Advanced Marine Power Plant MARE 2032 Class Test 2

A set of 100 vocabulary flashcards covering marine engineering concepts including bearings, shafts, crankshafts, and turbochargers based on the MARE 2032 lecture and MARE 2032 lecture materials and tests.

Stern tube bearing

Type of bearing used to support the tail shaft in a marine diesel engine.

Lignum Vitae

Material commonly used for water-lubricated stern bearing in traditional designs.

Muff coupling

Type of coupling specifically designed for easy outboard withdrawal of the tail shaft.

Radial face seals

Specialized seals used at the aft end of an oil-lubricated stern bearing, often including springs, to prevent oil leakage.

Two gravity oil tanks

Typical lubricant design for oil-lubricated stern tube bearings in ships with a large change in draft, used with an automatic pump.

Aftermost tunnel bearing

Bearing type featuring only bottom shells used at the tail shaft's aftermost position to counteract propeller mass and vertical thrust.

Intermediate shaft coupling bolts

Bolts used in shafting to connect adjacent shaft segments and transmit torque.

Two fwd. seals

A common sealing arrangement used to prevent oil leakage within the engine room.

Nozzle rings

Turbocharger components designed to convert kinetic energy of exhaust gases or guide air to the impeller.

Turbine side water washing risk

Associated with a high risk of corrosion, thermal stress, and mechanical stress.

Fully built crankshaft

Crankshaft construction method that allows for section repairs if necessary.

Crankshaft misalignment

A condition which results in the increased wear of main bearings.

Main thrust block

Component in marine shafting that transfers propeller thrust to the hull and limits axial movement of the shaft.

Thrust collar

Component identified as No. 1 and No. 3 in the thrust block diagram provided in the transcript.

Thrust Pad

Component identified as No. 6 in the thrust block diagram used to absorb ahead or astern thrust.

Holding down bolts

Specific bolts used to attach the thrust block to the tank top.

Blower impeller

Part of the turbocharger that transfers air from an axial to a radial direction.

Air cooler

Device used after the turbocharger to cool compressed air and increase its density.

Turbocharger bearings

Components that reduce friction and aid in efficiency; they cannot be lubricated by simple gravity feed systems for all types.

Solid forged crankshaft

A type of crankshaft offering higher fatigue strength than fully built versions due to continuous grain flow.

Shrink fitting

A process involving heating webs and journals to achieve a tight interference fit in crankshaft construction.

Deflection readings

Crankshaft measurements that must account for hull deflection and bedplate distortion to ensure accuracy.

Air start valve leakage

Detected by local overheating of the pipe adjacent to the valve during engine operation.

Bursting disk

Safety device typically fitted in the air receiver to prevent starting air line explosions.

Crankcase relief valve free area

Requirement that the free area must be at least $45\,\text{cm}^2$ per valve.

Minimum crankcase relief area ratio

Requirement that the total free area is not less than $115\,\text{cm}^2$ per cubic meter of crankcase volume.

Inducer

Turbocharger component that guides fresh air to the impeller, transitioning flow from horizontal to vertical.

Impeller

Component that moves air via shaft rotation driven by exhaust gases.

Turbocharger Shaft

Part that transmits rotational energy within the turbocharger unit.

Turbocharger Body

The housing for components that must be air-tight to maintain pressure.

Nozzle Ring

Component identified as No. 5 in the blower diagram.

Volute casing

The component identified as No. 6 in the turbocharger blower diagram.

Liganam wood

A distractor term for Lignum Vitae used in the marine diesel exam.

Muffler coupling

An incorrect distractor name for the muff coupling.

Tapered coupling

A coupling type specifically mentioned as an option for easy outboard withdrawal.

Lip seals

Alternative name for radial face seals with or without springs at the aft end of a stern bearing.

Thrust shaft

Specific segment of shafting used in the thrust block assembly.

Propeller mass

A downwards force counteracted by the bottom shells of the aftermost tunnel bearing.

Vertical thrust

Force exerted at the tail shaft end that requires a specific tunnel bearing with bottom shells.

Torque

The rotational force transmitted through the intermediate shaft coupling bolts.

Fatigue strength

A material property that is notably higher in solid forged crankshafts compared to fully built ones.

Continuous grain flow

The structural characteristic of solid forged crankshafts that contributes to their high fatigue strength.

Interference fit

The specific tight connection type achieved through the shrink fitting of crankshaft webs and journals.

Bedplate distortion

A mechanical change in the engine foundation that must be accounted for in crankshaft deflection readings.

Hull deflection

The bending of the ship's structure that affects the accuracy of internal engine alignment readings.

Starting air line explosion

A hazardous event prevented by the installation of a bursting disk in the air receiver.

Air receiver

The storage vessel in the air starting system where the bursting disk is typically located.

Thermal stress

A specific risk identified when water washing the turbine side of a turbocharger.

Crank webs

Two components that make up a standard crankshaft assembly along with one crankpin and two journals.

Crankpin

The single component in a typical crankshaft assembly that connects the webs.

Journals

The two components of a crankshaft assembly that serve as the main support points.

Ahead thrust

The forward force generated by the propeller that is absorbed by the thrust block pads.

Astern thrust

The backward force generated by the propeller in reverse that is absorbed by the thrust block pads.

Oil bath

The lubrication environment used within a marine thrust block.

White metal bearing

Bearing material used in the stern tube sealing arrangement diagram.

Storage Tank

Component in the stern tube oil-lubricated system used to hold oil reserves.

Oil mist detector

An engine safety device the student was required to draw during the class test.

MARE 2032

The course code for Advanced Marine Power Plant at Georgian.

July 29th, 2026

The date indicated on the transcript for the Advanced Marine Power Plant Class Test 2.

Tail shaft

The final section of the propeller shaft which is supported by the stern tube bearing.

Thordon oil bearing

A distractor term for stern bearing lubrication types mentioned in the exam.

Mechanical stress

One of the primary risks, alongside corrosion and thermal stress, during turbocharger turbine washing.

Axial to radial direction

The specific flow path change of air within the turbocharger blower impeller.

Compressed air density

The physical property increased by using an air cooler after the turbocharger.

Gravity feed system

A simple lubrication method that is not applicable for all turbocharger bearing types.

Local overheating

The indicator used to detect a leaking air start valve during engine operation.

Section A

The portion of the Class Test 2 worth 30 points, consisting of multiple choice and true/false questions.

Section B

The portion of the Class Test 2 worth 20 points, consisting of drawings and identifications.

50 Points

The total point value for the MARE 2032 Class Test 2.

Functional drawing

The specific requirement for diagrams in the test to be considered for full credit.

Axial movement

The specific longitudinal movement of the shaft limited by the main thrust block.

Section repairs

The maintenance advantage provided by fully built or semi-built crankshaft constructions.

Welded crankshaft

A type of crankshaft construction mentioned as a distractor option in the test.

Crankcase relief valve

A safety valve that must have a minimum free area of $115\,\text{cm}^2$ per cubic meter of crankcase volume.

Shaft boss

The part of the propeller assembly identified in the stern tube sealing diagram.

Gland packing

A type of seal mentioned as a distractor for modern oil-lubricated stern bearings.

Tank top

The structural part of the ship's bottom where the thrust block foundation is bolted.

Axial direction

The initial direction of air entering the turbocharger blower before it is transferred by the impeller.

Radial direction

The exit direction of air from the turbocharger blower impeller.

Shaft rotation

The mechanical action that drives the impeller to move air and exhaust gases.

Air tight housing

A requirement for the turbocharger body to effectively hold pressure during operation.

Rotational energy

The energy transmitted by the turbocharger shaft between the turbine and the blower.

Friction reduction

The primary function of the bearings located within the turbocharger assembly.

Propeller mass thrust

The combined force of weight and propulsion that the aftermost tunnel bearing must manage.

Oil filters

Components in the stern tube sealing arrangement used to clean the oil before supply.

Sample returner

Component in the stern tube system used to check the condition of the oil.

Gravity Tank

The oil reservoir used to provide pressure in the stern tube sealing arrangement.

Shaft segments

Individual pieces of the marine propulsion line connected by intermediate shaft bolts.

Kinetic energy conversion

The process performed by nozzle rings on exhaust gases in a turbocharger.

Bedplate

The foundation structure of the engine that may suffer distortion affecting crankshaft deflection.

Starting air receiver

The pressurized vessel in the engine starting system equipped with safety devices like bursting disks.

Marine diesel engine

The primary power unit discussed in MARE 2032 that utilizes tail shafts and stern bearings.

Outboard withdrawal

The removal of the tail shaft toward the outside of the ship.

Automatic pump

The device used in conjunction with two gravity tanks for stern tube lubrication in high-draft-change ships.

Crankcase explosion relief valves

Safety valves required on engine crankcases to mitigate the effects of internal explosions.

Cooling compressed air

The primary action of the air cooler, which consequently increases air density.

Spring-loaded seals

Typically radial face or lip seals used to maintain pressure against the rotating shaft to prevent leaks.

Thrust Shaft Segment

The specific portion of the shafting that contains the thrust collar and interacts with the thrust block.

Georgian

The educational institution where Matthew Barney took the MARE 2032 Class Test 2.

50 Mins

The total time duration allotted for the Class Test 2 according to the instructions.