Structural Pest Control Applicator Practice Exam

If 1 pound of wettable powder is recommended per 100 gallons of water, how many tablespoons of WP should you add to 1 gallon?

1. 0.5 tablespoon

2. 1 tablespoon

3. 1 teaspoon

4. 2 teaspoons

The correct answer is: 1 teaspoon

To determine how many tablespoons of wettable powder (WP) to add to 1 gallon of water, given that 1 pound of WP is recommended for 100 gallons, we first need to establish the amount of WP per gallon. Since 1 pound of WP is required for 100 gallons, dividing this amount by 100 gives us the WP needed for just 1 gallon. This results in 0.01 pounds of WP per gallon (1 pound / 100 gallons = 0.01 pounds per gallon). Next, we need to convert this weight into a more manageable volume measurement like teaspoons or tablespoons. One pound is equivalent to 16 ounces. Therefore, 0.01 pounds equals 0.16 ounces (0.01 pounds × 16 ounces/pound). Since there are 2 tablespoons in 1 ounce, we can convert this amount further: 0.16 ounces × 2 tablespoons/ounce = 0.32 tablespoons. When we convert tablespoons to teaspoons (since there are 3 teaspoons in a tablespoon), we find that: 0.32 tablespoons × 3 teaspoons/tablespoon = approximately 0.96 teaspoons. This value closely aligns with 1 teaspoon, suggesting that the best practical measurement