In the shuttle calculation, what is the make-and-break time at the fill site?

• A. One and a half minutes
• B. Two minutes
• C. One minute
• D. Three minutes

Answer: (B)

Make-and-break time is the overhead required to attach and detach the shuttle at the fill site, including connecting the hoses, purging air, checking for leaks, and securing the connection before flow begins and after it ends. In shuttle calculations, you add this overhead to the actual pumping time to get the true cycle time for each fill. The standard value used for the fill site is two minutes because it reflects the typical amount of time needed to safely and reliably make the connection, verify everything is airtight, and then break it down and reposition for the next cycle. This ensures the calculation accounts for the time spent on setup and teardown, not just pumping. The other options don’t align with the established overhead duration used in these calculations.