Open Time #1 describes the time interval between applying adhesive and when it is no longer workable.

• A. Cure Time
• B. Open Time #2
• C. Open Time #1
• D. Working Time

Answer: (C)

The main idea here is understanding the time window you have to work with adhesive after it’s applied. Open Time describes the period during which the adhesive remains workable enough for positioning and adjustments after it’s been laid down. Open Time #1 specifically refers to that initial window of workability before the adhesive begins to set, which is exactly the interval described as the time between application and when it’s no longer workable. This is different from Cure Time, which is about how long it takes to reach full strength, and from Working Time, a broader term that can cover the overall period you have to handle or manipulate the adhesive before it starts to set. Some products may have multiple open-time windows (like Open Time #2) for different phases, but the scenario described focuses on the initial window, making Open Time #1 the best fit.