PracticeVideosBlogFlashcardsEspañol
All Practice Exams

Free Practice Questions for Bac F4 Niger

Exam-style questions and explanations by OpenExamPrep.

✓ No registration✓ No credit card
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More Niger Baccalauréat

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Baccalauréat Série A4 — Philosophie-Lettres, Option Français (Niger)

Practice Questions

Baccalauréat Série A8 — Philosophie-Lettres, Option Arabe (Niger)

Practice Questions

Baccalauréat Série C — Mathématiques et Sciences Physiques (Niger)

Practice Questions

Baccalauréat Série D — Mathématiques et Sciences de la Nature (Niger)

Practice Questions

Baccalauréat Série E — Mathématiques et Techniques (Niger)

Practice Questions

Baccalauréat Série F1 — Construction Mécanique (Niger)

Practice Questions
Exam Review

Key Facts: Bac F4 Niger Exam

OBEECS

The national authority managing technical and general Baccalauréat exams in Niger

Office du Baccalauréat du Niger (obeecsniger.com)

3–6 hours

Duration range of the official F4 technical papers reviewed

OBEECS official past papers

Free independent practice for Niger's Baccalauréat Série F4 (Génie Civil): English-language MCQs covering structural mechanics, shear force and bending moment diagrams, reinforced concrete design, foundation engineering, quantity takeoff (avant-métré), unit price buildup, topographic leveling, and site safety.

Sample Bac F4 Niger Practice Questions

Try these sample questions to review concepts for the Bac F4 Niger exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A simply supported horizontal beam of span L = 6 m carries a uniformly distributed load q = 10 kN/m over its entire length. What is the vertical reaction at each support (RA and RB)?
A.RA = RB = 30 kN
B.RA = RB = 60 kN
C.RA = RB = 15 kN
D.RA = 40 kN, RB = 20 kN
Explanation: The total vertical load on the beam is Q = q * L = 10 kN/m * 6 m = 60 kN. Due to symmetry, the load divides equally between the two supports: RA = RB = Q / 2 = 60 / 2 = 30 kN.
2For the simply supported beam of span L = 6 m under uniformly distributed load q = 10 kN/m, what is the maximum bending moment Mmax at midspan?
A.90 kN·m
B.45 kN·m
C.60 kN·m
D.30 kN·m
Explanation: For a simply supported beam with uniformly distributed load q across span L, the maximum bending moment at midspan (x = L/2) is Mmax = (q * L²) / 8. Substituting q = 10 kN/m and L = 6 m: Mmax = (10 * 36) / 8 = 360 / 8 = 45 kN·m.
3In a pin-jointed plane truss (treillis articulé), what characterizes a zero-force member (barre nulle) when two non-collinear members meet at an unloaded node?
A.Both members carry equal tension forces of magnitude 10 kN
B.One member carries all the compressive stress while the other buckles
C.Both members must carry zero internal force (N = 0) to satisfy nodal equilibrium
D.The node experiences an infinite bending moment
Explanation: Applying static equilibrium (Sigma Fx = 0, Sigma Fy = 0) at an unloaded two-member node where the members are not collinear shows that neither member can balance the other's transverse component. Therefore, the axial forces in both members must be strictly zero.
4In structural concrete design according to BAEL 91, what are the characteristic design values for the ultimate limit state (ELU) partial safety factors for concrete (gamma_b) and steel (gamma_s) under standard persistent combinations?
A.gamma_b = 1.15 and gamma_s = 1.5
B.gamma_b = 1.0 and gamma_s = 1.0
C.gamma_b = 2.0 and gamma_s = 1.5
D.gamma_b = 1.5 and gamma_s = 1.15
Explanation: For the BAEL ultimate-limit-state data used in the official paper reviewed, the material safety factor is gamma_b = 1.5 for concrete and gamma_s = 1.15 for reinforcing steel. Applying those factors gives the design strengths used in the subsequent footing calculation.
5What is the elastic section modulus (module de résistance à la flexion) Wel_z of a rectangular reinforced concrete cross-section of width b = 20 cm and total depth h = 50 cm about its neutral axis?
A.8,333 cm³
B.41,667 cm⁴
C.5,000 cm³
D.25,000 cm³
Explanation: For a rectangular cross-section, the second moment of area is I_z = (b * h³) / 12. The elastic section modulus is Wel = I_z / (h/2) = (b * h²) / 6. Substituting b = 20 cm and h = 50 cm: Wel = (20 * 50²) / 6 = (20 * 2,500) / 6 = 50,000 / 6 ≈ 8,333.3 cm³.
6What is the slenderness ratio (élancement mécanique) lambda of a circular column of diameter d = 20 cm and buckling length Lk = 3.5 m?
A.lambda = 35
B.lambda = 70
C.lambda = 17.5
D.lambda = 140
Explanation: The radius of gyration i of a solid circular section is i = sqrt(I / A) = sqrt((pi * d^4 / 64) / (pi * d² / 4)) = d / 4. For d = 20 cm = 0.20 m, i = 0.20 / 4 = 0.05 m = 5 cm. The slenderness ratio is lambda = Lk / i = 3.5 m / 0.05 m = 70.
7In reinforced concrete beam design under positive bending (moment fléchissant positif), where should the primary longitudinal tensile steel reinforcement (armatures tendues) be placed?
A.At the exact center of gravity of the cross-section along the neutral axis
B.At the top of the beam cross-section exclusively
C.At the bottom of the beam cross-section, where tensile stresses develop
D.Around the exterior of the beam as diagonal stirrups only
Explanation: Under positive sagging bending moments (travée), the top fibers are in compression and the bottom fibers are in tension. Because plain concrete has low tensile strength (~10% of compressive strength), longitudinal steel reinforcement must be placed in the lower tensile zone to absorb tensile forces.
8What is the shear force V at the midpoint of a simply supported symmetrical beam of span L carrying a uniformly distributed load q?
A.V = (q * L) / 4
B.V = (q * L) / 2
C.V = q * L
D.V = 0
Explanation: The shear force equation is V(x) = RA - q * x = (q * L / 2) - q * x. At midspan (x = L / 2): V(L/2) = (q * L / 2) - q * (L / 2) = 0. Because shear force is the derivative of bending moment (V = dM/dx), the point where V = 0 corresponds to the maximum bending moment.
9A reinforced-concrete beam develops inclined cracks near a support, and its longitudinal compression bars also need lateral restraint. Which reinforcement addresses both needs?
A.Resisting diagonal tensile stresses caused by shear force and tying longitudinal bars together to prevent buckling
B.Absorbing primary longitudinal tensile bending stresses at midspan
C.Providing a decorative finish to the exterior concrete face
D.Reducing the dead weight of the concrete beam
Explanation: Transverse reinforcement (stirrups, ties, and hoops) resists shear forces by bridging across diagonal 45° shear cracks, preventing sudden brittle diagonal tension shear failure, while maintaining the spacing and buckling stability of longitudinal compression bars.
10In a cantilever beam of length L carrying a concentrated load F at its free end, where does the maximum bending moment occur?
A.At the free end, with magnitude Mmax = F * L
B.At the fixed support (encastrement), with magnitude Mmax = F * L
C.At the exact midpoint, with magnitude Mmax = (F * L) / 2
D.The bending moment is constant across the entire span
Explanation: Taking moments about a section at distance x from the fixed support gives M(x) = -F * (L - x). The bending moment increases linearly from zero at the free end (x = L) to a maximum magnitude of Mmax = F * L at the fixed root (x = 0).

About the Bac F4 Niger Exam

Série F4 is Niger's technical secondary baccalauréat specializing in civil engineering, building construction, and public works (BTP), administered by OBEECS under the Ministry of Higher Education. It provides entry to higher education programs in civil engineering, architecture, urban planning, and surveying (BTS Génie Civil, university institutes). This independent bank provides conceptual English-language MCQ practice covering structural analysis, reinforced concrete technology, cost estimating, surveying, and site safety.

Exam sponsor: Office du Baccalauréat, des Équivalences et des Examens et Concours du Supérieur (OBEECS). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

OBEECS's official paper bank lists first-group papers in Mécanique appliquée et RDM, Projet d'exploitation, Dessin, Mathématiques, Français, Anglais, and Arabe. The second group lists Métré et étude de prix, Technologie de construction et matériaux, Législation, Sciences physiques, Mathématiques, and Mécanique appliquée et RDM. The technical papers reviewed are in French.

Time Limit

Official papers reviewed: Mécanique appliquée et RDM 3 hours; Métré et étude de prix 3 hours; Projet d'exploitation 6 hours

Passing Score

Not published in the current OBEECS public materials reviewed; the papers carry subject coefficients.

Exam / Certification Fees

Latest official schedule located (4 April 2024): 2,500 FCFA public-school official; 10,000 FCFA private-school official or independent; 25,000 FCFA foreign candidate. No separate 2026 fee notice was found.

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

25% of this local bank (25 questions)

Applied Mechanics and Structural Analysis

Support reactions, shear force and bending moment diagrams, normal and shear stresses, section properties, truss analysis, and column buckling

25% of this local bank (25 questions)

Construction Technology and Building Materials

Reinforced concrete principles, cement classes, slump test, shallow spread footings and deep piles, masonry bonds, roof structures, and expansion joints

20% of this local bank (20 questions)

Quantity Surveying and Cost Estimation

Avant-métré methods, excavation and backfill volume take-offs, formwork surface calculation, steel reinforcement weight take-off, and unit price components

15% of this local bank (15 questions)

Topography and Site Engineering

Differential leveling, staff readings, altitude computation, slope calculations, contour lines, and structural drawing interpretation

15% of this local bank (15 questions)

Site Management, Hydraulics, and Safety

Site installation planning (PICH), trench shoring, scaffolding standards, PPE, Bernoulli pipe flow, and open-channel stormwater drainage

Preparing for the Bac F4 Niger Exam

What You Need to Know

  • Passing score: Not published in the current OBEECS public materials reviewed; the papers carry subject coefficients.
  • Assessment: OBEECS's official paper bank lists first-group papers in Mécanique appliquée et RDM, Projet d'exploitation, Dessin, Mathématiques, Français, Anglais, and Arabe. The second group lists Métré et étude de prix, Technologie de construction et matériaux, Législation, Sciences physiques, Mathématiques, and Mécanique appliquée et RDM. The technical papers reviewed are in French.
  • Time limit: Official papers reviewed: Mécanique appliquée et RDM 3 hours; Métré et étude de prix 3 hours; Projet d'exploitation 6 hours
  • Exam / certification fees: Latest official schedule located (4 April 2024): 2,500 FCFA public-school official; 10,000 FCFA private-school official or independent; 25,000 FCFA foreign candidate. No separate 2026 fee notice was found. Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Bac F4 Niger: Suggested Study Strategy

1Practise drawing shear force (V) and bending moment (M) diagrams for simply supported beams carrying concentrated and uniformly distributed loads (w * L^2 / 8).
2Master rebar weight calculations: linear mass is given by d^2 / 162 in kg/m (e.g., HA12 is ~0.888 kg/m, HA16 is ~1.58 kg/m).
3Revise the two-peg leveling calculation: difference in height Delta H = backsight (lecture arrière) - foresight (lecture avant).
4Review the components of a construction unit price: Déboursé Sec (DS) = direct materials + direct labour + equipment costs; Cost price (Prix de revient) includes overheads.
5Understand the difference between ultimate limit state (ELU - safety against collapse) and serviceability limit state (ELS - cracking, deflection, durability).

Frequently Asked Questions

Is the Niger Bac F4 exam multiple-choice?

No. The official Série F4 materials reviewed use extended technical calculations, project and quantity-takeoff tasks, and drawing work in French. This bank is an independent English-language MCQ study adaptation, not an official translation or format simulation.

Which official F4 papers were used to check this bank's scope?

The review used OBEECS papers in Mécanique appliquée et RDM, Projet d'exploitation, and Métré et étude de prix, along with the official first- and second-group paper lists. Those papers include truss and footing calculations, excavation productivity and cost, concrete and reinforcement quantities, and drainage-channel takeoffs.

What mathematical and physics competencies are required for Série F4?

Candidates must be proficient in trigonometry (vector resolution, angle computations in surveying), calculus (derivatives for shear-moment relations V = dM/dx, integrals for centroids and moments of inertia), and hydrostatics/hydraulics.