Materials Selection Flashcards
7 cards from real CFP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Materials Selection flashcards as text
Which factor most significantly determines the appropriate mesh opening size when selecting chain-link for a dog kennel?
Answer: The breed and size of the dog
Mesh opening size must be matched to the animal; smaller dogs and puppies require tighter mesh (e.g., 1-inch) to prevent escape or entrapment of paws and snouts.
A fence contractor is selecting concrete mix for setting posts in an area with repeated freeze-thaw cycles. Which air-entrained mix is the minimum recommendation?
Answer: 4,500 psi with 6–8% air entrainment
In severe freeze-thaw environments, 4,500 psi concrete with 6–8% air entrainment is recommended to resist surface scaling and internal cracking caused by ice expansion.
When specifying aluminum fence pickets for a residential project, what alloy series is most commonly used for extrusions?
Answer: 6000 series (magnesium-silicon alloy)
6000-series aluminum (primarily 6063) is the standard for architectural extrusions, offering an excellent balance of strength, corrosion resistance, and workability.
Which property of bamboo makes it a sustainable but challenging material for permanent fence installations in wet climates?
Answer: It splits and decays rapidly when exposed to sustained moisture
Bamboo is highly susceptible to splitting, fungal decay, and insect attack when persistently wet, limiting its service life in humid or rainy climates without special treatment.
A contractor must install a temporary construction fence on a job site. Which material is the standard choice for this application?
Answer: Portable chain-link panels with weighted bases
Portable chain-link panels with weighted bases or ground stakes are the industry standard for temporary construction site security because they are quickly deployed and relocated without post installation.
What does the designation 'ASTM A392' specify for chain-link fence fabric?
Answer: Zinc-coating weights for galvanized steel chain-link fabric
ASTM A392 is the standard specification that defines the minimum zinc-coating weights for galvanized steel chain-link fence fabric, ensuring corrosion protection quality.
Which characteristic of steel fence posts determines their bending resistance (moment of inertia) most directly?
Answer: The wall thickness and cross-sectional shape
Bending resistance (moment of inertia) is primarily determined by the wall thickness and geometric shape of the cross-section, not coating or material chemistry.