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FE Civil / Exam simulator3:42:18

Question 37 / 110Mark for review

Geotechnical engineering

A soil deposit has a water table 2 m below ground. Determine the effective vertical stress at a depth of 4 m.

γ = 18 kN/m³γ_sat = 20 kN/m³γ_w = 9.81 kN/m³

A36.0 kPa

B56.4 kPa

C76.0 kPa

D95.6 kPa

Answer saved

Reference handbook

effective stress1 / 3

SOIL MECHANICS

Effective stress

σ′ = σ − u

σTotal vertical stressuPore water pressure

Ground surface

γ = 18 kN/m³2 m

Water table

γ_sat = 20 kN/m³2 m

Depth = 4 m

Section 1

31323334353637383940

PreviousReview questionsNext question

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FE Civil · Practice exam2:41:07 left

Question 62 / 110Mark for review

Statics

A simply supported beam spans 6 m and carries a 24 kN point load at midspan. What is the maximum bending moment?

A18 kN·mB24 kN·mC36 kN·mD72 kN·m

Section 2

5657585960616263646566676869707172737475

Scheduled break taken

PassFEPE

Practice · HydraulicsQuestion 4 of 12

Open-channel flow · Numeric entry

A rectangular channel 3 m wide carries 6 m³/s at a flow depth of 1.2 m. Find the mean velocity.

Hint 1 of 2The flow area of a rectangular channel is its width times the depth.

1.67m/sCorrect

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Your study planFE Civil

Up next, based on your last 180 answers

Fluid mechanicsAccuracy is 54% over 26 questions12 questions
Geotechnical engineeringSlower than your exam pace10 questions
StaticsNot practiced in two weeks8 questions

PassFEPE

Worked solutionQuestion 4 of 12

Correct. Your answer: 1.67 m/s

1
Find the flow areaA = b · y = 3 m × 1.2 m = 3.6 m²
2
Apply continuityV = Q / A = (6 m³/s) / (3.6 m²)
3
Solve for velocityV = 1.67 m/s

Why 5.00 m/s is temptingDividing the flow by the depth alone skips the channel width.

PassFEPE

Reference handbookYour PDF

manning2 of 5

Mathematics
Statics
Fluid mechanics
Hydraulics
Geotechnical
Structural

Open-channel flowManning’s equation

V = (K/n) R^2/3 S^1/2

K: 1.0 for SI units, 1.486 for USCS
n: Manning roughness coefficient
R: Hydraulic radius, A / P
S: Slope of the energy grade line

PassFEPE

ProgressFE Civil

71%Accuracy2:48Pace per question412Questions answered

Statics86%
Mathematics and statistics78%
Structural analysis69%
Fluid mechanics54%
Geotechnical engineering48%

FE & PE exams mapped: —
Knowledge areas covered: —
Practice problems available: —
Exams with practice problems: —

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Find your FE or PE exam and explore its NCEES knowledge areas. Choose an available practice set to get started.

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FE Civil / Exam simulator3:42:18

Question 37 / 110Mark for review

Geotechnical engineering

A soil deposit has a water table 2 m below ground. Determine the effective vertical stress at a depth of 4 m.

γ = 18 kN/m³γ_sat = 20 kN/m³γ_w = 9.81 kN/m³

A36.0 kPa

B56.4 kPa

C76.0 kPa

D95.6 kPa

Answer saved

Reference handbook

effective stress1 / 3

SOIL MECHANICS

Effective stress

σ′ = σ − u

σTotal vertical stressuPore water pressure

Ground surface

γ = 18 kN/m³2 m

Water table

γ_sat = 20 kN/m³2 m

Depth = 4 m

Section 1

31323334353637383940

PreviousReview questionsNext question

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Everything for your FE or PE prep, in one place.

Practice problems, timed exams, and a study plan that fits around work and classes.

Timed practice exams

Sit a full mock exam on a real clock, with the scheduled break and tools to mark and review questions before submitting.

Practice problems

Exam-style problems for every knowledge area, in multiple choice, multiple correct and fill-in-the-blank formats. Pick the topics and the length.

Tailored study plan

Your results decide what comes next. We rank the topics that need you most and size a set for each one.

Step-by-step solutions

Every problem has a worked solution, so you see why the right answer works and what made the others tempting.

Your reference handbook

Bring your handbook PDF. Search it, jump between sections, and keep it open beside every question.

Progress by topic

Track accuracy in every knowledge area, and your pace against the exam clock, so each session goes where it counts.

PassFEPE

FE Civil · Practice exam2:41:07 left

Question 62 / 110Mark for review

Statics

A simply supported beam spans 6 m and carries a 24 kN point load at midspan. What is the maximum bending moment?

A18 kN·mB24 kN·mC36 kN·mD72 kN·m

Section 2

5657585960616263646566676869707172737475

Scheduled break taken

PassFEPE

Practice · HydraulicsQuestion 4 of 12

Open-channel flow · Numeric entry

A rectangular channel 3 m wide carries 6 m³/s at a flow depth of 1.2 m. Find the mean velocity.

Hint 1 of 2The flow area of a rectangular channel is its width times the depth.

1.67m/sCorrect

PassFEPE

Your study planFE Civil

Up next, based on your last 180 answers

Fluid mechanicsAccuracy is 54% over 26 questions12 questions
Geotechnical engineeringSlower than your exam pace10 questions
StaticsNot practiced in two weeks8 questions

PassFEPE

Worked solutionQuestion 4 of 12

Correct. Your answer: 1.67 m/s

1
Find the flow areaA = b · y = 3 m × 1.2 m = 3.6 m²
2
Apply continuityV = Q / A = (6 m³/s) / (3.6 m²)
3
Solve for velocityV = 1.67 m/s

Why 5.00 m/s is temptingDividing the flow by the depth alone skips the channel width.

PassFEPE

Reference handbookYour PDF

manning2 of 5

Mathematics
Statics
Fluid mechanics
Hydraulics
Geotechnical
Structural

Open-channel flowManning’s equation

V = (K/n) R^2/3 S^1/2

K: 1.0 for SI units, 1.486 for USCS
n: Manning roughness coefficient
R: Hydraulic radius, A / P
S: Slope of the energy grade line

PassFEPE

ProgressFE Civil

71%Accuracy2:48Pace per question412Questions answered

Statics86%
Mathematics and statistics78%
Structural analysis69%
Fluid mechanics54%
Geotechnical engineering48%

Make exam day
feel familiar.

Get comfortable with the rhythm of a computer-based exam, from finding a formula to knowing when to move on.

Questions and your reference handbook, side by side

A realistic exam clock and scheduled break

Mark questions for review and return with a fresh eye

Explore the simulator

Bring your own reference handbook PDF. We’ll give it a place beside your questions.

Built by engineers who have passed the FE, PE, and SE on their first try.

Everything for your FE or PE prep, in one place.

Your discipline. Your next step.

Make exam dayfeel familiar.

One session closerto what comes next.

Built by engineers who have passed the FE, PE, and SE on their first try.

Everything for your FE or PE prep, in one place.

Your discipline. Your next step.

Make exam dayfeel familiar.

One session closerto what comes next.

Make exam day
feel familiar.

One session closer
to what comes next.

Make exam day
feel familiar.

One session closer
to what comes next.