Which statement about dust applications is false?

Which statement about dust applications is false?

• A. It is typically applied with simple equipment.
• B. It can drift off target during application.
• C. It leaves a visible film on surfaces.
• D. It leaves no residue on surfaces.

Answer: (D)

Dust applications use dry powders that are blown or puffed into cracks, voids, and along surfaces. Because these powders settle from the air, they can travel with air currents and drift off target during application. The powder stays where it lands, so it often leaves a visible film or residue on surfaces and in treated areas. That residual presence is a normal part of how dust formulations work, and it helps extend control in the treated spaces. So the statement claiming there is no residue on surfaces is the false one—dusts inherently leave some residue. The other statements are consistent with how dusts are typically applied: using simple equipment like bellows or dusters, the potential to drift, and the tendency to leave a visible film on surfaces.

Dust applications use dry powders that are blown or puffed into cracks, voids, and along surfaces. Because these powders settle from the air, they can travel with air currents and drift off target during application. The powder stays where it lands, so it often leaves a visible film or residue on surfaces and in treated areas. That residual presence is a normal part of how dust formulations work, and it helps extend control in the treated spaces. So the statement claiming there is no residue on surfaces is the false one—dusts inherently leave some residue. The other statements are consistent with how dusts are typically applied: using simple equipment like bellows or dusters, the potential to drift, and the tendency to leave a visible film on surfaces.