Red Seal Lather (Interior Systems Mechanic) Practice Exam

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What is the ideal temperature range for applying and drying joint compound?

30°F to 50°F
50°F to 90°F
70°F to 100°F
0°F to 32°F

The correct answer is: 50°F to 90°F

The ideal temperature range for applying and drying joint compound is between 50°F and 90°F. This range ensures that the compound adheres properly and dries at an appropriate rate, which is crucial for achieving a smooth finish without cracking or shrinking. Temperatures below 50°F can slow down the drying process significantly, leading to possible application issues and extending the project timeline. On the other hand, temperatures above 90°F might cause the compound to dry too quickly, resulting in cracks and an uneven surface. Maintaining the environment within this specific temperature range allows for optimal working conditions, ensuring that the joint compound sets properly and that the final results meet professional standards.