CPI Installation Techniques & Procedures 2 — Questions and Answers
Question 1: When installing anchors in hollow walls, which type provides the greatest holding strength?
- Plastic expansion anchor
- Toggle bolt (Correct answer)
- Adhesive anchor
- Nail-in anchor
Correct answer: Toggle bolt
Toggle bolts spread load across a larger area on the back of hollow drywall, providing superior holding strength compared to other hollow-wall anchors.
Question 2: What is the primary purpose of applying a primer before installing adhesive-backed materials?
- To add color consistency
- To improve adhesion by cleaning and sealing the substrate (Correct answer)
- To slow curing time
- To increase material flexibility
Correct answer: To improve adhesion by cleaning and sealing the substrate
Primer cleans the substrate surface, seals porous areas, and chemically prepares it so adhesive-backed materials bond properly.
Question 3: A technician is installing conduit through a fire-rated wall assembly. What is required at the penetration point?
- Standard caulk seal
- Fire-rated intumescent sealant or fire stop collar (Correct answer)
- Foam insulation fill
- Duct tape wrap
Correct answer: Fire-rated intumescent sealant or fire stop collar
Fire-rated penetrations must be sealed with approved intumescent or fire stop products to maintain the wall's fire rating.
Question 4: When using a reciprocating saw to cut through an existing wall, what is the most critical safety step before cutting?
- Wear hearing protection
- Scan for hidden utilities with a stud finder and cable detector (Correct answer)
- Mark the cut line with chalk
- Set blade to maximum speed
Correct answer: Scan for hidden utilities with a stud finder and cable detector
Scanning for hidden electrical wires, pipes, and structural members before cutting prevents injury and property damage.
Question 5: Which fastener installation technique is recommended when driving screws into hardwood near the edge to prevent splitting?
- Drive screws without pre-drilling
- Pre-drill a pilot hole slightly smaller than the screw shank (Correct answer)
- Use a larger gauge screw
- Apply heat to the wood first
Correct answer: Pre-drill a pilot hole slightly smaller than the screw shank
Pre-drilling relieves wood fiber stress and prevents splitting when fastening near edges or ends of hardwood.
Question 6: When installing surface-mount raceway on a baseboard, what technique ensures a professional finish at corners?
- Overlap the pieces and secure with extra screws
- Use factory corner fittings or miter-cut the raceway at 45 degrees (Correct answer)
- Apply caulk to fill the gap
- Leave a small gap for expansion
Correct answer: Use factory corner fittings or miter-cut the raceway at 45 degrees
Factory corner fittings or precision 45-degree miter cuts ensure tight, clean joints that look professional and prevent debris accumulation.
Question 7: What is the correct procedure for installing a through-bolted connection on a metal panel?
- Drill oversized hole, insert bolt, tighten fully
- Drill correctly sized hole, deburr, insert bolt with washer, torque to specification (Correct answer)
- Weld bolt in place after insertion
- Use adhesive instead of torquing
Correct answer: Drill correctly sized hole, deburr, insert bolt with washer, torque to specification
Correctly sized holes, deburring, proper washers, and torquing to specification ensure the connection meets load requirements without damaging the panel.
CPI Installation Techniques & Procedures 2
When installing anchors in hollow walls, which type provides the greatest holding strength?