BCE Bachelor of Civil Engineering 3

Question 1

In reinforced concrete design (ACI 318), the minimum concrete cover for reinforcement in a slab exposed to weather is typically:

Accepted Answer

1.5 inches

Answer

ACI 318 requires 1.5 inches of cover for slabs, walls, and joists not exposed to weather when bar size is #5 or smaller.

Question 2

Which hydrograph method estimates the runoff response of a watershed to a unit rainfall excess?

Accepted Answer

Unit hydrograph method

Answer

The unit hydrograph represents the direct runoff hydrograph resulting from one inch of rainfall excess uniformly distributed over the watershed.

Question 3

Mohr's circle is used in structural and geotechnical engineering to graphically determine:

Accepted Answer

Principal stresses and shear stresses at a point

Answer

Mohr's circle graphically represents the state of stress at a point, allowing determination of principal stresses and maximum shear stress.

Question 4

A retaining wall that relies on its own weight to resist overturning is called a:

Accepted Answer

Gravity retaining wall

Answer

Gravity retaining walls use their large self-weight (mass) to resist the lateral earth pressure without relying on reinforcement.

Question 5

In open channel hydraulics, critical flow occurs when the Froude number equals:

Accepted Answer

1.0

Answer

At critical flow, Fr = 1, indicating the flow transitions between subcritical (Fr < 1) and supercritical (Fr > 1) regimes.

BCE - Bachelor of Civil Engineering Practice Test