ME or MEng Master of Engineering Master of Civil Engineering 4 — Questions and Answers
Question 1: The Water Quality Index (WQI) for drinking water typically incorporates parameters such as:
- pH, turbidity, dissolved oxygen, coliform, and heavy metals (Correct answer)
- BOD, COD, and suspended solids only
- Temperature and flow velocity only
- Nitrate and phosphorus only
Correct answer: pH, turbidity, dissolved oxygen, coliform, and heavy metals
WQI aggregates multiple parameters including pH, turbidity, DO, total coliforms, and chemical concentrations into a single composite score.
Question 2: In reinforced concrete design per ACI 318, the strength reduction factor φ for shear is:
- 0.90
- 0.75 (Correct answer)
- 0.65
- 0.70
Correct answer: 0.75
ACI 318 specifies φ = 0.75 for shear and torsion, reflecting greater uncertainty in shear failure modes compared to flexure (φ = 0.90).
Question 3: Which geosynthetic material is primarily used to separate subgrade soils from aggregate base layers in road construction?
- Geomembrane
- Geogrid
- Geotextile (Correct answer)
- Geocomposite drain
Correct answer: Geotextile
Geotextiles act as filters and separators, preventing fine subgrade particles from migrating into the aggregate base while allowing drainage.
Question 4: The concept of 'LID' (Low Impact Development) in stormwater management focuses on:
- Maximizing runoff collection in large detention ponds
- Mimicking pre-development hydrology through infiltration, retention, and evapotranspiration (Correct answer)
- Installing large underground vaults for storage
- Increasing impervious cover for rapid conveyance
Correct answer: Mimicking pre-development hydrology through infiltration, retention, and evapotranspiration
LID replicates natural hydrologic processes using bioretention, green roofs, permeable pavement, and rain gardens to reduce runoff volume and peak flows.
Question 5: In highway geometric design, stopping sight distance (SSD) is most directly a function of:
- Pavement width and number of lanes
- Design speed, reaction time, and braking deceleration (Correct answer)
- Superelevation rate and curve radius
- Posted speed limit and lane markings
Correct answer: Design speed, reaction time, and braking deceleration
SSD = vt + v²/(2a), combining the distance traveled during perception-reaction time and the braking distance based on vehicle speed and deceleration.
Question 6: Which type of foundation is most appropriate when a structure must transfer loads through weak surface soils to a deep bearing stratum?
- Spread footing
- Mat foundation
- Driven pile or drilled shaft (Correct answer)
- Combined footing
Correct answer: Driven pile or drilled shaft
Deep foundations such as piles or drilled shafts bypass weak near-surface soils to mobilize end bearing or skin friction in competent deeper strata.
Question 7: The 'method of sections' in truss analysis is most efficient when:
- Finding all member forces simultaneously
- Solving for forces in only a few specific members (Correct answer)
- Analyzing indeterminate trusses
- Verifying deflections at truss joints
Correct answer: Solving for forces in only a few specific members
Cutting through no more than three members and applying equilibrium allows direct calculation of specific member forces without solving the entire truss.
ME or MEng Master of Engineering Master of Civil Engineering 4
The Water Quality Index (WQI) for drinking water typically incorporates parameters such as: