Core TradesQuestion 62 of 700
After stripping the forms from a concrete wall, the contractor finds voids with exposed coarse aggregate and no paste in several areas near the base. This honeycombing was MOST likely caused by:
a.Too much cement in the mix
b.Excessive curing water
c.Insufficient consolidation and/or a mix too stiff to flow around the rebar
d.Using an air-entraining admixture
Explanation
Honeycombing is voids where mortar failed to fill between coarse aggregate particles, typically from poor vibration/consolidation, congested reinforcement, or a mix too stiff to flow. Excess cement or air entrainment does not create these voids, and curing water is applied after stripping.
Law Reference: 2025 CA Building Code, Chapter 19 (Concrete)Practice all 700 questions free — no signup required.
Related questions on this topic
- A level is set up and a backsight of 5.20 feet is read on a benchmark at elevation 100.00 feet. A foresight of 3.40 feet is then read on a new point. What is the elevation of the new point?
- During site grading, best management practices such as silt fences and fiber rolls are installed PRIMARILY to:
- A slab-on-grade develops a network of random, map-like surface cracks within days of placement, but the cracks are shallow and do not reach the reinforcement. What is the MOST likely cause?
- A large slab pour is interrupted for 3 hours when the concrete supply is delayed. When placement resumes, a visible line forms where fresh concrete meets the partially set concrete. This cold joint is BEST prevented in future pours by:
- Fresh concrete is being placed into a tall wall form at a high rate on a cool day. The crew is concerned about lateral pressure on the forms. Which factor will MOST increase the lateral concrete pressure on the formwork?
- In a post-tensioned slab, the primary function of the tendons is to:
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB General Building (B) Trade Examination · How we review