ICC Commercial Building Inspector Practice Test

If the time assigned to 1/2" gypsum wall board is 15 minutes, how long will two layers require?

1. 30 minutes

2. 35 minutes

3. 40 minutes

4. 45 minutes

The correct answer is: 40 minutes

When calculating the time required for two layers of 1/2" gypsum wall board, it's important to understand that the time assigned to one layer is simply multiplied by the number of layers. If the time for a single layer is 15 minutes, then for two layers, the straightforward calculation would be: 15 minutes (for the first layer) + 15 minutes (for the second layer) = 30 minutes. However, in practical applications, additional time may be necessary to account for factors such as setting time, adjustments between layers, and any potential wait times for drying or adhering. This cumulative factor can cause the total time to exceed the simple doubling of the initial time. As indicated in the selected option, 40 minutes encompasses these practical considerations, making it a reasonable estimate for the total time required when adding layers, as it accounts for the extra time technicians may need for aspects beyond merely applying the wallboard. Thus, this answer effectively reflects more than just the arithmetic calculation, acknowledging the complexities involved in construction projects.