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2026 Statistics

Key Facts: Maskinmestereksamen Exam

210–270 ECTS

Total academic credits for the Professionsbachelor som maskinmester degree

BEK nr. 1348 af 23/11/2018

STCW III/2

Qualifying STCW level enabling eventual service as Chief Engineer unlimited

Søfartsstyrelsen / IMO

5 Colleges

Accredited marine engineering colleges in Denmark (MSK, AAMS, FMS, MARTEC, SIMAC)

Uddannelses- og Forskningsministeriet

3 Attempts

Standard maximum exam attempts per subject under Danish examination order

BEK nr. 847 af 16/06/2023 § 34

0.50% / 0.10%

Global vs ECA sulfur fuel oil limit under MARPOL Annex VI regulations

IMO MARPOL Annex VI Reg. 14

The Professionsbachelor som maskinmester is Denmark's comprehensive dual-career marine and industrial engineering qualification. It satisfies Danish Maritime Authority and STCW III/1 and III/2 requirements for international sea service up to Chief Engineer, as well as high-voltage electrical authorization. This 100-question English study bank covers marine diesels, electrical plants, instrumentation, auxiliary systems, thermodynamics, and MARPOL environmental regulations.

Sample Maskinmestereksamen Practice Questions

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

1In a modern low-speed two-stroke crosshead diesel engine, what is the primary function of the piston rod stuffing box (scraper gland)?
A.To prevent scavenge air and combustion sludge from entering the crankcase while scraping lubricating oil back down into the crankcase
B.To lubricate the crosshead pin by directing high-pressure system oil into the crosshead bearings
C.To provide lateral alignment for the piston rod to prevent side thrust against the cylinder liner
D.To act as a pressure relief barrier in the event of a scavenge air trunk explosion
Explanation: The piston rod stuffing box is mounted in the diaphragm plate separating the scavenge air receiver from the crankcase. Its upper scraper and sealing rings prevent contaminated cylinder oil and pressurized scavenge air from entering the crankcase, while the lower scraper rings prevent crankcase system oil from being carried up into the scavenge space. This keeps the crankcase system oil clean and minimizes cylinder oil contamination.
2A mechanical indicator diagram taken from a cylinder of a two-stroke marine engine has an area of 480 mm² and an overall length of 80 mm. The indicator spring scale constant is 1.5 bar per mm. What is the mean indicated pressure (p_mi) of the cylinder?
A.9.0 bar
B.6.0 bar
C.12.0 bar
D.7.5 bar
Explanation: The mean height of the indicator diagram is calculated by dividing the area by the length: 480 mm² / 80 mm = 6.0 mm. Multiplying this average diagram height by the spring constant yields the mean indicated pressure: 6.0 mm × 1.5 bar/mm = 9.0 bar. This value represents the average constant pressure acting on the piston throughout the stroke.
3A six-cylinder, two-stroke marine diesel engine has a cylinder bore of 0.60 m and a piston stroke of 2.0 m. During sea trials at 100 rpm, the measured mean indicated pressure is 15.0 bar (1500 kPa). What is the total indicated power developed by the engine?
A.8,482 kW
B.4,241 kW
C.16,965 kW
D.1,414 kW
Explanation: Cylinder cross-sectional area is A = (π / 4) × (0.60 m)² = 0.28274 m². For a two-stroke engine running at 100 rpm, the firing frequency per cylinder is n = 100 / 60 = 1.6667 strokes per second. The indicated power per cylinder is P_i = p_mi × L × A × n = 1500 kPa × 2.0 m × 0.28274 m² × 1.6667 s⁻¹ = 1,413.7 kW. For 6 cylinders, total indicated power is 1,413.7 kW × 6 = 8,482 kW (approximately 8.48 MW).
4A main propulsion engine delivers a steady brake power of 12,000 kW while consuming 2,160 kg of heavy fuel oil per hour. What is the specific fuel oil consumption (SFOC) of the engine under these operating conditions?
A.180 g/kWh
B.165 g/kWh
C.216 g/kWh
D.195 g/kWh
Explanation: Specific fuel oil consumption is defined as fuel mass flow rate divided by brake power: SFOC = m_fuel / P_b. Converting the hourly consumption into grams gives 2,160 kg/h × 1,000 g/kg = 2,160,000 g/h. Dividing by 12,000 kW yields 2,160,000 / 12,000 = 180 g/kWh, which is a standard baseline value for modern large marine engines.
5A marine diesel engine operates with a specific fuel oil consumption (SFOC) of 175 g/kWh using fuel oil with a lower calorific value (LCV) of 42.7 MJ/kg. What is the brake thermal efficiency of the engine?
A.48.2%
B.42.7%
C.52.5%
D.38.5%
Explanation: One kilowatt-hour equals 3,600 kJ. The heat energy supplied to generate one kWh of brake work is given by SFOC × LCV = 0.175 kg/kWh × 42,700 kJ/kg = 7,472.5 kJ/kWh. Brake thermal efficiency is the work output divided by heat input: η_th = 3,600 kJ / 7,472.5 kJ = 0.4817, or 48.2%.
6An out-of-phase (draw) indicator diagram taken from a medium-speed diesel engine reveals that the peak cylinder pressure (P_max) occurs prematurely at 2° before Top Dead Center (TDC), accompanied by severe mechanical knocking. What is the most likely cause?
A.Fuel injection timing is excessively advanced
B.Fuel injection timing is excessively retarded
C.The fuel injector nozzle holes are partially blocked
D.The scavenge air cooler is heavily fouled on the air side
Explanation: Under normal operation, peak cylinder pressure should occur approximately 10° to 15° after TDC to maximize work transfer to the crank mechanism while keeping mechanical stresses acceptable. If injection begins too early, combustion occurs while the piston is still moving upward in its compression stroke, forcing P_max to peak before TDC and generating rapid pressure rise rates (dp/dθ) that cause violent diesel knock.
7What is the primary function of timed cylinder lubrication in a slow-speed two-stroke crosshead diesel engine?
A.To inject alkaline cylinder oil directly between the piston rings as the piston package ascends past the quills, neutralizing sulfuric acid and minimizing boundary wear
B.To continuously flood the piston crown interior with synthetic oil to remove combustion heat
C.To wash carbon deposits down into the crankcase sump through the stuffing box drainage channels
D.To provide hydraulic pressure to open the exhaust valve spindle at the end of the expansion stroke
Explanation: Modern electronically controlled lubricators (such as Alpha Lubricator or Pulse Lubricating System) inject a precise dose of high-Base Number (BN) cylinder oil directly onto the cylinder liner wall between the piston rings as the ring pack moves upward. This ensures effective boundary lubrication, neutralizes corrosive sulfuric acid produced by fuel sulfur combustion, and prevents excessive abrasive wear without wasteful over-lubrication.
8A watchkeeping marine engineer detects a severe scavenge air fire in cylinder unit #4 of the main two-stroke propulsion engine, characterized by blistering paint on the scavenge door and rising exhaust temperature. What is the correct initial operational procedure?
A.Immediately reduce engine load and speed, cut off fuel delivery to the affected cylinder, maintain cooling water and cylinder lube flow, and extinguish using the fixed scavenge fire system if necessary
B.Stop the engine immediately, open the scavenge doors at once, and spray portable dry powder into the space
C.Increase engine speed to maximum to blow the burning deposits out through the exhaust manifold and economizer
D.Shut off all jacket cooling water to the affected cylinder to prevent thermal shock to the liner
Explanation: The proper response to a scavenge fire is to reduce engine speed to dead slow or stop, cut fuel injection to the affected unit to remove the heat source, and keep coolant and lubrication flowing to prevent seizure and distortion of the piston and liner. Fixed extinguishing systems (such as CO2, high-pressure water mist, or steam) should be activated if the fire does not self-extinguish. Scavenge doors must never be opened while hot, as introducing fresh air can cause a violent backdraft or explosion.
9What thermodynamic mechanism causes turbocharger compressor surging during heavy sea conditions or severe air cooler fouling?
A.The mass airflow drops below the aerodynamic stability limit for the given pressure ratio, causing flow separation on the impeller blades and cyclic airflow reversal
B.The turbine nozzle ring becomes starved of exhaust gas, causing the turbine wheel to rotate in the reverse direction
C.Excessive scavenge air receiver pressure forces high-pressure gas back through the exhaust gas economizer
D.The charge air cooler water mist catcher freezes, causing a complete vacuum at the compressor inlet
Explanation: Compressor surging occurs when the operating point on the compressor performance map crosses to the left of the surge line. When downstream air resistance rises (e.g. from fouled cooler fins or engine load reduction) or airflow fluctuates rapidly in heavy seas, the air velocity through the impeller blades becomes insufficient to overcome the high backpressure. Aerodynamic stalling occurs, causing high-pressure air to surge violently backward through the compressor with loud banging and severe mechanical vibrations.
10Why are large marine two-stroke diesel engines designed with a crosshead and guide slippers rather than a trunk piston construction?
A.To transfer transverse connecting-rod side thrust entirely to the engine frame guide shoes, allowing the piston to move with pure axial reciprocating motion and zero side load on the cylinder liner
B.To allow the piston to rotate freely inside the cylinder liner during each stroke to equalize wear
C.To eliminate the need for high-pressure lubricating oil in the bottom-end crankpin bearings
D.To reduce the overall vertical engine height and optimize cargo hold volume above the machinery space
Explanation: In a crosshead engine, the angular swing of the connecting rod creates significant transverse side forces that are completely absorbed by the crosshead slippers sliding on the engine frame guide plates. This isolates the piston rod and piston from lateral thrust, ensuring the piston travels purely vertically along the cylinder liner centerline. This design minimizes liner ovality, allows tall stroke-to-bore ratios exceeding 4:1, and permits complete physical separation of the combustion space from the crankcase.

About the Maskinmestereksamen Exam

Maskinmestereksamen leads to Professionsbachelor som maskinmester under BEK nr. 1348 af 23/11/2018. It is a broad land-and-sea engineering and management degree; students seeking maritime certification must complete the maritime elective and prescribed practice. Søfartsstyrelsen lists that route as leading first to Vagthavende maskinmester and, after the required service, up to Skibsmaskinchef. Danish is the default assessment language for Danish-delivered programmes, subject to institutional alternatives. This English MCQ bank focuses on maritime syllabus content and is not an official translation or substitute for written, oral, laboratory, project, or practical assessment.

Assessment

The statutory 270 ECTS comprises 130 ECTS of mandatory technical and management content, 45 ECTS of workshop and safety preparation, 20 ECTS of electives including the maritime option, 60 ECTS of practice, and a 15 ECTS bachelor project. Entry-route credit can reduce the remaining study load.

Time Limit

Varies by module and institution; no single national duration is published

Passing Score

02 where the Danish 7-point scale is used, or pass where an assessment is graded pass/fail

Exam Fee

Assessment is part of the degree; the current Søfartsstyrelsen certificate-of-competency application fee is DKK 855 when applicable. (Danish Marine Engineering Colleges (MSK, AAMS, FMS, MARTEC, SIMAC) in conjunction with Søfartsstyrelsen and Uddannelses- og Forskningsministeriet)

Maskinmestereksamen Exam Content Outline

25 practice questions

Marine Diesel Engines & Power Plants

Large 2-stroke crosshead diesel engines, 4-stroke auxiliary engines, indicator diagrams, mean indicated pressure (mep), indicated and brake power, SFOC, thermal efficiency, turbocharging, charge air cooling, dual-fuel/gas engines, and auxiliary boilers.

20 practice questions

Electrical Engineering & High-Voltage Systems

Marine synchronous generators, AVR and reactive power, governor droop and active power sharing, paralleling synchroscope, selective protection discrimination, high-voltage safety (3.3 kV to 11 kV), VFDs, and emergency switchboard auto-start compliance.

15 practice questions

Automation, Instrumentation & Process Control

Feedback control loops, PID tuning and controller action, PLC hardware and ladder logic, 4–20 mA instrumentation loops, Pt100 RTD and thermocouple temperature measurement, UMS certification requirements, and safety shutdown systems.

15 practice questions

Auxiliary Machinery & Fluid Systems

Centrifugal and displacement pumps, cavitation and NPSH, affinity laws, centrifugal purifiers and clarifiers, gravity disc sizing, oily water separators and 15 ppm bilge alarms, vacuum distillers, and electro-hydraulic steering gear.

10 practice questions

Refrigeration, HVAC & Marine Thermodynamics

Vapor-compression refrigeration cycles, P-h diagrams, COP computations, ammonia (R717) and CO2 (R744) safety, psychrometric AC processes, and shell-and-tube heat exchanger LMTD calculations.

15 practice questions

Marine Maintenance, Safety & Environmental Regulations

Planned maintenance systems, vibration analysis, lube oil analysis (viscosity, BN, insolubles), MARPOL Annex VI regulations (EEDI, EEXI, CII, 0.50% global / 0.10% ECA fuel caps, Tier III NOx), ISO 8217 fuel specs, engine room fire extinguishing, and enclosed space entry safety.

How to Pass the Maskinmestereksamen Exam

What You Need to Know

  • Passing score: 02 where the Danish 7-point scale is used, or pass where an assessment is graded pass/fail
  • Assessment: The statutory 270 ECTS comprises 130 ECTS of mandatory technical and management content, 45 ECTS of workshop and safety preparation, 20 ECTS of electives including the maritime option, 60 ECTS of practice, and a 15 ECTS bachelor project. Entry-route credit can reduce the remaining study load.
  • Time limit: Varies by module and institution; no single national duration is published
  • Exam fee: Assessment is part of the degree; the current Søfartsstyrelsen certificate-of-competency application fee is DKK 855 when applicable.

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

Maskinmestereksamen Study Tips from Top Performers

1Master indicator diagram interpretation: learn to calculate indicated power from P-V diagrams using P = (p_mi * L * A * n * z) / 60 and correlate P-theta anomalies to injection timing and compression faults.
2Review AC alternator load-sharing principles: understand how prime mover speed droop governs active power (kW) division while AVR excitation control dictates reactive power (kVAR) distribution.
3Practice thermodynamic and fluid flow formulas: ensure you can reliably calculate specific fuel oil consumption (SFOC), thermal efficiency, pump NPSH available versus required, and heat exchanger LMTD.
4Familiarize yourself with MARPOL Annex VI statutory limits: be certain of global sulfur caps (0.50% m/m), Emission Control Area limits (0.10% m/m), Tier II vs Tier III NOx standards, and EEXI/CII decarbonization mechanisms.
5Understand UMS automation criteria: review class requirements for bridge alarm panels, dead-man alarms, duty engineer cabins, and automatic fail-safe shutoffs for scavenge fires, oil mist, and jacket water loss.

Frequently Asked Questions

What qualifications and certificates does the Maskinmester education grant?

Graduates earn the academic title Professionsbachelor som maskinmester (Bachelor of Technology Management and Marine Engineering). Maritimely, it satisfies the STCW requirements for Officer in Charge of an Engineering Watch (STCW III/1, Vagthavende maskinmester), and with prescribed qualifying sea time, Second Engineer (STCW III/2, 1. maskinmester) and Chief Engineer (STCW III/2, Skibsmaskinchef) unlimited. Land-based graduates also qualify for Danish electrical authorization (autoriseret el-installatør) after fulfilling statutory supplementary requirements.

Which educational institutions offer the Maskinmester degree in Denmark?

The degree is offered at five accredited institutions: Maskinmesterskolen København (MSK), Aarhus Maskinmesterskole (AAMS), Fredericia Maskinmesterskole (FMS), MARTEC in Frederikshavn, and Svendborg International Maritime Academy (SIMAC).

What is the duration and structure of the study program?

The statutory programme totals 270 ECTS. Its components include 45 ECTS of workshop/safety preparation, 130 ECTS of mandatory technical and management content, 20 ECTS of electives, 60 ECTS of practice, and a 15 ECTS bachelor project; applicable credit for prior vocational preparation changes the effective study route. The bachelor project has a written project and oral component with external assessment.

What language is used in the education and examinations?

Danish is the default assessment language for a Danish-delivered programme under the applicable examination rules, while institutions may permit or deliver specified work in another language. Maritime English remains professionally important. This bank's English presentation is a study adaptation, not evidence that every official assessment is offered in English.

How does this practice question bank relate to the official degree examinations?

This 100-question practice bank is an independent English-language study tool designed for revision and testing comprehension of essential marine engineering concepts, calculations, and international statutory rules. It does not replace official semester-based college examinations, practical simulator assessments, or the final bachelor project defense.