Small Vessel Second Engineer Certification Exam: Auxiliary Equipment Part I
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Questions and Answers

State FIVE indications that a fault has occurred in a centrifugal pump/motor set.

  1. Abnormal noise 2. Vibration 3. High temperature 4. Leakage 5. Low pressure

State a possible cause of each of the faults mentioned in the previous question.

  1. Misalignment 2. Imbalance 3. Overloading 4. Seal failure 5. Blockage

Explain how a relief valve suitable for use on the air side of a compressor is reset after overhaul.

The relief valve is reset by adjusting the spring tension to the specified pressure according to manufacturer's instructions.

Describe a pressure reducing valve suitable for supplying control air from the main starting air supply.

<p>A pressure reducing valve reduces the high pressure from the main starting air supply to a lower controlled pressure suitable for control air usage.</p> Signup and view all the answers

Describe THREE types of wastage that may occur on the internal surfaces of a ship's side valve made of modular cast iron.

<ol> <li>Corrosion 2. Erosion 3. Cavitation</li> </ol> Signup and view all the answers

Sketch a relief valve suitable for use on the air side of a compressor.

<p>Sketch of a relief valve suitable for use on the air side of a compressor.</p> Signup and view all the answers

Sketch a pressure reducing valve suitable for supplying control air from the main starting air supply.

<p>Sketch of a pressure reducing valve suitable for supplying control air from the main starting air supply.</p> Signup and view all the answers

Where should refrigerant gas bottles be stored?

<p>In a well-ventilated area away from direct sunlight and sources of heat.</p> Signup and view all the answers

What is the weakest part of a storage bottle for refrigerant?

<p>The valve.</p> Signup and view all the answers

How can it be determined if refrigerant has been leaking from gas bottles?

<p>By checking for hissing sounds or using a leak detection solution.</p> Signup and view all the answers

State the TWO methods of recharging a refrigeration system and where the connection to the system should be made for EACH method.

<ol> <li>Liquid Charging - Connect to the low-pressure side. 2. Vapor Charging - Connect to the high-pressure side.</li> </ol> Signup and view all the answers

How should excessive refrigerant be removed from the system without infringing MARPOL regulations?

<p>By using a refrigerant recovery unit to capture and safely dispose of the excess refrigerant.</p> Signup and view all the answers

Explain the meaning of '100% redundancy' in steering gears.

<p>Having a complete backup system that can fully take over in case of failure.</p> Signup and view all the answers

What is 'single failure criteria' in steering gears?

<p>The requirement that the system continues to operate even if a single component fails.</p> Signup and view all the answers

Describe a pilgrim nut and its usage in ensuring correct fitting of a keyless propeller.

<p>A pilgrim nut is a threaded component that moves along a shaft to adjust propeller pitch. It ensures the propeller is securely attached without a key.</p> Signup and view all the answers

Describe the construction of a salient pole a.c. generator rotor.

<p>The rotor has projecting poles with field windings wrapped around them. These poles create the magnetic field necessary for power generation.</p> Signup and view all the answers

How many poles would be required for a 50Hz supply and a rotational speed of 750rpm in an a.c. generator?

<p>Four poles are required for a 50Hz supply at 750rpm.</p> Signup and view all the answers

What are the requirements for an internal light fitting in battery lockers?

<p>The light fitting should be explosion-proof, securely fixed, and battery-powered.</p> Signup and view all the answers

Why are the requirements for an internal light fitting in battery lockers necessary?

<p>These requirements prevent the risk of explosion due to sparks from electrical components.</p> Signup and view all the answers

Study Notes

Small Vessel Second Engineer 060-03 - Auxiliary Equipment Part I

  • The examination is administered by the Scottish Qualifications Authority on behalf of the Maritime and Coastguard Agency.
  • The examination is 2 hours long, from 1400-1600 hrs.
  • Non-programmable calculators are permitted, and all formulae used must be stated with clear working and intermediate steps.

Auxiliary Equipment

  • Types of wastage that can occur on the internal surfaces of a ship's side valve made of modular cast iron:
    • Three types of wastage
  • Centrifugal Pump/Motor Set:
    • Five indications of a fault:
    • Possible cause of each fault
  • Relief Valve:
    • Sketch of a relief valve suitable for use on the air side of a compressor
    • Explanation of how the valve is reset after overhaul
  • Pressure Reducing Valve:
    • Description with a sketch of a pressure reducing valve suitable for supplying control air from the main starting air supply

Refrigeration System

  • Safe storage and handling of refrigerant:
    • Storage location of refrigerant gas bottles
    • Weakest part of the storage bottle
    • How to determine if refrigerant has been leaking from gas bottles
    • Two methods of recharging a refrigeration system, including connection points
    • How to remove excessive refrigerant from the system without infringing MARPOL regulations

Steering Gears

  • Definition of:
    • 100% redundancy
    • Single failure criteria

Propeller and Thrust Bearing

  • Description with a sketch of a pilgrim nut
  • Explanation of how the pilgrim nut is used to ensure correct fitting of a keyless propeller
  • Inspection of a main thrust bearing

Salient Pole A.C. Generator Rotor

  • Description of the construction of a salient pole a.c. generator rotor
  • Calculation of the number of poles required for a 50Hz supply, rotational speed of 750rpm

Battery Lockers

  • Requirements for an internal light fitting
  • Explanation of why the requirements are necessary

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Prepare for the Small Vessel Second Engineer certification exam for Auxiliary Equipment Part I administered by the Scottish Qualifications Authority on behalf of the Maritime and Coastguard Agency. The exam date is Friday, 02 February 2018, from 1400-1600 hrs. Candidates are allowed to use non-programmable calculators, with clear presentation of formulae and working methods.

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