C33 Paint Application Equipment 5

Question 1

What is the function of a 'whip hose' (short flexible hose) at the airless spray gun connection?

Accepted Answer

It reduces vibration and operator fatigue from the rigid high-pressure hose

Answer

A whip hose is a short, flexible section of hose between the main high-pressure line and the spray gun that absorbs vibration and reduces hand fatigue.

Question 2

Which type of spray gun tip is specifically designed to reverse 180° for field cleaning of clogs without removing the tip from the gun?

Accepted Answer

Reversible airless tip (RAC tip)

Answer

Reversible Airless Cartridge (RAC) tips can be rotated 180° so that fluid pressure blows the clog back out through the reversed tip.

Question 3

A painting contractor is applying an elastomeric coating to a concrete block wall. Which application method is most appropriate?

Accepted Answer

Airless spray with a large orifice tip (0.021–0.031) and back-rolling

Answer

Elastomeric coatings are thick, high-build materials that require a large-orifice airless tip, and back-rolling ensures the coating bridges surface voids.

Question 4

What does a 517 airless spray tip designation indicate?

Accepted Answer

10 inch fan width and 0.017 inch orifice

Answer

In a three-digit airless tip number, the first digit multiplied by 2 gives the fan width in inches, and the last two digits give the orifice size in thousandths of an inch — so 517 = 10" fan, 0.017" orifice.

Question 5

When cleaning an airless spray system that was used with latex paint, which solvent should be used for flushing?

Accepted Answer

Warm water followed by pump armor

Answer

Latex paint is water-based, so warm water is used to flush the system, followed by pump armor or mineral spirits to protect seals from drying.

C33 - C-33 California Painting Contractor License Practice Test

C33 - C-33 California Painting Contractor License Practice Test

C33 Paint Application Equipment 5