Construction Coordinator Practice Exam

What should you do before using a measuring wheel?

1. Ensure the wheel is clean

2. Calibrate the measuring wheel with a standard length

3. Set the measuring wheel distance counter to zero

4. Check the surface for evenness

The correct answer is: Set the measuring wheel distance counter to zero

Setting the measuring wheel distance counter to zero is essential before beginning any measurements as it ensures accuracy. If the counter is not reset, any previous measurements could influence the current data, leading to incorrect calculations. By zeroing the counter, you effectively establish a clear starting point for your measurement, allowing you to accurately track distances as you progress. Ensuring the measuring wheel is clean contributes to accurate readings but is secondary to resetting the counter, as cleanliness alone doesn’t address previous accumulated measurements. Calibrating the measuring wheel with a standard length can enhance accuracy, yet this process wouldn't be necessary for every use, especially if there has been no significant wear or change to the wheel's performance. Checking the surface for evenness is important for physical stability and ensuring the wheel rolls correctly, but it does not directly affect the measuring counter's accuracy.