result in an accurate leveling across the entire span, taking into account the physical distance involved. The other methods don't align with the fundamental need for a ratio in shim calculation; multiplying height by load pertains more to force calculations, adding shim lengths does not determine a ratio but simply totals them, and subtracting level length from anchor points does not provide a direct relationship necessary for calculating how shims should be used. Understanding this ratio is crucial for precise alignment and is a best practice in millwright work.