PE Civil Engineering: Structural Practice Exam - Quiz 02

Question 1 of 10

1. Question

A drainage basin creates a 25.0 acre-ft amount of stormwater runoff that must be drained into a rectangular channel that is 4 ft. wide and 2 ft. deep and has a 0.2 percent uniform slope. Assume a coefficient of Manning roughness of 0.022 and a steady flow depth of 1.5 ft. The nearest time (hours) it will take to discharge the runoff is:

18.5 hours
16 hours
20 hours
13 hours

Question 2 of 10

2. Question

Two 12-in identical. Storm sewers flow fully into a junction box at a 2 percent slope. A single, wider pipe flows out of the box with the same material and slope. Assuming the sizes of the flow pipes are commercially available, the minimum size of this downstream pipe (in.) built for maximum flow is almost:

Assuming the sizes of the flow pipes are commercially available, the minimum size of this downstream pipe (in.) built for maximum flow is almost 16 in.
Assuming the sizes of the flow pipes are commercially available, the minimum size of this downstream pipe (in.) built for maximum flow is almost 17 in.
Assuming the sizes of the flow pipes are commercially available, the minimum size of this downstream pipe (in.) built for maximum flow is almost 20 in.
Assuming the sizes of the flow pipes are commercially available, the minimum size of this downstream pipe (in.) built for maximum flow is almost 24 in.

Question 3 of 10

3. Question

What is the average mean of the following precipitation? 2.1, 3.6, 1.3, 1.5, 2.6, 6.1, 5.1, 4.8, 4.1, 2.8, and 3.0.

3.4 in.
2.5 in.
3.0 in.
34.0 in.

Question 4 of 10

4. Question

A drainage ditch of stormwater with a maximum capacity of 10 CFS discharges to a detention basin. The capacity of the detention basin is 400.000 al. The total discharge to the retention basin during a storm event was 1.5 CFS. The most probable time (hours) to fill the empty basin will be:

9.9 hours
2.5 hours
10.1 hours
20 hours

Question 5 of 10

5. Question

In a 1,650-ft section of 3-ft-diameter tubing, assume maximum turbulent flow. 0.0115 is the Darcy-Weisbach friction factor f. The energy grade line above the section has a 5-ft drop. Most possibly, the flow rate (CFS) is:

50
70
80
300

Question 6 of 10

6. Question

For proper soil classification using the Unified Soil Classification or the AASHTO Soil Classification system, the most important requirements are:

For proper soil classification using the Unified Soil Classification or the AASHTO Soil Classification system, the most important requirements are grain-size distribution and Atterberg limits.
For proper soil classification using the Unified Soil Classification or the AASHTO Soil Classification system, the most important requirements are soil density and water content.
For proper soil classification using the Unified Soil Classification or the AASHTO Soil Classification system, the most important requirements are water content and grain-size distribution.
For proper soil classification using the Unified Soil Classification or the AASHTO Soil Classification system, the most important requirements are water content.

Question 7 of 10

7. Question

The basic penetration test is commonly used to obtain which of the following as an easy and economic means of?

The N-value norm penetration test gives an indicator of the relative cohesionless density of soils.
The N-value norm penetration test gives a measurement of the soil compressibility in terms of a compression index.
The N-value norm penetration test gives a direct measurement of undrained soil.
The N-value norm penetration test gives an indirect measurement of the angle of external friction.

Question 8 of 10

8. Question

A 12=-ft x 20-ft concrete slab has to be moved at night time in a temperature of 50°F. The minimum compressive strength is 3,500 psi. What should the concrete mix most likely be made of?

Early strength concrete is needed with a minimum strength of 3,500 psi with type 3 cement and chemical accelerators.
Early strength concrete is needed with a minimum strength of 3,500 psi with sand, type 2 cement, coarse aggregate, water, and chemical accelerator.
Early strength concrete is needed with a minimum strength of 3,500 psi with sand, type 3 cement, coarse aggregate, and chemical accelerator.
Early strength concrete is needed with a minimum strength of 3,500 psi with sand, type 4 cement, fine aggregate, water, and chemical accelerator.

Question 9 of 10

9. Question

What causes steel fatigue?

Steel fatigue can indeed be caused by a reduction in strength due to cyclical loads.
Steel fatigue can indeed be caused by distortion under loads.
Steel fatigue can indeed be caused by overload.
Steel fatigue can indeed be caused by corrosion.

Question 10 of 10

10. Question

Which statement is incorrect?

Rushing erosion is a classification of stormwater erosion.
Rill erosion is a classification of stormwater erosion.
Gully erosion is a classification of stormwater erosion.
Sheet erosion is a classification of stormwater erosion.

PE Civil Engineering: Structural Practice Exam – Quiz 02

Quiz-summary

Information

Results

Categories