Free Practice Questions for Bac IP 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.

Exam Review

Key Facts: Bac IP Niger Exam

OBEECS

The national office organizing the Baccalauréat Série IP examinations in Niger

Office du Baccalauréat du Niger (obeecsniger.com)

3 hours

Duration of each official IP technical paper reviewed

OBEECS official past papers

Free independent practice for Niger's Baccalauréat Série IP (Industries Pétrolières): English-language MCQs covering rotary drilling, drilling fluids and well control, petroleum chemistry and refining, pumps, compressors, piping, and industrial automation.

Sample Bac IP Niger Practice Questions

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

1In petroleum geology, which type of kerogen is predominantly derived from lacustrine algal organic matter and possesses a high hydrogen-to-carbon (H/C) ratio, making it prone to generating high-quality paraffinic waxy crude oil upon thermal maturation?

A.Type I kerogen

B.Type II kerogen

C.Type III kerogen

D.Type IV kerogen

Explanation: Type I kerogen originates mainly from algal and lacustrine (lake) sediments, characterized by high H/C ratios (> 1.5) and low O/C ratios (< 0.1). Upon burial and thermal maturation within the oil window, it yields abundant aliphatic hydrocarbons, producing light and paraffinic crude oils such as those found in many non-marine rift basins.

2What is the typical subsurface temperature range commonly referred to as the 'oil generation window' for standard source rock maturation?

A.20°C to 50°C

B.60°C to 120°C

C.160°C to 220°C

D.250°C to 350°C

Explanation: The primary 'oil window' corresponds to subsurface burial temperatures roughly between 60°C and 120°C (depending on the geothermal gradient and heating rate). Below 60°C, organic matter remains immature (diagenesis). Above 120°C–150°C, thermal cracking of oil into wet gas, condensate, and dry gas predominates.

3According to Darcy's linear filtration law for horizontal linear laminar flow through porous media, Q = (k * A * ΔP) / (μ * L). What does the parameter 'k' represent?

A.The dimensionless porosity ratio of the rock

B.The dynamic viscosity of the saturating fluid in centipoise

C.The absolute permeability of the porous medium in darcies or square meters

D.The capillary entry pressure of the rock pore throats

Explanation: In Darcy's law, 'k' is the permeability (perméabilité intrinsèque) of the porous medium, which measures the ease with which fluids can flow through interconnected pore networks. It is expressed in darcies (or millidarcies, mD) in petroleum engineering, or square meters (m²) in SI units.

4A cylindrical reservoir core plug has a bulk volume V_bulk = 100 cm³ and an interconnected pore volume V_pore = 22 cm³. What is the effective porosity (porosité efficace) of this reservoir sample?

A.4.55%

B.78.0%

C.15.4%

D.22.0%

Explanation: Effective porosity φ_eff is the ratio of interconnected pore volume to total bulk volume: φ_eff = (V_pore / V_bulk) * 100 = (22 cm³ / 100 cm³) * 100 = 22.0%.

5What is the primary technical function of heavy drill collars (masses-tiges) placed directly above the drill bit in a bottom hole assembly (BHA)?

A.To provide weight on bit (WOB) by gravity while keeping the upper drill pipe in tension to prevent buckling

B.To increase the rotational speed (RPM) of the drill string above that of the rotary table

C.To inject high-pressure gas into the annulus to assist mud circulation

D.To filter solid cuttings out of the circulating mud before they enter the drill pipe

Explanation: Drill collars are thick-walled, heavy steel tubulars positioned directly above the drill bit. Their excessive weight provides the required downward Weight on Bit (WOB / poids sur l'outil) through gravity. This maintains the neutral point inside the rigid collars, ensuring that the relatively flexible, thin-walled drill pipes above remain under continuous tension, preventing drill pipe fatigue and catastrophic buckling.

6Which drilling bit type utilizes synthetic diamond cutters bonded to tungsten carbide studs and operates predominantly through a shearing and scraping mechanism rather than crushing or gouging?

A.Milled-tooth roller cone bit (Trépan à dents usinées)

B.PDC bit (Polycrystalline Diamond Compact)

C.Tungsten carbide insert (TCI) roller cone bit

D.Cross-cutter roller cone bit

Explanation: PDC (Polycrystalline Diamond Compact) bits are fixed-cutter (head without moving bearings) bits having synthetic diamond discs sintered onto tungsten carbide substrates. They drill rock primarily by continuous shearing (cisaillement), offering high penetration rates in non-abrasive to moderately abrasive formations.

7What dense, insoluble mineral powder is most commonly added to water-based drilling muds to increase fluid density and control subsurface formation pressures?

A.Sodium chloride (NaCl)

B.Calcium carbonate (CaCO3)

C.Barium sulfate (Barite - BaSO4)

D.Bentonite clay (Montmorillonite)

Explanation: Barite (barytine, BaSO4) is the industry standard weighting material for drilling muds. It has a high specific gravity (4.20 to 4.50 g/cm³), is chemically inert, non-abrasive, and insoluble in water and oil, allowing mud density to be increased up to 2.2 g/cm³ (18+ ppg) without significantly increasing chemical reactivity.

8A vertical oil well has reached a True Vertical Depth (TVD) of H = 2,500 m. The drilling mud column has a uniform density ρ = 1,200 kg/m³. Taking g = 9.81 m/s², what is the hydrostatic pressure P_hyd at the bottom of the well?

A.29.43 bar

B.120.0 bar

C.245.2 bar

D.294.3 bar

Explanation: Hydrostatic pressure is calculated as P_hyd = ρ * g * H. In SI units: P_hyd = 1,200 kg/m³ * 9.81 m/s² * 2,500 m = 29,430,000 Pa = 29.43 MPa. Converting to bar (where 1 bar = 100,000 Pa = 10^5 Pa): P_hyd = 29,430,000 / 100,000 = 294.3 bar.

9What is the primary indicator on a drilling rig floor that a formation kick (venue de fluide) has entered the wellbore while drilling ahead?

A.An unexpected increase in mud pit volume and an increase in return flow rate

B.A sudden decrease in drill string hook load and pump discharge pressure

C.A rapid drop in mud tank level accompanied by pump cavitation

D.A total disappearance of cuttings over the shale shaker screens

Explanation: When formation pore pressure exceeds wellbore hydrostatic pressure, formation fluids (gas, oil, or water) enter the borehole, displacing an equivalent volume of drilling mud. This causes a sudden, measurable gain in the surface active mud pit volume and an increase in the return flow line sensor reading while circulating.

10In a standard Blowout Preventer (BOP) stack, which component is designed to seal around any size or shape of pipe in the wellbore, or even close completely on open hole in an emergency if designed for full closure?

A.Blind ram preventer (Obturateur à mâchoires pleines)

B.Annular preventer (Obturateur annulaire)

C.Pipe ram preventer (Obturateur à mâchoires pour tiges)

D.Shear ram preventer (Obturateur à mâchoires cisaillantes)

Explanation: The annular preventer (obturateur annulaire) uses a reinforced elastomeric packing donut that is hydraulically forced upward and inward against a spherical or conical bowl. This enables it to seal around pipes of varying diameters (drill pipe, tool joints, casing, tubing) and wirelines.

About the Bac IP Niger Exam

Série IP is Niger's specialized technical baccalauréat in petroleum industries, administered by OBEECS. This independent bank provides conceptual English-language MCQ practice in drilling, petroleum chemistry and refining, industrial equipment, and automation. It is not an official translation or paper simulation and cannot replace extended calculations, diagrams, laboratory work, or operational training.

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 Forage, Pétrochimie, Automatismes industriels, Chimie, Électrotechnique-électronique, Dessin, Mathématiques, Français, Anglais, and Arabe. The second group lists Automatismes industriels, Chimie, Mécanique, Pétrochimie, and Mathématiques. The technical papers reviewed are in French.

Time Limit

Official papers reviewed: Forage 3 hours; Pétrochimie 3 hours; Automatismes industriels 3 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.

Official sources

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)

Petroleum Geology and Drilling Operations

Hydrocarbon formation, reservoir rocks (porosity, permeability), rotary drilling equipment, drilling fluids, hydrostatic balance, kick control, and casing/cementing

25% of this local bank (25 questions)

Hydrocarbon Production and Surface Processing

Reservoir drive mechanisms, wellhead completion, artificial lift methods, two-phase and three-phase separators, emulsion treatment, and gas dehydration

20% of this local bank (20 questions)

Refining and Petrochemical Processes

Atmospheric and vacuum distillation cuts, catalytic reforming, fluid catalytic cracking, visbreaking, petrochemical building blocks, and fuel quality specifications

15% of this local bank (15 questions)

Petroleum Piping and Mechanical Equipment

Centrifugal and positive displacement pumps, NPSH and cavitation, compressors, heat exchangers, valves, piping classes, and storage tank safety

15% of this local bank (15 questions)

Industrial Automation, Safety, and Environmental Protection

Sensors and transmitters (P&ID symbols), Emergency Shutdown (ESD) logic, ATEX electrical zoning, relief valves and flaring, and environmental spill response

Preparing for the Bac IP 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 Forage, Pétrochimie, Automatismes industriels, Chimie, Électrotechnique-électronique, Dessin, Mathématiques, Français, Anglais, and Arabe. The second group lists Automatismes industriels, Chimie, Mécanique, Pétrochimie, and Mathématiques. The technical papers reviewed are in French.
Time limit: Official papers reviewed: Forage 3 hours; Pétrochimie 3 hours; Automatismes industriels 3 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 IP Niger: Suggested Study Strategy

1Master hydrostatic pressure calculations: P_hyd = rho * g * h, and understand how drilling mud density prevents formation kicks while avoiding fracturing.

2Review the distillation fractions of crude oil by boiling point range: LPG (< 20°C), light/heavy naphtha (20–180°C), kerosene (180–250°C), gasoil/diesel (250–350°C), and atmospheric residue (> 350°C).

3Practise gas-oil-water separator calculations: retention time t = V / Q and Stokes' law for droplet settling.

4Understand the primary reservoir drive mechanisms: water drive, gas cap drive, dissolved solution gas drive, and gravity drainage.

5Know the safety protocols for hydrogen sulfide (H2S) and hazardous explosive atmospheres (ATEX Zone 0, Zone 1, Zone 2).

Frequently Asked Questions

Is the Niger Bac IP exam multiple-choice?

No. The official Série IP materials reviewed use written technical questions, calculations, diagrams, and explanatory responses in French. This bank is an independent English-language MCQ study adaptation, not an official translation or format simulation.

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

The review used OBEECS papers in Forage, Pétrochimie, and Automatismes industriels, together with the official first- and second-group paper lists. Those papers cover drilling fluids and water-well completion, petrochemical feedstocks and products, and motor-control/GRAFCET tasks.

What technical subjects are tested in Série IP?

The official paper bank lists Forage, Pétrochimie, Automatismes industriels, Chimie, Électrotechnique-électronique, Dessin, Mathématiques, Français, Anglais, and Arabe in the first group, with Automatismes industriels, Chimie, Mécanique, Pétrochimie, and Mathématiques in the second group.

Free Practice Questions for Bac IP Niger

Explore More Niger Baccalauréat

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

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

Baccalauréat Série C — Mathématiques et Sciences Physiques (Niger)

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

Baccalauréat Série E — Mathématiques et Techniques (Niger)

Baccalauréat Série F1 — Construction Mécanique (Niger)