Installation Techniques & Procedures Flashcards
7 cards from real CPI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Installation Techniques & Procedures flashcards as text
When splicing two sections of load-bearing unistrut channel, what is required to maintain structural integrity?
Answer: Use a listed splice plate or fitting with proper fasteners torqued to specification
Listed splice plates engineered for strut channel distribute load across the joint and maintain the rated load capacity of the assembly.
A customer reports a newly installed shelf is level when empty but sags under load. What is the most likely cause?
Answer: Bracket spacing is too wide for the shelf material and load
Insufficient bracket spacing relative to shelf material thickness and expected load causes deflection; adding intermediate brackets resolves the issue.
What is the purpose of leaving a 1/8-inch expansion gap between butted panels during installation?
Answer: To accommodate thermal expansion and prevent buckling or warping
All materials expand and contract with temperature changes; gap spacing prevents panels from pushing against each other and buckling.
When running exposed EMT conduit outdoors, which installation requirement must be met at each connection?
Answer: Use raintight (weatherproof) fittings rated for wet locations
Wet location-rated raintight fittings are required by the NEC for outdoor EMT runs to prevent moisture entry and corrosion.
What is the most effective technique for pulling wire through a long conduit run with multiple bends?
Answer: Apply listed wire-pulling lubricant and use a fish tape or pull string with a pull grip
Pull lubricant reduces friction at bends while a fish tape and pull grip distribute pulling force to prevent insulation damage on long runs.
A technician is installing a heavy piece of equipment and discovers the concrete floor is uneven. What is the correct procedure?
Answer: Shim under legs to level and secure, then anchor to floor
Equipment must be leveled with appropriate shims before anchoring so that the base and structure are not stressed by uneven support points.
Which step is critical when installing a cable through a grommet in a metal panel to protect cable integrity?
Answer: Ensure the grommet fully covers the metal edge and is seated flush in the knockout
A properly seated grommet creates a smooth protective barrier between the cable insulation and sharp metal edges, preventing abrasion damage.