Commodity Fumigation License Practice Exam

How should sand or water snakes be arranged for effective sealing of the tarp?

1. One row along each side

2. Two rows along the sides and three rows on the corners

3. Randomly placed around the tarp

4. Only at the corners of the tarp

The correct answer is: Two rows along the sides and three rows on the corners

For effective sealing of the tarp during fumigation, it is important to create a tight and secure barrier to contain the fumigant, preventing any leaks that could compromise the efficacy of the treatment. Arranging sand or water snakes in two rows along the sides and three rows on the corners provides the best combination of coverage and weight distribution. This setup addresses the primary concern of sealing by ensuring that all potential gaps where the tarp might lift or bow are adequately covered. The two rows along the sides add extra weight, helping to keep the tarp in contact with the ground and reducing the likelihood of air infiltration. The additional rows at the corners are critical as corners are often the weakest points in maintaining a seal. By placing them strategically, you enhance the overall integrity of the seal. Other arrangements, such as having just one row along each side, may not provide enough weight or coverage to prevent air from entering, while random placements can leave significant gaps that reduce the effectiveness of the fumigation process. Similarly, using only corner placement fails to secure the sides effectively, allowing for potential leaks along the edges. Thus, the arrangement of two rows along the sides and three rows on the corners is the most effective method for achieving a secure seal.