CPI CPI Material Selection & Specifications

Question 1

When selecting fasteners for an outdoor installation in a coastal US environment, which material is most appropriate?

Accepted Answer

Galvanized or stainless steel

Answer

Galvanized or stainless steel fasteners resist salt-air corrosion required for coastal outdoor installations.

Question 2

Which specification sheet provides the manufacturer's recommended installation conditions and material limitations for a product?

Accepted Answer

Technical data sheet (TDS)

Answer

The technical data sheet (TDS) specifies performance parameters, application conditions, and material limitations set by the manufacturer.

Question 3

A CPI installer must choose between PVC conduit and EMT conduit for an indoor dry location. Which factor most often drives the selection?

Accepted Answer

Cost and ease of bending

Answer

Cost and ease of bending are the primary practical factors when choosing between PVC and EMT conduit in indoor dry locations.

Question 4

What does the term 'UL Listed' indicate on a product label used in a US installation?

Accepted Answer

Underwriters Laboratories tested it to applicable safety standards

Answer

UL Listed means Underwriters Laboratories has tested the product and found it meets specific safety standards applicable to its intended use.

Question 5

When reading a material specification calling for '16-gauge sheet metal,' which gauge represents a THICKER material?

Accepted Answer

14 gauge

Answer

In the US sheet metal gauge system, a lower gauge number means thicker material, so 14 gauge is thicker than 16 gauge.

(CPI) Certified Professional Installer Practice Test