COREN Engineering Practice Examination — Registered Engineering Technologist (Nigeria)

Under the Council for the Regulation of Engineering in Nigeria (COREN) framework, which qualification primarily registers a candidate into the Engineering Technologist cadre?

• AHigher National Diploma (HND) in Engineering from an accredited polytechnic
• BNational Diploma (ND) in Engineering from an accredited technical institute
• CBachelor of Engineering (B.Eng.) degree from an accredited university
• DFull Technological Certificate (FTC) without any additional postgraduate studies

What is the minimum post-qualification practical experience required for an HND holder to be eligible for registration as an Engineering Technologist with COREN?

• AThree (3) years of supervised post-qualification engineering experience
• BTwo (2) years of post-qualification practical work including the NYSC service year
• CFour (4) years of experience with at least two years in a design office
• DFive (5) years of independent practice without senior professional supervision

The Engineers (Registration, etc.) (Amendment) Act of 2018 granted COREN which of the following significant new powers to control engineering practice in Nigeria?

• AProsecutorial powers to try unregistered individuals and firms violating engineering regu…
• BThe authority to fund and manage public infrastructure development directly across Nigeri…
• CExclusive control over the licensing of all general trade craftsmen and technicians witho…
• DThe power to set standard commercial rates and prices for all engineering consulting cont…

Which of the following professional associations is the registered national body dedicated to promoting the interests of engineering technologists in Nigeria?

• ANigerian Association of Technologists in Engineering (NATE)
• BNigerian Society of Engineers (NSE)
• CNigerian Institute of Engineering Technicians (NISET)
• DNigerian Association of Engineering Craftsmen (NAEC)

Under the COREN Act, what is the primary role of the Engineering Regulations Monitoring (ERM) department?

• ATo inspect and monitor engineering sites, factories, and offices to ensure compliance wit…
• BTo organize the academic examinations for students in polytechnics and technical colleges
• CTo register companies with the Corporate Affairs Commission (CAC) for engineering consult…
• DTo resolve legal disputes between engineering contractors and client ministries

What is the statutory mandate of the Nigerian Electricity Management Services Agency (NEMSA) regarding electrical installations?

• ATo carry out technical inspection, testing, and certification of all electrical installat…
• BTo generate and distribute electric power to industrial consumers in Nigeria
• CTo issue professional licenses to engineering technologists in all disciplines
• DTo regulate the retail tariff rates for electricity consumers in Nigeria

Under the provisions of the Nigerian Factory Act, which of the following items of plant equipment must be periodically inspected and certified by an authorized inspector?

• ASteam boilers, air receivers, and lifting machinery
• BAll electric hand drills and hand-held grinders
• COffice heating, ventilation, and air conditioning (HVAC) systems
• DManual workpiece jigs and storage racks in assembly shops

In an industrial workshop, a Class C fire involves which of the following fuels under standard safety classifications?

• AEnergized electrical equipment and wiring
• BFlammable liquids such as petrol, diesel, and solvents
• CCombustible metals such as magnesium, titanium, and sodium
• DOrdinary solid combustibles like wood, paper, and textiles

When working in an engineering facility, what is the primary purpose of a 'Permit to Work' (PTW) system?

• ATo ensure that high-risk maintenance tasks are systematically assessed, hazards identifie…
• BTo grant technicians permission to work overtime and claim additional compensation
• CTo verify that the sub-contractor has been paid their initial mobilisation fee
• DTo allow unregistered personnel to operate heavy industrial equipment during emergencies

Under the Hierarchy of Controls for risk management, which method is considered the most effective way to address a workplace hazard?

• AElimination of the hazard at its source
• BProvision of Personal Protective Equipment (PPE)
• CImplementation of administrative rules and safety warnings
• DEngineering controls such as safety guards and physical barriers

What is the primary difference between a Job Safety Analysis (JSA) and a Hazard and Operability Study (HAZOP)?

• AJSA focuses on the steps of a specific task to protect the worker, while HAZOP is a syste…
• BJSA is used only in civil engineering, whereas HAZOP is used exclusively in software deve…
• CJSA is a legal requirement under the COREN Act, whereas HAZOP is completely voluntary in…
• DJSA is performed after an accident occurs, whereas HAZOP is only done before the plant de…

Under the Lockout-Tagout (LOTO) safety system, what is the significance of placing a personal padlock on a group isolation box?

• AIt prevents the energy isolation points from being re-energized while the individual is w…
• BIt signals to the supervisor that the technician has arrived on the site and checked in
• CIt secures the technician's personal tools against theft by other workshop crews
• DIt satisfies the commercial warranty requirements of the machine manufacturer

Which of the following is the correct procedure for entering a confined space (such as a storage tank or deep sewer) under industrial safety regulations?

• ATest the atmosphere for gas/oxygen, verify isolation, obtain a entry permit, and ensure a…
• BWear a dust mask and enter quickly to minimize time spent inside the environment
• CEnsure the space is well lit with standard high-voltage halogen lamps before stepping ins…
• DEnter the space alone during lunch breaks when other operations are suspended to avoid di…

According to the Environmental Impact Assessment (EIA) Act No. 86 of 1992 in Nigeria, which phase of a major industrial manufacturing project requires the EIA report to be approved?

• ABefore any site clearing, preparation, or construction work commences
• BDirectly after the plant has been fully commissioned and is ready for commercial producti…
• CWithin six months of completing the first year of operation as part of the annual audit
• DOnly when public complaints are filed with the National Environmental Standards and Regul…

Under the Nigerian Factory Act, if a fatal accident or serious injury occurs in a registered factory, within what timeframe must the occupier report the incident to the nearest Inspector of Factories?

• AForthwith (immediately), and within 24 hours if the accident results in death
• BWithin fourteen (14) business days as part of the monthly safety statistics summary
• COnly when the worker or their family intends to file a claim for statutory compensation
• DAt the end of the fiscal year during the annual general factory license renewal

To renew an annual engineering practicing license in Nigeria, a registered technologist must demonstrate participation in Continuing Professional Development (CPD). Which of the following activities earns CPD points?

• AAttending professional workshops, technical seminars, and publishing engineering papers
• BOperating a personal commercial retail store unrelated to engineering services
• CAccumulating years of service in an administrative non-technical role
• DPassing a standard driving test or gaining general commercial permits

Under the COREN Act, if a registered engineering technologist is found guilty of professional misconduct by the COREN Registered Engineering Personnel Disciplinary Tribunal, which penalty can be applied?

• ASuspension or complete deletion of their name from the COREN register
• BSentence of imprisonment without the right of appeal in a civil court
• CImposition of a corporate tax fine on the candidate's employer
• DDemotion of the candidate's academic diploma status at their graduating institution

What is the primary responsibility of a Registered Engineering Technologist during the construction phase of a project compared to a Registered Engineer?

• AThe technologist focuses on design translation, construction technology application, and…
• BThe technologist has no authority on-site and acts only as an administrative clerk for th…
• CThe technologist is legally responsible for structural calculations, while the engineer h…
• DThe technologist signs the structural design sheets, while the engineer approves the fina…

Which of the following safety measures is mandatory when working on heavy machinery to prevent limbs from getting caught in moving parts?

• AInstallation of physical interlocking guards and emergency stop buttons within easy reach
• BInstructing operators to wear loose-fitting gloves and long sleeves for protection
• CRelying entirely on visual warning signs posted near the machine
• DIncreasing the operating speed of the machine to minimize cycle times

Under Nigerian electrical codes, what is the required color code for the Protective Earth (PE) conductor in a three-phase electrical power cable system?

• AGreen and yellow stripes
• BSolid black
• CSolid red
• DSolid blue

In technical drawings, which projection system is characterized by placing the plan view directly below the front elevation?

• AFirst Angle Projection
• BThird Angle Projection
• CIsometric Projection
• DOblique Projection

When interpreting an engineering drawing, what does the geometric dimensioning and tolerancing (GD&T) symbol consisting of a circle with a crosshair inside represent?

• ATrue Position tolerance
• BConcentricity tolerance
• CFlatness deviation limit
• DCylindricity control

In mechanical design, what type of fit is produced by the ISO tolerance designation H7/p6?

• AAn interference fit (always requires force or thermal expansion to assemble)
• BA clearance fit (always allows free relative movement between components)
• CA transition fit (may result in either clearance or interference depending on actual size…
• DA sliding fit (allows smooth hand-sliding alignment only)

When translating a conceptual design of a steel structure into fabrication details, what is the primary purpose of specifying a 'datum' plane or line?

• ATo serve as a common reference point from which all dimensions and tolerances are measure…
• BTo indicate the soil foundation level for excavation equipment on site
• CTo define the maximum weight limit of the structure for crane lifting
• DTo specify the surface roughness finish of the structural column

In structural reinforced concrete drawings, what does a specification of 'C25/30' concrete mix design represent?

• AA mix with a characteristic cylinder strength of 25 MPa and cube strength of 30 MPa at 28…
• BA ratio of 25 kg of cement to 30 kg of sharp sand in the batch mixer
• CA concrete that takes 25 minutes to set and reaches final curing in 30 days
• DA density of 25 kN/m^3 with a maximum aggregate size of 30 mm

On a welding fabrication drawing, a symbol consisting of a horizontal reference line with an arrow pointing to a joint and a small triangle sitting on the reference line represents which type of weld?

• AFillet weld
• BSingle-V butt weld
• CSquare butt weld
• DPlug or slot weld

In a Piping and Instrumentation Diagram (P&ID), a circle with a horizontal line drawn across its center containing the letters 'LIC' indicates which device?

• AA level indicator controller located on a control panel board (accessible to operator)
• BA local pressure switch installed directly on the pipeline
• CA low-current electrical interlock safety relay inside a cabinet
• DA linear induction coil used for pipeline magnetic cleaning

What does a surface roughness value of 'Ra 3.2' specified next to a machining check symbol represent?

• AThe arithmetic average roughness height limit of 3.2 micrometers (microns)
• BThe total depth of the tool cut, which must be exactly 3.2 millimeters
• CThe Rockwell hardness grade C rating of 3.2 on the surface skin
• DThe feed rate of the grinding wheel in meters per minute

An engineering drawing note specifies a thread as 'M16 x 1.5 - 6g'. What is the pitch of this thread?

• A1.5 mm
• B16 mm
• C6 mm
• D1.5 inches

In assembly drawings, what is the primary purpose of a 'Bill of Materials' (BOM)?

• ATo list all individual parts, their item numbers, descriptions, quantities, and materials…
• BTo document the total financial labor cost of the assembly process
• CTo serve as a shipping manifest for the final packaged product
• DTo detail the mechanical stress test results for each components

When converting a 3D isometric view into 2D orthographic views, what is a common source of error for junior design draftspersons?

• ADrawing hidden features as solid lines instead of dashed lines, or misinterpreting foresh…
• BScaling the dimensions by a standard factor of 2.0 to make them fit on the sheet
• CForgetting to color the different components in the orthographic views
• DUsing standard uppercase lettering for dimensions and annotations

In sheet metal fabrication design, what does the 'K-factor' represent?

• AThe ratio of the neutral axis position to the material thickness during a bend
• BThe thermal conductivity of the alloy sheet during welding operations
• CThe springback angle coefficient of the steel sheet after die release
• DThe ultimate tensile strength factor of the material divided by yield strength

Which of the following lines on an engineering drawing is drawn using a thick, solid line type?

• AVisible outlines and edges of the component
• BDimension lines and extension lines
• CCenterlines of cylindrical features or shafts
• DHatching lines indicating a cross-section cut

What is the primary difference in application between a Universal Beam (UB) section and a Universal Column (UC) section in structural steel drawings?

• AA UB is designed primarily to resist bending loads (depth is significantly greater than w…
• BA UB is made of cast iron, while a UC is made of high-carbon tempered tool steel
• CA UB can only be used horizontally, while a UC can only be placed at an angle of 45 degre…
• DA UB is used exclusively for light residential buildings, while a UC is used only in offs…

In computer-aided design (CAD) systems, why are neutral file formats like STEP (.stp) or IGES (.igs) preferred for data exchange between different software?

• AThey allow 3D model geometry to be opened and edited across different CAD platforms witho…
• BThey compress the file size by a factor of 100 to allow transmission over slow network co…
• CThey automatically perform finite element stress analysis when saved
• DThey convert the 3D model into an executable file that runs without any CAD viewer instal…

Which formula is used to calculate the cutting speed (V) in meters per minute during a lathe turning operation, where D is the workpiece diameter in millimeters and N is the rotational speed in RPM?

• AV = (pi * D * N) / 1000
• BV = pi * D * N
• CV = (1000 * N) / (pi * D)
• DV = (D * N) / 318

What is the primary operational difference between climb milling (down milling) and conventional milling (up milling)?

• AIn climb milling, the cutter rotates in the direction of the table feed, while in convent…
• BClimb milling is used only for non-metallic materials, while conventional milling is for…
• CClimb milling requires a much lower power motor because the cutter helps push the workpie…
• DConventional milling produces a better surface finish and longer tool life than climb mil…

In CNC programming, what do the G-codes G01 and G02 represent?

• AG01 represents linear interpolation (controlled feed rate), and G02 represents clockwise…
• BG01 represents rapid positioning (maximum speed), and G02 represents counter-clockwise ci…
• CG01 sets the system units to millimeters, and G02 sets them to inches
• DG01 turns the coolant on, and G02 turns the coolant off

When selecting a grinding wheel, which abrasive material is best suited for grinding non-ferrous metals like copper, brass, and aluminum?

• ASilicon Carbide (SiC)
• BAluminum Oxide (Al2O3)
• CCubic Boron Nitride (CBN)
• DStandard quartz sand

In Shielded Metal Arc Welding (SMAW), what is the difference in weld bead characteristics when using Direct Current Electrode Positive (DCEP) compared to Direct Current Electrode Negative (DCEN)?

• ADCEP provides deeper penetration because about 70% of the arc heat is concentrated at the…
• BDCEP concentrates all heat in the welding machine handle, requiring heavy water cooling
• CDCEN is only used when welding non-metallic materials like plastics and composites
• DDCEP produces severe magnetic arc blow that completely prevents welding of structural ste…

When welding thin aluminum sheet using Gas Tungsten Arc Welding (GTAW / TIG), which type of welding current is preferred to remove the refractory oxide layer?

• AAlternating Current (AC)
• BDirect Current Electrode Negative (DCEN)
• CDirect Current Electrode Positive (DCEP) continuously
• DPulsed Direct Current straight polarity

In Gas Metal Arc Welding (GMAW / MIG), what is the main function of using a shielding gas consisting of 100% Carbon Dioxide (CO2)?

• AIt is a low-cost gas that provides deep penetration, but results in a harsh arc with high…
• BIt is an inert gas that prevents any chemical reactions and produces a highly aesthetic w…
• CIt chemically converts rust on the steel surface into pure iron during welding
• DIt is used exclusively to weld thin aluminum and magnesium alloys

A welding defect known as 'undercut' is primarily caused by which of the following welding parameter errors?

• AExcessive welding current (amperage) or improper electrode angle
• BExtremely slow travel speed combined with low voltage
• CInadequate shielding gas flow rate or damp electrodes
• DUsing the wrong electrode diameter for the plate thickness

When measuring a shaft using a standard metric micrometer with a 0.01 mm resolution, the thimble has 50 divisions and the sleeve has 0.5 mm pitch markings. If the sleeve reads 12.5 mm and the thimble line aligns with '34', what is the final measured dimension?

• A12.84 mm
• B12.34 mm
• C13.04 mm
• D12.534 mm

What is the correct method to check and correct a 'zero error' on a Vernier caliper before taking critical measurements?

• AClose the jaws completely and check if the zero mark on the vernier scale aligns with the…
• BLoosen the locking screw and slide the vernier scale manually until the pointer points to…
• CSoak the caliper in cutting oil for 10 minutes to expand the metal jaws to the zero mark
• DTap the jaws gently with a brass hammer to realign the sliding jaw assembly

Which of the following precision metrology instruments is best suited for checking the runout (eccentricity) of a rotating shaft mounted on a lathe?

• ADial Test Indicator (DTI)
• BVernier Depth Gauge
• COutside Micrometer
• DTelescopic Bore Gauge

In foundry technology, what is the primary cause of a casting defect known as a 'blowhole'?

• AEntrapped gases in the molten metal due to low permeability of the sand mold or high mois…
• BPouring the molten metal at an extremely low temperature, causing premature solidification
• CUsing a gating system that has no riser to feed shrinkage cavities
• DUsing sand with excessive grain size, causing metal penetration into the mold walls