Bachelor of Civil Engineering Flashcards
7 cards from real BE/B Eng Bachelor of Engineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Bachelor of Civil Engineering flashcards as text
In soil mechanics, the coefficient of consolidation (Cv) is used to predict:
Answer: The rate at which excess pore water pressure dissipates over time
Cv governs the time-rate of consolidation settlement by describing how quickly pore water drains from compressible soil.
Which mix design parameter primarily controls the strength of hardened concrete?
Answer: Water-to-cement (w/c) ratio
Abrams' law establishes that compressive strength is inversely related to the water-to-cement ratio for fully hydrated concrete.
The Mohr-Coulomb failure criterion for soil defines shear strength as:
Answer: τ = c + σ tan φ
Shear strength equals cohesion (c) plus normal stress (σ) multiplied by the tangent of the internal friction angle (φ).
In highway design, superelevation is applied to horizontal curves primarily to:
Answer: Counteract the centrifugal force on vehicles negotiating the curve
Superelevation tilts the roadway cross-section inward so gravity assists in balancing centrifugal acceleration on the curve.
According to ASTM D1143, the standard load test for deep foundations is the:
Answer: Static axial compressive load test on piles
ASTM D1143 specifies procedures for static axial compressive load testing to determine pile capacity and load-settlement behavior.
What is the Manning's equation used for in hydraulics?
Answer: Estimating flow velocity in open channels
Manning's equation relates open-channel flow velocity to channel geometry, slope, and roughness coefficient (n).
In prestressed concrete, post-tensioning differs from pre-tensioning in that:
Answer: Tendons are stressed after the concrete has hardened
In post-tensioning, ducts are cast into the concrete and tendons are stressed and anchored after the concrete reaches sufficient strength.