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100+ Free Bac F1 Bénin Practice Questions

Prepare for the Baccalauréat Série F1 (Construction Mécanique) — Bénin exam with instant access — no signup required.

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2026 Statistics

Key Facts: Bac F1 Bénin Exam

Coeff 3 / 6h

Construction Mécanique written paper duration and coefficient

OBB — Liste des épreuves à l'examen du Baccalauréat

Coeff 3 / 8–12h

Mandatory Travaux Pratiques (T.P.) workshop practical examination

OBB — Liste des épreuves à l'examen du Baccalauréat

28 / 560 pts

Total coefficients and points across first and second groups in Série F1

OBB — Liste des épreuves à l'examen du Baccalauréat

58.01%

Série F1 national admissibility rate, June 2026 session

Office du Baccalauréat du Bénin, results proclamation 8 July 2026

10.00 / 20

Passing weighted average (9.00–9.99 qualifies for the second-group oral)

Décret fixing the Baccalauréat rules, Articles 17–18

Free 100-question English MCQ study adaptation for the Benin Baccalauréat Série F1 (Construction Mécanique). The official OBB examination is administered in French and includes 8 written papers (Construction Mécanique coeff 3, Analyse de Fabrication coeff 3, Mathématiques coeff 3, Mécanique coeff 2, Automatique coeff 2, Étude d'Outillage coeff 2, Sciences Physiques coeff 2, Français coeff 2), a mandatory 8–12 hour Travaux Pratiques workshop practical (coeff 3), and a 5-subject second-group oral (coeff 5) for candidates averaging 9.00–9.99/20. Pass mark is a weighted 10.00/20.

Sample Bac F1 Bénin Practice Questions

Try these sample questions to test your Bac F1 Bénin exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In mechanical systems modeling, how many degrees of freedom (degrés de liberté) does an ideal pivot joint (liaison pivot) allow between two rigid bodies?
A.1 rotational degree of freedom and 0 translational degrees of freedom
B.1 translational degree of freedom and 0 rotational degrees of freedom
C.1 rotational and 1 translational degree of freedom
D.2 rotational degrees of freedom and 0 translational degrees of freedom
Explanation: A standard pivot joint (liaison pivot) constrains 5 degrees of freedom (all 3 translations and 2 rotations), leaving exactly 1 degree of freedom: a single rotation about its principal axis. A joint allowing only 1 translation is a sliding joint (liaison glissière).
2What degrees of freedom are eliminated by an ideal planar joint (liaison appui plan) whose normal vector is aligned with the z-axis?
A.Translation Tz and rotations Rx and Ry (3 degrees of freedom eliminated)
B.Translations Tx and Ty and rotation Rz (3 degrees of freedom eliminated)
C.Translations Tx, Ty, and Tz (3 degrees of freedom eliminated)
D.Rotations Rx, Ry, and Rz (3 degrees of freedom eliminated)
Explanation: A planar support joint (liaison appui plan) with a normal along the z-axis prevents linear displacement along z (Tz) as well as tilting rotations around x (Rx) and around y (Ry). The remaining allowed degrees of freedom are translations Tx, Ty and rotation Rz (3 d.d.l. permitted, 3 eliminated).
3Which set of degrees of freedom is permitted by a spherical ball joint (liaison rotule ou sphérique) centered at the origin?
A.3 rotations (Rx, Ry, Rz) and 0 translations
B.3 translations (Tx, Ty, Tz) and 0 rotations
C.1 translation (Tz) and 2 rotations (Rx, Ry)
D.2 translations (Tx, Ty) and 1 rotation (Rz)
Explanation: A spherical joint (liaison rotule) permits 3 angular rotations (Rx, Ry, Rz) about its center while blocking all 3 linear translations (Tx, Ty, Tz). Thus, it has 3 degrees of freedom and 3 degrees of constraint.
4In the ISO system of limits and fits, what type of fit is represented by Ø30 H7/g6?
A.A clearance fit (ajustement avec jeu)
B.An interference fit (ajustement avec serrage)
C.A transition fit (ajustement incertain)
D.A shrink-fit (emmanchement à la presse)
Explanation: In ISO fits, fundamental deviation 'H' for holes has a lower deviation EI = 0. The shaft deviation 'g' lies strictly below the zero line (upper deviation es < 0). Therefore, the maximum shaft diameter is always smaller than the minimum hole diameter, guaranteeing a clearance fit (ajustement avec jeu).
5For an assembly specified as Ø40 H7/p6, the hole tolerance is Ø40 (+0.025 / 0) mm and the shaft tolerance is Ø40 (+0.042 / +0.026) mm. What are the maximum interference (Serrage maxi) and minimum interference (Serrage mini)?
A.Serrage maxi = 0.042 mm, Serrage mini = 0.001 mm
B.Serrage maxi = 0.042 mm, Serrage mini = 0.026 mm
C.Serrage maxi = 0.067 mm, Serrage mini = 0.001 mm
D.Serrage maxi = 0.025 mm, Serrage mini = 0.016 mm
Explanation: Maximum interference occurs when the shaft is at its maximum material condition (MMC = 40.042 mm) and the hole is at its least material condition (LMC = 40.000 mm): Serrage maxi = 40.042 − 40.000 = 0.042 mm (42 µm). Minimum interference occurs when the shaft is at LMC (40.026 mm) and the hole is at MMC (40.025 mm): Serrage mini = 40.026 − 40.025 = 0.001 mm (1 µm).
6A simple spur gear drive consists of a pinion with Z1 = 20 teeth driving a gear with Z2 = 60 teeth. If the pinion rotates at N1 = 1500 rpm, what is the output speed N2 and transmission ratio u = N2/N1?
A.N2 = 500 rpm, u = 1/3
B.N2 = 4500 rpm, u = 3
C.N2 = 500 rpm, u = 3
D.N2 = 750 rpm, u = 1/2
Explanation: The gear speed ratio is u = N2 / N1 = Z1 / Z2 = 20 / 60 = 1/3 ≈ 0.333. The output speed is N2 = N1 · (Z1 / Z2) = 1500 · (20 / 60) = 500 rpm.
7A two-stage compound gear train has driving gears with Z1 = 18 and Z3 = 24 teeth, and driven gears with Z2 = 54 and Z4 = 72 teeth. What is the overall transmission ratio u_global?
A.u_global = 1/9
B.u_global = 1/6
C.u_global = 1/12
D.u_global = 9
Explanation: The overall ratio of a compound gear train is the product of the individual stage ratios: u_global = (Z1 / Z2) · (Z3 / Z4) = (18 / 54) · (24 / 72) = (1/3) · (1/3) = 1/9.
8A worm gear set (engrenage roue et vis sans fin) has a single-start worm (Z_vis = 1) driving a wheel with Z_roue = 40 teeth. Under what condition is this transmission statically self-locking (irréversible)?
A.When the lead angle γ of the worm is smaller than the friction angle φ (tan γ < tan φ)
B.When the lead angle γ of the worm is strictly greater than 45°
C.When the number of starts on the worm is greater than 3
D.When the wheel drives the worm at high speed
Explanation: A worm gear drive is self-locking (irreversible, meaning the wheel cannot drive the worm) when the helix lead angle γ is less than the apparent friction angle φ between the worm thread and wheel teeth (i.e., tan γ < μ). This is typically achieved with a single-start worm having a low lead angle (γ < 5° to 6°).
9An electric motor delivers a mechanical power P = 7.5 kW at a rotational speed N = 1430 rpm. What is the nominal output torque C delivered by the motor shaft?
A.C ≈ 50.1 N·m
B.C ≈ 5.24 N·m
C.C ≈ 315 N·m
D.C ≈ 10.7 N·m
Explanation: Angular velocity is ω = (2 · π · N) / 60 = (2 · π · 1430) / 60 ≈ 149.75 rad/s. Torque is C = P / ω = 7500 W / 149.75 rad/s ≈ 50.08 N·m (approx 50.1 N·m).
10A deep groove radial ball bearing operates under an equivalent dynamic radial load P = 4 kN. Its basic dynamic load rating is C = 20 kN. What is its nominal rating life L10 in millions of revolutions (10^6 rev)?
A.L10 = 125 million revolutions
B.L10 = 25 million revolutions
C.L10 = 5 million revolutions
D.L10 = 15.6 million revolutions
Explanation: According to the ISO rating life formula for ball bearings (billes), L10 = (C / P)^p, where exponent p = 3 for ball bearings (and p = 10/3 for roller bearings). Here, L10 = (20 kN / 4 kN)^3 = (5)^3 = 125 million revolutions.

About the Bac F1 Bénin Exam

The Baccalauréat Série F1 (Construction Mécanique) is Benin's premier mechanical engineering secondary school leaving qualification, administered nationally by the Office du Baccalauréat du Bénin (OBB) under the Ministère de l'Enseignement Supérieur et de la Recherche Scientifique (MESRS). Delivered at technical lycées such as the Lycée Technique Coulibaly in Cotonou and regional technical lycées across Benin, Série F1 trains future mechanical technicians and engineering undergraduates in technical drawing, mechanical system design, resistance of materials (RDM), manufacturing process planning (usinage, contrats de phase), tooling design (montages d'usinage, outillage de découpage), industrial automation (GRAFCET, electro-pneumatics), applied mathematics, physics, and workshop practice. The official exam is conducted exclusively in French and features written design and analytical papers, an intensive 8-to-12-hour hands-on Travaux Pratiques workshop assessment, and a second-group oral for candidates scoring between 9.00 and 9.99/20. This practice bank provides 100 English-language multiple-choice questions with rigorous technical explanations, calculation steps, and exam tips. It is designed as an academic companion to master key engineering concepts, formulas, and methodologies.

Assessment

First group per the official OBB table for Série F1: a mandatory Travaux Pratiques practical (coeff 3, 8 to 12 hours) plus eight written papers: Français (coeff 2, 3h), Mathématiques (coeff 3, 4h), Sciences Physiques (coeff 2, 3h), Construction Mécanique (coeff 3, 6h), Mécanique (coeff 2, 4h), Automatique (coeff 2, 2h), Étude d'Outillage (coeff 2, 4h), Analyse de Fabrication (coeff 3, 4h) — Total 1 = 22 coefficients (440 points) — plus EPS (coeff 1) for 23 coefficients / 460 points. Second group oral: Philosophie (coeff 1), Anglais (coeff 1), Technologie Générale (coeff 1), Création et Gestion d'Entreprise ou Législation du Travail (coeff 1), Gestion de Production (coeff 1) — Total 2 = 5 coefficients / 100 points, open to candidates averaging 9.00 to 9.99/20, bringing the final total to 28 coefficients / 560 points. Note that Philosophie and Anglais are oral-only in this series. The 2026 national session ran 15–18 June. This bank is an English-language MCQ study adaptation; it cannot substitute for the workshop practical or the oral.

Time Limit

30 hours of written papers plus a mandatory 8–12 hour Travaux Pratiques (T.P.) practical, sat across the national session

Passing Score

10/20 (Weighted average >= 10.00 / 20; 9.00–9.99 qualifies for the second-group oral)

Exam Fee

5,000 XOF registration for Beninese candidates; 35,000 XOF for foreign candidates; plus 1,000 XOF for the relevé de notes and 2,000 XOF photo-scanning/form-printing for candidats libres (OBB note de service, 20 November 2025) (Office du Baccalauréat du Bénin (OBB) — Ministère de l'Enseignement Supérieur et de la Recherche Scientifique)

Bac F1 Bénin Exam Content Outline

Coeff 3, 6h written (~11% of total coefficients)

Construction Mécanique

Kinematic diagrams, mechanical linkages, degrees of freedom, ISO GPS tolerancing and fits, surface roughness, power transmission (gears, belts, bearings, clutches), and fastening systems.

Coeff 2, 4h written (~7%)

Mécanique (Statics, Dynamics & RDM)

Fundamental Principle of Statics (PFS) in 2D/3D, equilibrium, dynamics (PFD), moment of inertia, work/power, and resistance of materials (tensile, shear, bending, torsion stress and sizing).

Coeff 3, 4h written (~11%)

Analyse de Fabrication

Machining processes (turning, milling, drilling, grinding), cutting parameters (cutting speed, spindle speed, feed rate, machining time), process planning (contrats de phase, gammes d'usinage), isostatism (3-2-1 rule), and tool geometry/materials.

Coeff 2, 4h written (~7%)

Étude d'Outillage

Machining fixtures (montages d'usinage), locators, toggle and hydraulic clamping, stamping and cutting dies (clearance, cutting force, stripper plates), and metrological tooling.

Coeff 2, 2h written (~7%)

Automatique

GRAFCET sequential function charts (steps, transitions, parallel/alternative branches), electro-pneumatic and hydraulic circuits (cylinders, directional control valves, FRL), Boolean logic, and industrial sensors.

Coeff 3, 8–12h practical (~11%)

Travaux Pratiques (T.P.)

Mandatory hands-on workshop examination: machine tool setup (lathe, milling machine), workpiece alignment, tool offsets, machining execution, in-process metrology, defect troubleshooting, and workshop safety.

Math coeff 3 (4h) + Physique coeff 2 (3h) (~18%)

Mathématiques & Sciences Physiques

Applied engineering mathematics (complex numbers, differential equations, integrals, vectors, probability) and physical sciences (mechanics, thermodynamics, electromagnetic induction, optics).

Français coeff 2 (3h) written + oral subjects coeff 5 (~25%)

Français & Second-Group Oral Subjects

Technical communication in French (coeff 2 written); second-group oral subjects: Philosophie (1), Anglais (1), Technologie Générale (1), Création et Gestion d'Entreprise ou Législation du Travail (1), and Gestion de Production (1).

Coeff 1 (~4%)

Éducation Physique et Sportive (EPS)

Practical athletic performance and physical education evaluation.

How to Pass the Bac F1 Bénin Exam

What You Need to Know

  • Passing score: 10/20 (Weighted average >= 10.00 / 20; 9.00–9.99 qualifies for the second-group oral)
  • Assessment: First group per the official OBB table for Série F1: a mandatory Travaux Pratiques practical (coeff 3, 8 to 12 hours) plus eight written papers: Français (coeff 2, 3h), Mathématiques (coeff 3, 4h), Sciences Physiques (coeff 2, 3h), Construction Mécanique (coeff 3, 6h), Mécanique (coeff 2, 4h), Automatique (coeff 2, 2h), Étude d'Outillage (coeff 2, 4h), Analyse de Fabrication (coeff 3, 4h) — Total 1 = 22 coefficients (440 points) — plus EPS (coeff 1) for 23 coefficients / 460 points. Second group oral: Philosophie (coeff 1), Anglais (coeff 1), Technologie Générale (coeff 1), Création et Gestion d'Entreprise ou Législation du Travail (coeff 1), Gestion de Production (coeff 1) — Total 2 = 5 coefficients / 100 points, open to candidates averaging 9.00 to 9.99/20, bringing the final total to 28 coefficients / 560 points. Note that Philosophie and Anglais are oral-only in this series. The 2026 national session ran 15–18 June. This bank is an English-language MCQ study adaptation; it cannot substitute for the workshop practical or the oral.
  • Time limit: 30 hours of written papers plus a mandatory 8–12 hour Travaux Pratiques (T.P.) practical, sat across the national session
  • Exam fee: 5,000 XOF registration for Beninese candidates; 35,000 XOF for foreign candidates; plus 1,000 XOF for the relevé de notes and 2,000 XOF photo-scanning/form-printing for candidats libres (OBB note de service, 20 November 2025)

Keys to Passing

  • 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 F1 Bénin Study Tips from Top Performers

1Master mechanical construction and manufacturing analysis: Construction Mécanique (coeff 3), Analyse de Fabrication (coeff 3), and Travaux Pratiques (coeff 3) make up 9 out of 23 first-group coefficients.
2Practice ISO GPS tolerancing, fit calculations (e.g., clearance/interference for H7/g6, H7/p6), kinematic linkage degrees of freedom, and gear train speed/torque formulas until they are second nature.
3Review RDM (Resistance of Materials) step-by-step: normal stress, shear stress, bending moment diagrams, section modulus (I/v), and safety factor criteria.
4Memorize machining parameter formulas: cutting speed Vc = (π·D·N)/1000, feed rate Vf = fz·z·N, and machining time tm = L/Vf, along with the 3-2-1 isostatic positioning principles for process planning (contrats de phase).
5Prepare for the second-group oral subjects (Philosophie, Anglais, Technologie Générale, Législation du Travail / Gestion d'Entreprise, Gestion de Production) specifically for oral presentation and industrial reasoning.

Frequently Asked Questions

What is the focus of the Baccalauréat Série F1 in Benin?

Série F1 (Construction Mécanique) is a specialized technical stream focused on mechanical design, manufacturing analysis (usinage, process planning), tooling design (montages d'usinage, dies), statics, dynamics, resistance of materials (RDM), industrial automation, and hands-on workshop machining. It prepares candidates for engineering faculties such as EPAC (École Polytechnique d'Abomey-Calavi), university institutes of technology (IUT), and senior technician careers.

Is the official Benin Baccalauréat Série F1 multiple choice?

No. The official examination organized by the Office du Baccalauréat du Bénin (OBB) is conducted entirely in French and consists of extensive written engineering design papers, analytical calculations, drawing analyses, an intensive 8-to-12-hour practical workshop test (Travaux Pratiques), and a second-group oral for admissible candidates. This practice bank is an English-language MCQ adaptation created to reinforce core engineering principles, formulas, and diagnostic reasoning.

What practical and oral components are required in Série F1?

Série F1 includes a mandatory 8-to-12-hour Travaux Pratiques (T.P.) practical examination carrying coefficient 3 in the first group. In addition, candidates with a first-group average between 9.00 and 9.99/20 sit a second-group oral comprising five subjects: Philosophie (coeff 1), Anglais (coeff 1), Technologie Générale (coeff 1), Création et Gestion d'Entreprise ou Législation du Travail (coeff 1), and Gestion de Production (coeff 1). Note that Philosophie and Anglais are oral-only in Série F1.

What is the grading scale and pass threshold for Série F1 in Benin?

Grading is on a 0–20 scale. A weighted average of 10.00/20 or above in the first group earns direct admission (admis). Candidates with a weighted average between 9.00 and 9.99/20 are declared admissible (admissible) and proceed to the second-group oral exams. Candidates scoring below 9.00/20 are failed (ajourné). Benin uses a 9.00–9.99 admissibility threshold, unlike France's 8.00–9.99.

What are the subject coefficients in Série F1?

First group: Travaux Pratiques practical (coeff 3), Construction Mécanique (coeff 3), Analyse de Fabrication (coeff 3), Mathématiques (coeff 3), Mécanique (coeff 2), Automatique (coeff 2), Étude d'Outillage (coeff 2), Sciences Physiques (coeff 2), Français (coeff 2), plus EPS (coeff 1) = 23 coefficients / 460 points. Second group oral: 5 subjects with coeff 1 each = 5 coefficients / 100 points, resulting in a final total of 28 coefficients / 560 points.