AUTOBODY 84C PRACTICE
EXAM 84 QUESTIONS
Question 1: Before spraying a re�nishing product that contains hazardous isocyanates, what should a technician do �rst?
Choices:
1) Rely on the spray booth �lters alone 2) Review the product SDS and use the speci�ed respiratory and skin protection 3) Wear only safety glasses because the booth removes vapors 4) Reduce air pressure so less protective equipment is needed Correct Answer: Review the product SDS and use the speci�ed respiratory and skin protection Explanation: The product SDS and the shop respiratory-protection program determine the required controls and PPE. Isocyanate-containing coatings can present serious inhalation and skin hazards, so booth ventilation alone is not a substitute for speci�ed respiratory and skin protection.Page 1
Question 2: A technician is using a chemical paint remover on a steel panel. Which practice is most appropriate?
Choices:
1) Use chemical-resistant gloves and eye/face protection speci�ed by the product instructions 2) Use bare hands so contamination can be felt immediately 3) Heat the remover with an open �ame to speed the reaction 4) Mix the remover with lacquer thinner to make it spread farther Correct Answer: Use chemical-resistant gloves and eye/face protection speci�ed by the product instructions Explanation: Chemical strippers can burn skin and damage eyes. The technician should follow the product instructions and SDS, including chemical-resistant gloves and appropriate eye or face protection, and should never use open �ame or unauthorized solvent mixtures.Question 3: A coating system calls for a 4:1:1 mix by volume of color, activator, and reducer. How much of each is needed to make 600 mL of sprayable material?
Choices:
1) 300 mL color, 150 mL activator, 150 mL reducer 2) 400 mL color, 100 mL activator, 100 mL reducer 3) 450 mL color, 75 mL activator, 75 mL reducer 4) 480 mL color, 60 mL activator, 60 mL reducer
Correct Answer: 400 mL color, 100 mL activator, 100 mL reducer
Explanation: The ratio has six total parts: 4 + 1 + 1. Six hundred mL divided by 6 equals 100 mL per part, so the mix is 400 mL color, 100 mL activator, and 100 mL reducer.Page 2
Question 4: Why should a spray booth's air�ow and �lters be checked before a complete re�nish job?
Choices:
1) To make masking tape stick more aggressively 2) To reduce the need for surface cleaning 3) To help control overspray and airborne contamination during spraying 4) To allow paint to be applied without �ash time Correct Answer: To help control overspray and airborne contamination during spraying Explanation: Proper booth air�ow and clean �lters help remove overspray and contaminants and support consistent application. They do not eliminate the need for cleaning, masking, or speci�ed �ash times.Question 5: Which towel practice is best during a �nal solvent or waterborne surface wipe before painting?
Choices:
1) Use a clean lint-free towel appropriate for the cleaner 2) Use the same shop rag used for mechanical work 3) Use a silicone-treated polishing cloth 4) Allow the cleaner to evaporate without wiping
Correct Answer: Use a clean lint-free towel appropriate for the cleaner
Explanation: A clean lint-free towel minimizes �bers and contamination. Reused oily rags and silicone-treated cloths can introduce defects, while many cleaners are designed to be wiped o� rather than simply left to evaporate.Page 3