100+ Free BTEB Diploma in Marine Engineering Examination Practice Questions

Prepare for the Bangladesh Technical Education Board Diploma in Marine Engineering Examination exam with instant access — no signup required.

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2026 Statistics

Key Facts: BTEB Diploma in Marine Engineering Examination Exam

100

Marine Practice MCQs

Open Exam Prep

40%

Pass Mark per Subject

BTEB Probidhan 2022

4.00 GPA

Grading Scale

BTEB Regulations

4 Years

Program Duration

BTEB Curriculum

BIMT

Premier Institute

BMET / BTEB

5 Domains

Core Subject Groups

Marine Syllabus

The BTEB Diploma in Marine Engineering examination series assesses comprehensive knowledge of marine power plants, ship hydrostatics and stability, auxiliary machinery, shipboard electrical distribution, and international maritime safety codes under Probidhan 2022. This free practice bank features 100 realistic, curriculum-aligned multiple-choice questions with step-by-step technical explanations.

Sample BTEB Diploma in Marine Engineering Examination Practice Questions

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

1In a large two-stroke marine diesel engine, how many revolutions of the crankshaft complete one thermodynamic power cycle?

A.1 revolution (360° of crank rotation)

B.2 revolutions (720° of crank rotation)

C.0.5 revolution (180° of crank rotation)

D.4 revolutions (1440° of crank rotation)

Explanation: In a two-stroke marine diesel engine, the complete operating cycle (scavenging, compression, combustion/expansion, and exhaust) occurs in two piston strokes, which corresponds to exactly one complete revolution (360°) of the crankshaft.

2An 8-cylinder four-stroke marine diesel engine has a cylinder bore of 0.40 m, a stroke of 0.50 m, runs at 600 RPM, and develops a mean indicated pressure (P_mip) of 2.0 MPa. What is the total indicated power (IP) developed by the engine?

A.5.03 MW

B.10.05 MW

C.2.51 MW

D.0.63 MW

Explanation: Cylinder cross-sectional area A = (π/4) · (0.40)² = 0.1257 m². In a four-stroke engine, each cylinder fires once every two crankshaft revolutions, so at 600 RPM the power cycles per second are n = 600 / 120 = 5 s⁻¹. Indicated power per cylinder = P_mip · L · A · n = 2.0 × 10⁶ Pa × 0.50 m × 0.1257 m² × 5 s⁻¹ ≈ 628,319 W ≈ 0.628 MW. For 8 cylinders: total IP = 8 × 0.628 MW ≈ 5.03 MW.

3A 6-cylinder two-stroke marine diesel engine has a bore of 0.6 m, a stroke of 2.0 m, operates at 100 RPM, and has an indicated mean effective pressure of 1.5 MPa. What is the total indicated power (IP) developed by the engine?

A.8.48 MW

B.4.24 MW

C.16.96 MW

D.1.41 MW

Explanation: Cylinder area A = (π/4)(0.6)² = 0.28274 m². For a 2-stroke engine, power cycles per second n = 100 / 60 rev/s. Indicated Power for 6 cylinders = 6 × (P_mip · L · A · n) = 6 × (1.5 × 10⁶ Pa × 2.0 m × 0.28274 m² × 100/60 s⁻¹) = 8,482,295 W ≈ 8.48 MW.

4What is indicated by a delayed rise in peak pressure and afterburning on an out-of-phase (draw) indicator diagram taken from a marine diesel cylinder?

A.Late fuel injection timing or poor fuel atomization

B.Early fuel injection timing

C.Excessive cylinder compression pressure

D.Exhaust valve opening too early

Explanation: An out-of-phase indicator diagram (taken 90° out of phase to expand the combustion region) clearly illustrates fuel ignition timing. A sluggish pressure rise after top dead center and prolonged combustion (afterburning) into the expansion stroke indicates retarded (late) fuel injection or degraded fuel atomization from fouled injector nozzles.

5Why is Heavy Fuel Oil (HFO) preheated to approximately 130°C–140°C before entering the marine diesel engine fuel injection pumps?

A.To reduce its kinematic viscosity to 10–15 cSt for optimal nozzle atomization

B.To vaporize the fuel completely before entering the cylinder

C.To remove asphaltic sludge and catalytic fines

D.To increase the calorific value of the fuel oil

Explanation: Residual Heavy Fuel Oil (HFO) is highly viscous at ambient temperatures (up to 380–700 cSt at 50°C). Preheating in the ship's fuel conditioning module reduces viscosity to the recommended 10–15 cSt injection viscosity, ensuring fine droplet atomization, rapid mixing with scavenge air, and complete combustion without nozzle fouling.

6In a modern crosshead 2-stroke marine diesel engine, what is the primary role of the Crosshead and Guide Shoe assembly?

A.To absorb lateral thrust forces from the connecting rod and ensure the piston rod moves purely axially

B.To lubricate the crankshaft main bearings under high pressure

C.To drive the exhaust valve hydraulic actuator pump

D.To reduce the overall vertical height of the marine engine

Explanation: The crosshead connects the piston rod to the connecting rod. As the connecting rod swings, the crosshead guide shoes transfer horizontal side thrust directly to the engine frame guide plates. This ensures the piston rod experiences only pure axial reciprocating motion, preventing side loads on the cylinder liner and allowing a stuffing box to seal the crankcase from combustion debris.

7What is the function of the Piston Rod Stuffing Box in a two-stroke crosshead marine diesel engine?

A.To prevent contaminated cylinder drain oil and acidic combustion products from entering the crankcase oil

B.To prevent high-pressure fuel oil from leaking into the cooling jacket

C.To provide high-pressure lubrication to the gudgeon pin bearing

D.To dampen torsional vibrations of the main crankshaft

Explanation: The diaphragm stuffing box fits around the reciprocating piston rod between the scavenge air space and the crankcase. Its upper scraper rings prevent dirty, acidic cylinder unburned oil and combustion debris from contaminating the system lubricating oil, while its lower scraper rings prevent crankcase oil from being carried up into the scavenge space.

8Why does marine diesel cylinder lubricating oil maintain a high Total Base Number (TBN, e.g. 40 to 100 mg KOH/g)?

A.To neutralize sulfuric acid (H₂SO₄) formed from the combustion of sulfur in heavy fuel oil

B.To increase the flash point of the lubricating oil

C.To reduce the viscosity of the oil at high cylinder temperatures

D.To prevent the formation of biological bacteria in the cooling water

Explanation: Heavy Fuel Oil contains sulfur (up to 0.50% VLSFO or 3.5% HSFO with scrubbers). Combustion produces sulfur trioxide (SO₃), which combines with water vapor below the dew point to form corrosive sulfuric acid (H₂SO₄). Cylinder oil with high TBN (alkaline additive reserve) chemically neutralizes this acid, preventing cold corrosion of cylinder liners and piston rings.

9What is the primary operational cause of Turbocharger Surging in a marine diesel engine?

A.Sudden reduction in engine load or fouled scavenge air ports/turbine nozzles causing backflow through the compressor

B.Excessive lubricating oil pressure to turbocharger journal bearings

C.Low jacket cooling water temperature

D.Operating the main engine at constant rated full speed in calm sea conditions

Explanation: Surging occurs when the pressure ratio across the compressor wheel exceeds its design limit for a given mass flow rate. When air delivery stalls (e.g. due to rapid engine deceleration, heavy weather pitch, fouled exhaust nozzles, or dirty scavenge ports), high-pressure air in the scavenge receiver surges backwards through the compressor blades with violent noise and vibration.

10In the event of a Scavenge Fire in a running 2-stroke marine diesel engine, what is the immediate recommended operational response?

A.Slow down the engine, cut off fuel injection to affected cylinder(s), engage auxiliary blowers, and apply fixed scavenge extinguishing medium (CO₂ or steam)

B.Increase engine speed to blow out the fire through the exhaust valve

C.Open the scavenge inspection doors immediately to locate the flames

D.Drain all crankcase lubricating oil into the double bottom tank

Explanation: In a scavenge fire, engine speed must be reduced immediately, fuel cut off from the affected cylinder, and cylinder lubrication increased to prevent piston seizure. If the fire persists, stop the engine, keep turning gear engaged with cooling water circulating, and discharge the fixed scavenge extinguishing system (CO₂ or steam). Never open scavenge doors while hot, as incoming fresh air can cause a violent backdraft or explosion.

About the BTEB Diploma in Marine Engineering Examination Exam

The Diploma in Marine Engineering (Marine Technology Code 79 under Probidhan 2022) is an authoritative 4-year technical diploma program administered by the Bangladesh Technical Education Board (BTEB). Offered at premier institutions such as the Bangladesh Institute of Marine Technology (BIMT) Narayanganj and government marine technology institutes, the curriculum delivers rigorous theoretical and practical training in Marine Diesel Engines, Naval Architecture and Ship Stability, Marine Auxiliary Systems, Boilers, Shipboard Electrical Automation, Marine Refrigeration, and STCW/SOLAS/MARPOL maritime safety regulations. While this academic diploma is distinct from the Department of Shipping (DoS) seafarer Certificate of Competency (CoC) licensing examinations, it provides the core academic foundation for prospective marine engineers and shipyard technical officers in Bangladesh. This free practice test provides 100 curriculum-aligned MCQs with detailed explanations.

Assessment

Semester final examinations administered centrally by BTEB across specialized marine institutes, combining written theory papers (2.5 to 3 hours per subject), continuous class assessments, and marine workshop/laboratory practicals.

Time Limit

2.5 to 3 hours per paper

Passing Score

40% (Grade D / Grade Point 2.00 minimum on a 4.00 scale) separately across theoretical and practical components

Exam Fee

BDT 1,500 - 2,500 (Bangladesh Technical Education Board (BTEB))

BTEB Diploma in Marine Engineering Examination Exam Content Outline

25%

Marine Diesel Engines & Propulsion

Two-stroke and four-stroke marine diesel engines, turbocharging, fuel injection systems, cooling, lubrication, starting air systems, and performance analysis.

25%

Naval Architecture & Ship Stability

Hull geometry, displacement, hydrostatic curves, center of gravity/buoyancy, metacenter, GM/GZ transverse stability, trim, draft, and hull resistance.

20%

Marine Auxiliary Machinery & Boilers

Centrifugal and positive displacement pumps, oily water separators, heat exchangers, marine auxiliary boilers, fresh water generators, steering gear, and deck machinery.

15%

Marine Electrical Systems & Automation

Shipboard power generation, main and emergency switchboards, alternator paralleling, motor controllers, automation, and alarm monitoring systems.

15%

Marine Refrigeration, HVAC & Maritime Safety

Marine vapor compression refrigeration, cargo hold ventilation, HVAC systems, SOLAS, MARPOL, STCW safety protocols, firefighting, and life-saving appliances.

How to Pass the BTEB Diploma in Marine Engineering Examination Exam

What You Need to Know

Passing score: 40% (Grade D / Grade Point 2.00 minimum on a 4.00 scale) separately across theoretical and practical components
Assessment: Semester final examinations administered centrally by BTEB across specialized marine institutes, combining written theory papers (2.5 to 3 hours per subject), continuous class assessments, and marine workshop/laboratory practicals.
Time limit: 2.5 to 3 hours per paper
Exam fee: BDT 1,500 - 2,500

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

BTEB Diploma in Marine Engineering Examination Study Tips from Top Performers

1Master the 2-stroke crosshead marine diesel cycle, fuel injection timing, and indicator diagram fault interpretation (e.g., early/late ignition, afterburning).

2Practice ship stability numerical problems involving metacenter height (GM), shift of center of gravity (KG), free surface effect, and list/trim calculations.

3Review the working principle and regulatory discharge standards for 15 ppm Oily Water Separators (OWS) under MARPOL Annex I.

4Understand marine auxiliary boiler water treatment (alkalinity, phosphate, dissolved oxygen control) and boiler mountings/safety valve operation.

5Memorize SOLAS fire safety classifications and emergency generator automatic start and load-connection requirements.

Frequently Asked Questions

What is the BTEB Diploma in Marine Engineering?

It is a 4-year (8-semester) academic diploma awarded by the Bangladesh Technical Education Board (BTEB), primarily taught at institutes like BIMT Narayanganj, covering comprehensive marine mechanical and naval technology competencies.

How is this diploma different from the Department of Shipping (DoS) CoC exams?

The BTEB Diploma in Marine Engineering is an academic technical qualification. The Department of Shipping (DoS) Certificate of Competency (CoC) exams are professional statutory licensing exams required under IMO STCW conventions to sail as a certified shipboard marine engineer officer.

What are the core subject areas tested in the semester final exams?

Key areas include Marine Diesel Engines, Naval Architecture and Stability, Marine Auxiliary Systems, Boilers, Shipboard Electrical Power, Marine Refrigeration and Air Conditioning, and Maritime Safety Regulations.

What is the minimum passing grade under BTEB Probidhan 2022?

Candidates must achieve at least 40% (Grade D / GPA 2.00 on a 4.00 scale) separately in theory final, theory continuous, and practical assessments for each subject.

Are the exam questions available in English?

Yes. While official BTEB papers are bilingual in Bangla and English, technical maritime terminology is standard in English. This bank provides an English-language MCQ study adaptation.