Yacht Engineer Certification Exam: Operational Procedures and Ship Construction

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Questions and Answers

What is the purpose of Merchant Shipping Notices?

To provide important information and instructions regarding shipping regulations and safety.

What is the purpose of Marine Guidance Notes?

To provide guidance and recommendations on specific maritime procedures or practices.

What is the purpose of Marine Information Notes?

To disseminate general information and updates relevant to the maritime industry.

List four different engine operating parameters to be recorded for an electrical alternator driven by an auxiliary diesel engine.

<ol> <li>Temperature 2. Pressure 3. Fuel consumption 4. Oil level</li> </ol>
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List three different generator output parameters to be recorded for an electrical alternator driven by an auxiliary diesel engine.

<ol> <li>Voltage 2. Current 3. Frequency</li> </ol>
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State three engine operating parameters that will increase as the load is increased on the alternator, with reasons.

<ol> <li>Temperature: Due to increased workload. 2. Fuel consumption: More power required. 3. Pressure: Higher demand on the engine.</li> </ol>
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What is the purpose of a planned maintenance system?

<p>To schedule and manage regular maintenance tasks to ensure the continued operation and reliability of equipment.</p>
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State three parameters on which planned maintenance may be based.

<ol> <li>Time intervals 2. Usage hours 3. Manufacturer recommendations</li> </ol>
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How can an approved planned maintenance system influence classification society requirements?

<p>An approved planned maintenance system can influence classification society requirements by demonstrating that the vessel is being properly maintained according to established procedures and schedules. This can lead to more favorable treatment from the classification society in terms of survey intervals, extent of surveys, and acceptance of machinery condition.</p>
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For the purpose of the garbage record book under MARPOL Annex V, list the nine categories into which garbage is grouped.

<p>The nine categories of garbage in the garbage record book are: 1) Plastics, 2) Food wastes, 3) Domestic wastes, 4) Cooking oil, 5) Incinerator ashes, 6) Operational wastes, 7) Cargo residues, 8) Animal carcasses, 9) Fishing gear.</p>
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Describe the biological operating principle of an aerobic sewage treatment plant, and explain the dangers if a supply of oxygen is not present.

<p>An aerobic sewage treatment plant relies on aerobic bacteria to break down organic matter in the sewage. These bacteria require a constant supply of oxygen to survive and function. If the oxygen supply is interrupted or insufficient, the aerobic bacteria will die off, and the treatment process will become anaerobic, leading to the buildup of toxic gases like hydrogen sulfide and methane, as well as incomplete breakdown of sewage.</p>
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How is a sufficient supply of oxygen ensured in an aerobic sewage treatment plant?

<p>A sufficient supply of oxygen is ensured in an aerobic sewage treatment plant through the use of aeration systems, which introduce air or pure oxygen into the treatment tanks. Common aeration methods include surface aerators, diffused air systems, and pure oxygen injection.</p>
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Define (i) Wet Bulb Temperature and (ii) Relative Humidity.

<p>(i) Wet Bulb Temperature is the temperature indicated by a thermometer with a wet bulb, which measures the cooling effect of evaporation on the bulb. It is lower than the dry bulb temperature.</p> <p>(ii) Relative Humidity is the amount of water vapor present in air expressed as a percentage of the amount needed for saturation at the same temperature.</p>
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State the countermeasures that need to be taken to reduce the risks of Legionella in an Air Conditioning system.

<p>Countermeasures to reduce Legionella risks in air conditioning systems include: maintaining water temperatures outside the bacteria growth range, using biocides, regularly cleaning and disinfecting the system, ensuring proper drainage to prevent stagnant water, and implementing a water management plan with testing and monitoring.</p>
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With the aid of a sketch, describe the construction of a spirally wound membrane suitable for use in a Reverse Osmosis water making plant, identifying all component parts.

<p>A spirally wound membrane consists of a permeate collection tube surrounded by membrane envelopes separated by permeate carriers and feed spacers. The membrane envelope is made of a semi-permeable membrane sheet sealed around a permeate carrier fabric. Feed water flows along the membrane surface, with purified water passing through the membrane into the permeate carrier and collection tube.</p>
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With the aid of a sketch, explain how a stabilizer fin produces a stabilizing effect as the vessel moves through the water.

<p>A stabilizer fin produces a stabilizing effect by generating a hydrodynamic lifting force that counteracts the rolling motion of the vessel. As the vessel rolls, the fin moves through the water at an angle of attack, creating lift in the opposite direction of the roll. This lift force acts to dampen the rolling motion and stabilize the vessel.</p>
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Flashcards

Purpose of Merchant Shipping Notices?

Provide important information and instructions regarding shipping regulations and safety.

Purpose of Marine Guidance Notes?

Provide guidance and recommendations on specific maritime procedures or practices.

Purpose of Marine Information Notes?

Disseminate general information and updates relevant to the maritime industry.

Engine operating parameters to record?

  1. Temperature 2. Pressure 3. Fuel consumption 4. Oil level
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Generator output parameters to record?

  1. Voltage 2. Current 3. Frequency
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Engine parameters increasing with alternator load?

  1. Temperature: Due to increased workload. 2. Fuel consumption: More power required. 3. Pressure: Higher demand on the engine.
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Purpose of a planned maintenance system?

To schedule and manage regular maintenance tasks to ensure the continued operation and reliability of equipment.

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Parameters for planned maintenance?

  1. Time intervals 2. Usage hours 3. Manufacturer recommendations
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How does a planned maintenance system influence classification society requirements?

Demonstrates proper maintenance, leading to favorable treatment in surveys and acceptance of machinery condition.

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Garbage categories in the garbage record book?

  1. Plastics, 2) Food wastes, 3) Domestic wastes, 4) Cooking oil, 5) Incinerator ashes, 6) Operational wastes, 7) Cargo residues, 8) Animal carcasses, 9) Fishing gear.
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Biological operating principle of an aerobic sewage treatment plant and the dangers if a supply of oxygen is not present.

Aerobic bacteria break down sewage. Lack of oxygen leads to anaerobic conditions and toxic gas buildup.

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How to ensure sufficient oxygen in an aerobic sewage treatment plant?

Through aeration systems which introduce air or pure oxygen, like surface aerators and diffused air systems.

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Wet Bulb Temperature and Relative Humidity?

(i) Temperature measured with a wet bulb, showing cooling effect of evaporation. (ii) Water vapor in air as a percentage of saturation.

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Countermeasures to reduce Legionella risks in an Air Conditioning system?

Maintain water temperatures outside bacteria growth range, use biocides, regular cleaning, prevent stagnant water, water management plan.

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Spirally wound membrane construction?

Permeate collection tube surrounded by membrane envelopes, permeate carriers, and feed spacers. Feed water flows along the membrane surface.

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Stabilizer fin's stabilizing effect?

Fin generates a hydrodynamic lifting force opposing the rolling motion as the vessel moves through water.

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