FE Civil Engineering Exam Prep #5

Question 1

A 40.0 gram sample of a radioactive element decays to 5.0 grams in 15 hours. What is the half-life of this element?

Accepted Answer

5 hours

Answer

3 hours

Answer

2 hours

Answer

6 hours

Answer

7.5 hours

Question 2

Which of the following species is classified as an electrolyte?

Accepted Answer

Na+

Answer

CH4

Answer

C6H12O6

Answer

N2

Answer

O3

Question 3

Which of the following elements displays bonding characterized by a delocalized “sea of electrons?”

Accepted Answer

Copper

Answer

Fluorine

Answer

Nitrogen

Answer

Sulfur

Answer

Argon

Question 4

Euler’s Formula is used to determine which of the following properties related to a simply-supported column?

Accepted Answer

Critical buckling load

Answer

Maximum bending moment

Answer

Shear stress

Answer

None of the above

Question 5

The hydraulic radius of a sewer refers to which of the following?

Accepted Answer

The ratio of the cross-sectional area of flow to the wetted perimeter

Answer

The diameter

Answer

Channel perimeter

Answer

One-half the diameter

Question 6

Which of the following is considered to be a basic connection types for beams, columns, trusses, and joists?

Accepted Answer

All of the above

Answer

Answer

Roller

Answer

Fixed

Question 7

When evaluating the progress of a project using the Earned Value Management approach, which of the following cases is a project considered profitable?

Accepted Answer

Actual budget spent is less than or equal to the earned value

Answer

Actual cost is greater than the earned value

Answer

Budgeted cost of work performed is less than the budgeted cost of work scheduled

Answer

A. and C.

Question 8

Which of the following is the correct molecular formula for magnesium phosphate?

Accepted Answer

Mg3(PO4)2

Answer

MgPO4

Answer

Mg(PO4)2

Answer

MgP

Answer

MgP2

Question 9

Which of the following best represents when footings are appropriate to use?

Accepted Answer

Foundation loads can be supported by shallow soils

Answer

Shallow soils are not able to support foundation loads cost-effectively

Answer

Deep, competent soils or bedrock can support the foundation loads

Answer

None of the above

Question 10

For most proposed land development projects, pre- and post-development watershed drainage patterns are typically evaluated to determine if substantial hydrologic alterations are proposed that will result in which of the following?

Accepted Answer

All of the above

Answer

Changes to groundwater recharge

Answer

Changes to water regime within a given resource area

Answer

Increase runoff from the area

A 40.0 gram sample of a radioactive element decays to 5.0 grams in 15 hours.What is the half-life of this element?

A 40.0 gram sample of a radioactive element decays to 5.0 grams in 15 hours.
What is the half-life of this element?