Abrasive Blaster C7 Exam
Question 1. What is the primary purpose of abrasive blasting in surface
preparation?
A) To change the color of the surface
B) To increase the temperature of the substrate
C) To remove contaminants and create a suitable profile for coating
adhesion
D) To make the surface shiny
Answer: C
Explanation: Abrasive blasting removes surface contaminants like rust
and old coatings while creating an anchor profile that allows coatings to
adhere properly and last longer.
Question 2. Which surface contaminant is often invisible but can cause
coating failure if not removed?
A) Dust
B) Soluble salts
C) Paint chips
D) Sand
Answer: B
Explanation: Soluble salts are often invisible but can absorb moisture
and cause coatings to blister or fail if not properly removed.
