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
Which type of retaining wall relies primarily on its own weight to resist overturning and sliding?
Answer: Gravity retaining wall
Gravity walls use the mass of the wall material (concrete, stone, or gabion) to resist earth pressure without significant bending action.
In traffic engineering, Level of Service (LOS) 'F' on a signalized intersection means:
Answer: Breakdown flow with demand exceeding capacity
LOS F represents forced or breakdown flow where arrival demand exceeds intersection capacity, causing overflow queues and unacceptable delay.
The Dupuit assumption in groundwater flow analysis states that:
Answer: Flow lines are horizontal and hydraulic gradient equals the slope of the water table
Dupuit's assumption simplifies unconfined aquifer analysis by assuming equipotential lines are vertical and flow is essentially horizontal.
Which welding defect is most commonly detected using radiographic (X-ray) testing?
Answer: Internal porosity and inclusions
Radiographic testing excels at detecting internal volumetric defects such as porosity, slag inclusions, and incomplete fusion within the weld.
The Darcy-Weisbach equation in pipe flow relates head loss to:
Answer: Flow velocity, pipe diameter, friction factor, and pipe length
Darcy-Weisbach: h_f = f(L/D)(V²/2g), linking friction head loss to the friction factor, pipe length-to-diameter ratio, and velocity head.
In structural steel design (AISC LRFD), the design strength is expressed as:
Answer: φRn ≥ Ru
LRFD requires that the factored resistance (φRn) equals or exceeds the factored load demand (Ru), where φ is the resistance factor.
A proctor compaction test determines the relationship between soil moisture content and:
Answer: Dry unit weight
The Proctor test plots dry unit weight versus moisture content to find the optimum moisture content for maximum dry density.