100+ Free COREN Craftsman Practice Questions

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2026 Statistics

Key Facts: COREN Craftsman Exam

50%

Minimum passing score required in each section of the COREN exam

COREN Guidelines for Professional Examination

NGN 38,000

Total application, processing, exam, and registration fee for Craftsmen

COREN Official Schedule of Fees

4 Cadres

Engineering cadres regulated: Engineer, Technologist, Technician, Craftsman

Decree 55 of 1970 / Amendment Act 2018

2 years

Minimum post-qualification practical experience required to apply

COREN Personnel Registration Requirements

1970

Year COREN was established under Decree No. 55

Engineers (Registration, etc.) Act

The COREN Registered Engineering Craftsman written examination covers workshop safety, mechanical tools, machine operations, welding and fabrication, basic electrical wiring, precision measurement, and regulatory frameworks (Decree 55 of 1970 and the COREN 2018 amendment). A minimum of 50% in each section is required to pass, followed by an oral interview.

Sample COREN Craftsman Practice Questions

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

1Which type of fire extinguisher is most appropriate for a Class A fire involving materials like wood, paper, and textiles in an engineering workshop?

A.Water-based or dry powder extinguisher

B.Carbon dioxide (CO2) extinguisher only

C.Wet chemical extinguisher only

D.Metal fire powder (Class D powder) only

Explanation: Class A fires involve ordinary combustible solids like wood, paper, and clothing. Water-based extinguishers cool the fuel and extinguish the flame, while multipurpose dry powder is also suitable, making them the most appropriate choices.

2In the event of a Class B fire involving petrol, diesel, or lubricating oils in a machine shop, which substance must NEVER be used to extinguish it?

A.Foam

B.Carbon Dioxide (CO2)

C.Water

D.Dry Powder

Explanation: Water must never be used on Class B flammable liquid fires because it is denser than the liquid and will cause the burning fuel to splash, spread, and intensify the fire rapidly.

3What is the recommended first step when dealing with a Class C gas fire, such as a leaking acetylene or butane hose, in a welding bay?

A.Discharge a water extinguisher directly on the flame

B.Isolate and turn off the gas supply source immediately

C.Smother the flame using a damp canvas fire blanket

D.Cool the surrounding cylinders with CO2 before extinguishing

Explanation: For Class C gas fires, the priority is to isolate and shut off the gas supply first. Extinguishing the flame before stopping the gas flow creates a dangerous risk of gas accumulation, which can cause a catastrophic explosion.

4Which extinguishing agent is specifically formulated to combat a Class D fire involving combustible metals like magnesium chips or sodium in a machine shop?

A.Halon gas cleaner

B.LITH-EX or specialized dry powder (NaCl/graphite base)

C.Water mist spray

D.High-expansion chemical foam

Explanation: Class D fires involve combustible metals which react violently with water, foam, and CO2. Specialized dry powders (like copper, graphite, or sodium chloride based powders) or LITH-EX are required to smother the metal without causing explosive reactions.

5When extinguishing a fire in an electrical control panel that is still energized, which extinguisher type must be used to prevent electrical shock to the operator?

A.Wet chemical or foam extinguisher

B.Water fire bucket

C.Carbon dioxide (CO2) or dry powder extinguisher

D.Soda-acid pressure extinguisher

Explanation: CO2 and dry powder are non-conductive extinguishing agents. Water, foam, and soda-acid extinguishers contain conductive liquids that present a severe electrocution hazard to the person operating the extinguisher.

6If a workshop assistant sustains a chemical burn from battery acid or pickling solution on their arm, what is the correct immediate first-aid action?

A.Apply engine oil or grease to soothe the skin

B.Neutralize the acid by pouring concentrated alkaline soap directly on it

C.Flush the affected area with clean running water for at least 20 minutes

D.Wrap the arm tightly in dry cotton bandages without washing

Explanation: Immediate, continuous flushing with clean running water for a minimum of 20 minutes is critical to dilute and wash away the corrosive chemical. Neutralizing agents or oils must never be applied as they can cause exothermic heat reactions or trap the chemical.

7You find a colleague lying unconscious and still in contact with a live electrical conduit in the workshop. What should you do first?

A.Pull the victim away immediately using your bare hands to save time

B.Safely switch off the main electrical power source or isolate the victim using a non-conductive object

C.Pour a bucket of water on the victim to wake them up

D.Begin cardiopulmonary resuscitation (CPR) immediately while they are on the wire

Explanation: Safety is paramount; you must first isolate the electrical path to avoid becoming a victim yourself. Turn off the main breaker or push the victim away using a dry wooden stick, PVC pipe, or dry rubber mat before administering first aid.

8According to the safety regulations of the Nigerian Factory Act, what is the primary duty of an employer regarding Personal Protective Equipment (PPE)?

A.To sell the required safety gear to the workers at a subsidized rate

B.To provide suitable PPE to employees free of charge and ensure its proper maintenance

C.To instruct employees to purchase their own PPE from approved local hardware stores

D.To inspect and fine employees who choose to work without safety boots

Explanation: Under industrial safety laws in Nigeria (the Factory Act), employers are legally mandated to supply workers with appropriate protective clothing and equipment (such as helmets, goggles, safety boots) at no cost to the employee, and maintain them in good repair.

9What are the standard color codes for oxygen and acetylene cylinders used in gas welding workshops under Nigerian and international safety practices?

A.Oxygen is Red; Acetylene is Blue

B.Oxygen is Black; Acetylene is Maroon

C.Oxygen is Yellow; Acetylene is Green

D.Oxygen is Maroon; Acetylene is Black

Explanation: Standard industrial safety standards (ISO/British standards followed in Nigeria) mandate that Oxygen cylinders be painted Black (or blue/grey with white shoulders under newer standards) and Acetylene cylinders be painted Maroon (or red) to prevent dangerous gas mix-ups.

10What is the primary function of a flashback arrestor installed on a gas welding or cutting blowpipe setup?

A.To regulate and reduce the pressure of the gas flowing to the torch

B.To prevent a backfire flame from traveling back past the regulator into the gas cylinder and causing an explosion

C.To filter out moisture and dust particles from the oxygen line

D.To automatically mix the oxygen and acetylene in the correct ratio

Explanation: A flashback arrestor is a safety device containing a flame barrier and a check valve. It stops a reverse flow of gas and extinguishes a flame traveling back up the hose before it reaches the regulator and cylinder, preventing a catastrophic explosion.

About the COREN Craftsman Exam

The Council for the Regulation of Engineering in Nigeria (COREN) administers the professional practice exams for the registration of engineering personnel. The Engineering Craftsman cadre is designed for skilled vocational workers, tradesmen, and artisans who hold NABTEB, WAEC Technical, or Trade Test Grade I qualifications and have at least two years of experience. Registered status allows craftsmen to legally practice, supervise workshop operations, and participate in formal engineering teams in Nigeria.

Assessment

Question count not published by the exam provider

Time Limit

2 hours for the written theory paper

Passing Score

Candidates must score a minimum of 50% in each section of the examination

Exam Fee

NGN 38,000 total personnel registration and examination fee (Council for the Regulation of Engineering in Nigeria (COREN))

COREN Craftsman Exam Content Outline

15%

Workshop Safety & First Aid

Industrial workshop hazards, PPE selection, first aid, fire safety classifications, chemical handling, and safety legislation under the Nigerian Factory Act.

15%

Mechanical Tools & Bench Work

Mechanical hand tools, hacksawing, filing, bench fitting, joinery, woodworking hand tools, sheet metal stakes, snips, pattern development, and workshop projects.

15%

Machine Shop Practice

Lathe machinery turning, facing, drilling operations, milling machines, grinding wheel safety, speeds and feeds calculations, and cutting fluids.

15%

Welding & Fabrication

Electric arc welding (SMAW), gas welding, oxy-acetylene cylinder pressure regulations, flame adjustments, welding defects, joints, and thermal cutting safety.

15%

Basic Electrical & Wiring

Ohm's law, domestic wiring, earthing (grounding) system installations, distribution board wiring, conduit laying, multimeter testing, and shock prevention.

15%

Measurement & Inspection

Reading precision instruments (vernier calipers, micrometers, dial test indicators), engineering drawing symbols, projection systems, limits, tolerances, and fits.

10%

COREN Regulation & Ethics

Decree 55 of 1970, COREN Amendment Act 2018 powers, roles of Engineers, Technologists, Technicians, and Craftsmen, and rules of professional conduct in Nigeria.

How to Pass the COREN Craftsman Exam

What You Need to Know

Passing score: Candidates must score a minimum of 50% in each section of the examination
Assessment: Question count not published by the exam provider
Time limit: 2 hours for the written theory paper
Exam fee: NGN 38,000 total personnel registration and examination fee

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

COREN Craftsman Study Tips from Top Performers

1Focus heavily on practical safety guidelines. Know the classes of fires and corresponding fire extinguishers used in workshops.

2Understand precision measurement tool scale divisions. Be prepared to calculate readings on vernier calipers and micrometers.

3Master the distinction between the four COREN cadres (Engineers, Technologists, Technicians, and Craftsmen), especially the limits of practice of a craftsman.

4Review the mechanical and electrical trade practices. Basic electrical earthing rules, welding flame adjustments, and lathe operations are highly tested.

5Study Decree 55 of 1970 and the COREN Amendment Act of 2018 to answer legal and regulatory questions correctly.

Frequently Asked Questions

Who is eligible to register as a COREN Engineering Craftsman?

Candidates holding accredited technical qualifications such as Trade Test Grade I, WAEC Technical Certificate, or NABTEB (engineering trades), along with a minimum of two years of relevant post-qualification experience under the supervision of a registered engineer.

What is the format of the COREN Craftsman examination?

The examination is divided into two parts: a written exam (testing general engineering safety, trade knowledge, and regulatory compliance) and an oral professional interview where candidates present their experience and defend their technical competency.

What score is required to pass the COREN examination?

Candidates must achieve a minimum score of 50% in each section of the examination. Scoring below 50% in any section results in a deferral or failure.

What are the fees associated with registering as a COREN Craftsman?

The total fee is NGN 38,000, which includes NGN 5,000 application fee, NGN 3,000 processing fee, NGN 17,000 examination fee, and NGN 13,000 registration fee. These are paid via the official COREN portal.

What are the core regulatory frameworks tested in the exam?

The exam tests knowledge of Decree No. 55 of 1970 (which founded COREN), Decree No. 27 of 1992, and the Engineers (Registration, etc.) (Amendment) Act 2018, which gives COREN prosecutorial powers and establishes the Engineering Regulations Monitoring (ERM) program.