Marine Power Plant Diesel Engine Systems
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Questions and Answers

What is the role of the reference tube in the crankcase oil mist detector?

  • To provide electrical current to sensors
  • To measure the oil mist level directly
  • To contain clean air for comparison (correct)
  • To extract crankcase vapors
  • What does the photo-electric cell in the crankcase oil mist detector do?

  • Generates heat to evaporate the oil mist
  • Measures the temperature of the crankcase
  • Creates an electric current based on light power (correct)
  • Circulates air in the crankcase
  • Which component of the crankcase oil mist detector is responsible for drawing crankcase vapors?

  • Mirror
  • Selector
  • Fan (correct)
  • Measuring tube
  • What is the purpose of the selector in the crankcase oil mist detector?

    <p>To rotate and collect samples from different units (B)</p> Signup and view all the answers

    What happens when the oil mist level exceeds the normal threshold in a crankcase oil mist detector?

    <p>An alarm is triggered (B)</p> Signup and view all the answers

    Which part is NOT part of the crankcase oil mist detector?

    <p>Crankshaft bearings (A)</p> Signup and view all the answers

    What do the mirror, lamp, and lenses achieve in the crankcase oil mist detector?

    <p>They supply and reflect equal light to the tubes (D)</p> Signup and view all the answers

    Which of the following statements best describes how the oil mist is detected?

    <p>By comparing the light intensity in reference and measuring tubes (A)</p> Signup and view all the answers

    Which method is NOT used to start a diesel engine?

    <p>Hydraulic starter system (A)</p> Signup and view all the answers

    What is the primary function of the starting air system in a medium speed diesel engine?

    <p>To initiate the engine's crankshaft rotation (A)</p> Signup and view all the answers

    Which component is essential for the operation of the crankcase oil mist detector?

    <p>Detection chamber (D)</p> Signup and view all the answers

    In starting air systems, which type of diesel engine is the 2-stroke system primarily designed for?

    <p>Low-speed diesel engines (C)</p> Signup and view all the answers

    What does the auxiliary diesel engine starting system primarily utilize for operation?

    <p>Starting air motor (C)</p> Signup and view all the answers

    Which of the following best describes the crankcase oil mist detector's purpose?

    <p>To detect oil mist indicating potential engine problems (C)</p> Signup and view all the answers

    What is the typical application of the electric starter motor for diesel engines?

    <p>Identical to the system used in lifeboat engines (B)</p> Signup and view all the answers

    In tasks regarding diesel engine operation, what is typically included in diagrams for educational purposes?

    <p>The complete operations and functions of system components (C)</p> Signup and view all the answers

    Flashcards

    Crankcase Oil Mist Detector

    A device used in marine diesel engines to detect the level of oil mist in the crankcase, and alarm when it exceeds a safe level.

    Reference Tube

    A sealed tube containing clean air, used as a control in the oil mist detector.

    Measuring Tube

    A tube that passes crankcase vapor/samples; measures the oil mist level.

    Photo-electric Cells

    Sensors that measure the difference in light intensity between reference and measuring tubes.

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    Fan

    Draws crankcase vapors/samples through the measuring tube.

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    Selector

    Rotates to take samples from various engine compartments.

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    Mirror, Lamp and Lenses

    Provide and reflect equal light to both reference and measuring tubes for accurate comparisons.

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    Lubricating Oil Splashing

    Creates the oil mist inside the crankcase.

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    Diesel Engine Starting Methods

    Different ways to start a diesel engine, such as manual cranks, electric motors, air motors, and air systems.

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    Auxiliary Diesel Engine Starting System

    A system used to start medium-speed diesel engines, similar to onboard generators.

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    Main Diesel Engine Starting System

    A system used to start low-speed diesel engines, like main ship engines.

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    2-Stroke Engine Starting Air System

    A starting system for two-stroke diesel engines using compressed air.

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    4-Stroke Engine Starting Air System

    A starting system for four-stroke diesel engines using compressed air.

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    Starting Air Motor

    A motor that uses compressed air to start a diesel engine.

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    Electric Starter Motor

    An electric motor for starting a diesel engine.

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    Oil Mist Detector

    A device that detects oil mist (particles) in exhaust.

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    Study Notes

    Marine Power Plant (DMARPOWER)

    • Course: Semester 1, 2023-2024
    • Instructor: Chief Eng. Hamid Reza Soltani
    • Institution: International Maritime College Oman

    Lesson 11 and 12: Marine Power Plant (Deck Officer) - Diesel Engine Operating Systems (Part 3 and 4)

    • Focus on the diesel engine operation and systems
    • Covers diesel engine components and how they work together
    • Learning objectives include understanding crankcase oil mist detector functions, and auxiliary diesel engine starting systems (using diagrams), including various starting systems

    Crankcase Oil Mist Detector (Task 9)

    • Function: Detects oil mist in the crankcase
    • Operation: Engine lubrication oil splashes around the crankshaft, creating mist within the crankcase.
    • The mist is not ignitable.
    • The detector measures oil mist levels. Warnings are triggered when these levels exceed normal values.

    Diesel Engine Starting System

    • Explained as various methods
    • Methods include:
      • Manual handle or pulling wire
      • Electric starter motor and battery (same as emergency generator and lifeboat engine)
      • Starting air motor (same as diesel generator)
      • Staring air system (same as main engine)

    Auxiliary Diesel Engine Starting System (4-Stroke) (Task 10)

    • Used to start medium-speed diesel engines
    • The system is a starting air system, same as diesel generators onboard
    • Diagrams show the system process for auxiliary diesel engine starting
    • Discussion of component functions and the engine starting process is required

    Main Diesel Engine Starting System (2-Stroke) (Task 11)

    • Explains the cross-head 2-stroke diesel engine starting air system
    • Similar to the main engines onboard the vessel
    • Diagram shows the air system and its components and how they relate to engine starting
    • Full system operation, function of components, and discussion of engine starting process are expected

    References

    • Wharton, A.J. (1995). Diesel Engines (3rd ed.). Oxford: Butterworth Heinemann.
    • Various online sources provided details on different types of oil mist detectors, their functions, and systems.

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    Related Documents

    Week 7 Parts 1 and 2-DMP-Y4 PDF

    Description

    This quiz covers the operating systems of diesel engines specifically in the context of marine power plants. Focus areas include the crankcase oil mist detector's function and various diesel engine starting systems. Understand the components and operations critical for deck officers in marine engineering.

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