BE/B Eng Bachelor of Engineering Bachelor of Civil Engineering 4

Question 1

Which type of retaining wall relies primarily on its own weight to resist overturning and sliding?

Accepted Answer

Gravity retaining wall

Answer

Gravity walls use the mass of the wall material (concrete, stone, or gabion) to resist earth pressure without significant bending action.

Question 2

In traffic engineering, Level of Service (LOS) 'F' on a signalized intersection means:

Accepted Answer

Breakdown flow with demand exceeding capacity

Answer

LOS F represents forced or breakdown flow where arrival demand exceeds intersection capacity, causing overflow queues and unacceptable delay.

Question 3

The Dupuit assumption in groundwater flow analysis states that:

Accepted Answer

Flow lines are horizontal and hydraulic gradient equals the slope of the water table

Answer

Dupuit's assumption simplifies unconfined aquifer analysis by assuming equipotential lines are vertical and flow is essentially horizontal.

Question 4

Which welding defect is most commonly detected using radiographic (X-ray) testing?

Accepted Answer

Internal porosity and inclusions

Answer

Radiographic testing excels at detecting internal volumetric defects such as porosity, slag inclusions, and incomplete fusion within the weld.

Question 5

The Darcy-Weisbach equation in pipe flow relates head loss to:

Accepted Answer

Flow velocity, pipe diameter, friction factor, and pipe length

Answer

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.

BE/B Eng Bachelor of Engineering Practice Test