Paint Application Equipment Flashcards

What is the primary advantage of an HVLP spray system over a conventional airless sprayer for interior trim painting?

Answer: HVLP achieves 65-85% transfer efficiency with less overspray

HVLP systems atomize paint at low pressure, resulting in 65-85% transfer efficiency compared to 50-65% for conventional airless, significantly reducing overspray.

When selecting an airless spray tip for painting broad exterior walls, what tip size range is most appropriate?

Answer: 517-521 (wide fan, large orifice)

Tips in the 517-521 range provide a 10-12 inch fan width with orifice sizes appropriate for exterior latex paint on broad surfaces.

What maintenance must be performed on an airless sprayer immediately after use with latex paint?

Answer: Flush the system thoroughly with clean water until the discharge runs clear

Latex paint dries quickly and will clog the pump, hose, filter, and tip if not flushed immediately with clean water after each use.

A C-33 contractor needs to apply a smooth finish on interior doors. Which roller nap length is most appropriate?

Answer: 1/4 inch or foam roller

A 1/4-inch nap or foam roller produces the smoothest finish with minimal texture, ideal for doors and cabinets.

What is the purpose of a 'whip hose' attached between the airless sprayer and the spray gun?

Answer: To reduce arm fatigue by providing a lightweight, flexible connection near the gun

A whip hose (3-6 feet of small-diameter, lightweight hose) provides a flexible connection between the main hose and gun, reducing weight and stiffness felt by the operator.

When using an extension pole with a paint roller, what is the recommended technique for maintaining even pressure?

Answer: Apply moderate, consistent pressure and let the roller's weight do the work, keeping the pole at a slight angle

Moderate, consistent pressure with the pole at a slight angle allows the roller to rotate smoothly and deposit paint evenly.