CPC Construction Methods & Materials Flashcards
6 cards from real CPC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CPC Construction Methods & Materials flashcards as text
What is the minimum cover requirement for reinforcing steel in a concrete slab exposed to weather, per ACI 318?
Answer: 1.5 inches
ACI 318 requires a minimum of 1.5 inches of concrete cover for reinforcement in slabs exposed to weather for #5 bars and smaller.
Which excavation method uses a slurry-filled trench to maintain stability while installing a concrete diaphragm wall?
Answer: Slurry wall (diaphragm wall) construction
Slurry wall construction maintains trench stability using bentonite slurry as concrete is placed by tremie, creating a continuous subsurface wall.
In timber construction, what does the term 'dressed lumber' mean?
Answer: Lumber surfaced smooth on one or more faces
Dressed lumber has been surfaced (planed) on one or more faces at the mill to achieve smooth, uniform dimensions.
What is the purpose of using a geosynthetic reinforcement layer within a highway embankment?
Answer: Increase tensile resistance and prevent embankment failure
Geosynthetic reinforcement adds tensile strength to embankment fill, increasing stability and allowing steeper slopes or use of weaker soils.
Which welding process uses a continuously fed wire electrode and a shielding gas to protect the weld pool?
Answer: Gas metal arc welding (GMAW/MIG)
GMAW (MIG welding) uses a continuously fed consumable wire electrode and an externally supplied shielding gas to protect the molten weld pool.
What does a penetration resistance (N-value) from a Standard Penetration Test (SPT) primarily indicate?
Answer: Relative density and consistency of in-situ soil
The SPT N-value reflects the number of blows required to drive a sampler 12 inches, indicating soil density, consistency, and bearing capacity.