ASE B2 Auto Paint Exam Prep practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q1Technician A says that an HVLP spray gun operates with air cap pressure of 10 PSI or less. Technician B says that HVLP spray guns have higher transfer efficiency than conventional spray guns. Who is right?
✓ Correct answer: D. Both A and B
Both technicians are correct. HVLP (High Volume Low Pressure) spray guns operate with air cap pressure of 10 PSI or less, and they have higher transfer efficiency (65% or more) compared to conventional spray guns.
Q2When spraying metallic basecoat, what happens if the air pressure is set too high?
✓ Correct answer: C. Mottling will occur
When air pressure is set too high while spraying metallic basecoat, the metallic flakes can bounce back, causing mottling. This creates an uneven appearance where the metallic particles are distributed inconsistently.
Q3What is the primary purpose of the air cap on a spray gun?
✓ Correct answer: B. To direct compressed air into the fluid stream to atomize the paint
The primary purpose of the air cap is to direct compressed air into the fluid stream to atomize the paint and shape the spray pattern. It's a critical component that affects the quality of atomization and pattern formation.
Q4Which of the following is NOT a typical adjustment on a spray gun?
✓ Correct answer: A. Viscosity adjustment
A viscosity adjustment is not found on a spray gun. Viscosity is adjusted when mixing the paint, not on the gun itself. Spray guns typically have pattern control, air pressure, and fluid control adjustments.
Q5Technician A says that the fluid needle should be removed before cleaning the spray gun. Technician B says that the air cap should be removed before cleaning the spray gun. Who is right?
✓ Correct answer: D. Both A and B
Both technicians are correct. For proper cleaning, both the fluid needle and air cap should be removed to allow thorough cleaning of all passages and components of the spray gun.
Q6What can happen if a spray gun's fluid tip and needle are mismatched?
✓ Correct answer: C. Improper atomization
If the fluid tip and needle are mismatched, improper atomization will occur because these components are designed to work together as a set. Mismatching can lead to leaking, uneven spray patterns, and poor finish quality.
Q7When using infrared lamps to force-dry paint, which statement is TRUE?
✓ Correct answer: B. They heat the substrate, which then transfers heat to the paint film
Infrared lamps heat the substrate directly, which then transfers heat to the paint film. This is more efficient than heating the air around the vehicle, as it focuses energy where it's needed most.
Q8What spray gun malfunction is indicated when paint is leaking around the fluid needle packing?
✓ Correct answer: A. The packing nut is too loose
When paint is leaking around the fluid needle packing, the packing nut is likely too loose. The packing nut compresses the packing material to create a seal around the needle, and if it's loose, paint will leak through this area.
Q9What should be done to the spray pattern when painting a narrow area such as a door pillar?
✓ Correct answer: D. Adjust it to be narrow/vertical
When painting narrow areas like door pillars, the spray pattern should be adjusted to be narrow/vertical to reduce overspray and ensure proper coverage of the targeted area without wasting material.
Q10Technician A says that UV lamps can be used to cure certain automotive coatings. Technician B says that UV curing typically takes longer than conventional curing methods. Who is right?
✓ Correct answer: C. A only
Technician A is correct. UV lamps can be used to cure certain specialized automotive coatings. Technician B is incorrect because UV curing is actually faster than conventional methods, not slower.
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Theory