Engineering Maintenance Procedures Quiz
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Questions and Answers

What is the standard grade of precision for bearings?

  • Super Precision
  • Grade 50
  • Grade 70
  • Grade 00 (correct)

    • What is the primary design principle of an SSS clutch?

  • Regular maintenance required
  • Frequent service intervals need to be scheduled
  • Fit and forget, minimal intervention needed (correct)
  • Requires spare parts for longevity

    • How are multi-disc hydraulic clutches typically compressed?

  • Controlled oil pressure (correct)
  • Air pressure
  • Mechanical levers
  • Spring tension

    • Which form is typically used for Simplified Acquisition Procedures (SAP)?

    <p>SF1449 (Solicitation/Contract/Order for Commercial Items) (A), OF347 (Order for Supplies or Services) (B)</p> Signup and view all the answers

    What type of pressure is used on some pneumatic clutches like the ones on the 175 WLM Z-Drives?

    <p>Air pressure (C)</p> Signup and view all the answers

    Who has the ultimate authority to approve engineering change proposals for assets still in the acquisition phase?

    <p>The CG-932x Acquisition Program Manager (D)</p> Signup and view all the answers

    Where should sealing compound be applied to a 45 RBM steering linkage bolt?

    <p>The first three threads (B)</p> Signup and view all the answers

    Which method is most effective for maintaining fuel quality by removing free water?

    <p>Tank stripping (A)</p> Signup and view all the answers

    For maintenance beyond a unit's capability, which type of service request might be used?

    <p>SFLC Service Request, SFLC Industrial Service Order (ISO), or Shore Side Maintenance Request (SSMR) (B)</p> Signup and view all the answers

    How are maintenance items identified during a cutter inspection typically tracked?

    <p>Via the Asset Computerized Maintenance System (ACMS) (D)</p> Signup and view all the answers

    What is the purpose of testing service tanks for free water?

    <p>To identify the presence of water through bottom soundings (B)</p> Signup and view all the answers

    What is the maximum recommended Parts Per Million (PPM) of chloride in jacket water makeup?

    <p>40 PPM (C)</p> Signup and view all the answers

    If there are hazy conditions observed in a fuel sample, how can you identify if the issue is caused by air instead of water?

    <p>Allow it to sit and observe for separation (D)</p> Signup and view all the answers

    Besides the PMS schedule and within 24 hours of system changes when should jacket water samples be tested?

    <p>Monthly (B)</p> Signup and view all the answers

    How many waveforms represent three-phase power?

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

    Into how many sections, are the underway machinery logs typically broken down?

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

    For assets still in acquisition, who directs changes to engineering and logistics documents if a contractor is responsible for their development and updates?

    <p>The contracting officer, as directed by the program management office (B)</p> Signup and view all the answers

    What is the phase difference between each voltage in a three-phase AC generator?

    <p>120 degrees (D)</p> Signup and view all the answers

    What instrument is typically used to test a pressure sensor?

    <p>A digital multimeter (B)</p> Signup and view all the answers

    What type of agreement is best suited for frequently purchasing from the same vendor?

    <p>Blanket Purchase Agreement (C)</p> Signup and view all the answers

    What is the specific term for the link between main journals and connecting rod journals on a crankshaft?

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

    Which part of the crankshaft serves as the main support and center of rotation?

    <p>Main journals (C)</p> Signup and view all the answers

    Besides reducing weight, what is another benefit of hollow construction in crankshaft journals?

    <p>Provides a passage for lubricating oil (A)</p> Signup and view all the answers

    What is the function of the crankshaft webs?

    <p>They form the link between the main journals and the connecting rod journals (C)</p> Signup and view all the answers

    Which of the following modifications would necessitate an Electromagnetic Compatibility (EMC) or TEMPEST inspection?

    <p>Implementing a new radar system with higher power output. (A)</p> Signup and view all the answers

    What does a fuel sample clearing from the bottom to the top after resting for 5 minutes indicate?

    <p>The cloudiness is due to dissolved air, making the fuel acceptable. (D)</p> Signup and view all the answers

    What is the primary characteristic of a dry-type air filter used in oil-free compressors?

    <p>It uses felt or other media in rectangular or radial fin forms. (B)</p> Signup and view all the answers

    Which regulator on an SCBA reduces the pressure to approximately 80 psi?

    <p>The first stage regulator (C)</p> Signup and view all the answers

    According to the provided guidelines, what is the required test pressure for a temporary hose?

    <p>150% of the rated working pressure. (C)</p> Signup and view all the answers

    What does the term VI stand for in the context of hydraulics?

    <p>Viscosity Index (D)</p> Signup and view all the answers

    If a driven gear has 40 teeth and the driving gear has 10 teeth, what is the reduction ratio?

    <p>4 (D)</p> Signup and view all the answers

    Which gear types are commonly found in hydraulic gear pumps?

    <p>Spur and Helical (C)</p> Signup and view all the answers

    Which of these actions would NOT require a review from the perspective of system changes?

    <p>Replacing an existing navigational computer with the exact same model. (C)</p> Signup and view all the answers

    Who must approve the use of biocide fuels on Coast Guard cutters and boats?

    <p>The Product Line and the Main Propulsion Machinery Section - Fuel Quality at SFLC ESD. (D)</p> Signup and view all the answers

    What is the main purpose of the oil in a viscous impingement type air filter?

    <p>To trap dust particles from the incoming air. (D)</p> Signup and view all the answers

    What is the maximum allowable biodiesel content in fuel used by Coast Guard cutters and boats without specific authorization?

    <p>B0.5 (B)</p> Signup and view all the answers

    When testing a high pressure hose in low pressure system, what should the test pressure be if the system design pressure is 100 psi?

    <p>150 psi (A)</p> Signup and view all the answers

    What is the pressure maintained by the second stage regulator in an SCBA facepiece?

    <p>A positive pressure of 0.05 psig (D)</p> Signup and view all the answers

    What type of air filter uses a reservoir of oil that is agitated by incoming air?

    <p>Oil-Bath Filters (D)</p> Signup and view all the answers

    If a fuel treatment, other than a biocide, is going to be used, who must provide direction or approval?

    <p>The Product Line or the Main Propulsion Machinery Section - Fuel Quality at SFLC ESD (D)</p> Signup and view all the answers

    During the second phase of engine break-in, what is the primary factor contributing to the successful seating of new piston rings?

    <p>Increased cylinder pressures and temperatures. (D)</p> Signup and view all the answers

    Which of the following safety programs is applicable to both ASHORE and AFLOAT environments?

    <p>Hearing Conservation Program (A)</p> Signup and view all the answers

    What does a yellow LED remaining lit on an SCBA after startup indicate?

    <p>A low battery condition exists. (D)</p> Signup and view all the answers

    What is the recommended spark plug electrode gap for a P6 engine?

    <p>0.028 - 0.031 inches (C)</p> Signup and view all the answers

    What type of engine is a P100 Yanmar engine?

    <p>Air-cooled, single cylinder, 4-cycle diesel engine (B)</p> Signup and view all the answers

    The Honda Heated Oxygen Sensor (HO2S) detects air-fuel ratio by measuring which two parameters?

    <p>Ambient air and heated oxygen (B)</p> Signup and view all the answers

    What is the primary mechanism that causes stress corrosion cracking?

    <p>Tensile stress in a corrosive environment. (A)</p> Signup and view all the answers

    On a generator, where is the current collected?

    <p>From the slip rings by conducting brushes (A)</p> Signup and view all the answers

    Flashcards

    Order forms for SAP

    Forms used for Simplified Acquisition Procedure include OF347 or SF1449.

    CG-932x PMO

    The CG-932x Acquisition Program Management Office evaluates and approves engineering change requests.

    CG-22 approval authority

    The CG-932x program manager has authority over CG-22 requests for acquisitions.

    Maintenance request types

    Three types of maintenance requests: SFLC Service Request, ISO, or SSMR.

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    Tracking maintenance items

    Maintenance items from cutter inspections are tracked via ACMS.

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    Max chloride in makeup water

    Jacket water should have max 40 ppm chloride to prevent scaling.

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    Frequency of J/W tests

    Test engine jacket water within 24 hours of filling and monthly thereafter.

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    Underway log sections

    Machinery logs for underway operations are divided into daily sections covering 0000 to 2400.

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    Grades of precision

    Three grades of precision: grade 00 standard, grade 50, and grade 70 super-precision.

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    SSS Clutch

    Designed for 'Fit and Forget', requiring no regular service or spare parts.

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    Multi-disk clutches (MDC)

    Engage/disengage power transmission using hydraulic or pneumatic pressure.

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    Sealing compound application

    Apply sealing compound to the first three threads of the bolt.

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    Tank stripping

    Periodic removal of water bottoms and contaminants to maintain fuel quality.

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    Free water detection

    Use bottom soundings and indicating paste to check for free water in tanks.

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    Hazy fuel sample

    Let a cloud sample sit to check if haziness is from water or air.

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    Eaton disc type pneumatic clutches

    Utilize air pressure to engage clutch plates, can operate dry or oil filled.

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    Three-phase power

    A power system with three overlapping AC cycles, 120° out of phase.

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    AC generator windings

    Three single-phase windings creating three separate circuits in a generator.

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    Crankshaft webs

    Parts connecting main journals to connecting rod journals, known as throws.

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    Main journals

    Support points and centers of rotation in a crankshaft, made surface-hardened.

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    Hollow crankshaft construction

    Reduction in weight with increased torque capability using hollow design.

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    Blanket Purchase Agreement (BPA)

    An agreement to fulfill repetitive needs under a schedule contract for supplies/services.

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    Pressure sensor testing

    Checked with a digital multimeter for known values at specific pressures.

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    AC fan coil unit function

    Modifies air temperature and quality in HVAC systems.

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    Running in under load

    The process of operating equipment under progressively higher loads to ensure proper seating of piston rings.

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    SCBA low battery light

    Indicates a low battery condition with a yellow LED after start-up.

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    P100 engine type

    An air-cooled, single cylinder, 4-cycle diesel engine rated at 10 horsepower.

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    Honda Air/Fuel sensor

    Heated oxygen sensor (HO2S) that detects the air-fuel ratio, mounted on exhaust manifolds.

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    Low oil alarm PSI

    Honda 225's oil pressure light activates when pressure drops below 23 psi at 1800 rpm.

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    Stress Corrosion Cracking

    Cracking that occurs under tensile stress in a corrosive environment.

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    Generator voltage collection

    Conducting brushes of carbon gather current from slip rings to transfer it to an external circuit.

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    Roller bearing tolerance standard

    Indicates precision tolerances outlined in standard 244-1.2.1.2.

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    Hull structure changes

    Modifications to the design or construction of a vessel's hull.

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    Electromagnetic Compatibility (EMC)

    The ability of equipment to operate without interference in its electromagnetic environment.

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    Fluid and coating system changes

    Modifications to approved systems for fluids or surface coatings on vessels.

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    Dry Type Filters

    Air filters using materials like felt to clean intake air in oil-free compressors.

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    Viscous Impingement Filters

    Filters using an oil-coated wire mesh to trap dust in a liquid form.

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    Testing pressure for hoses

    The requirement to test hoses at 150% of their rated working pressure for safety.

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    Reduction Ratio (RR)

    The ratio of teeth on a driven gear to the teeth on a driving gear, determining speed and torque conversion.

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    Gearbox Reduction Ratio

    The combined reduction ratio influenced by both high speed and low-speed gears in a gearbox configuration.

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    Cloudiness determination

    If a fuel sample clears from bottom to top, dissolved air is the cause, making it acceptable.

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    First stage regulator

    Reduces pressure to 80 psi, located on the carrier assembly.

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    Balance-type pressure reducer

    Maintains pressure to the second stage regulator at approximately 80 psig.

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    Pressure-demand regulator

    Maintains positive pressure in the facepiece at all times.

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    Viscosity Index (VI)

    Measures a fluid's resistance to viscosity changes with temperature; higher is better.

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    Types of gears in hydraulic pumps

    Spur and Helical gears are used in hydraulic gear pumps.

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    Biocide fuels approval

    Must be approved by the appropriate Product Line and Fuel Quality sections before use.

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    Biodiesel limits

    No fuel with biodiesel greater than B0.5 may be used without authorization.

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    Study Notes

    NOV20 MKC SWE

    • Simplified Acquisition Procedure (SAP) forms include Order for Supplies or Services (OF347) or Solicitation/Contract/Order for Commercial Items (SF1449).
    • CG-932x Acquisition Program Management Office (PMO) evaluates engineering change requests (ECRs) for Cutter acquisitions until the asset is transitioned to sustainment.
    • The PMO consults subject matter experts (SMEs) for asset-type-specific content.
    • CG-932x Acquisition Program Manager approves, modifies, downgrades, or rejects CG-22s for assets still in the acquisition phase.
    • Configuration/engineering change proposals for surface assets in acquisition are approved by each surface program's Configuration Control Board (CCB).
    • Types of requests for maintenance outside unit capability include Service Request, Industrial Service Order (ISO), or Shore Side Maintenance Request (SSMR).
    • Maintenance items derived from cutter inspections are tracked using ACMS.
    • Makeup water for jacket water should contain no more than 150 µmho/cm conductivity or 40 ppm chloride.
    • Nitrite levels below 1000 PPM may not provide adequate corrosion protection.
    • Engine jacket water samples are tested within 24 hours of fresh filling and treating, adding water to the system, and adding inhibitor.
    • Additional tests are performed at least monthly, and in accordance with the Planned Maintenance System.
    • Machinery Logs are recorded daily in 4-hour blocks at sea, and in 3 periods (0000-0900, 0900-1600, and 1600-2400) in port.
    • Engineers of the Watch (EOW) must sign these logs in either ink or digitally.
    • Machinery logs are kept for 3 years.
    • Loads moved during docking require documentation.
    • Glass Reinforced Plastic (GRP) shaft coverings are inspected every five years or during every scheduled drydocking, in accordance with MIL-STD 2199A.
    • Leakage rates for silicon carbide seals (8" or less) should not exceed 0.6 fluid ounces per inch of shaft diameter per hour. Stuffing box leakage is required for cooling and lubrication.
    • 45 RBM shaft seals require 3 grease shots to the grease fitting.
    • Jet-drive bearing housing oil sump contains approximately 0.48 gallons of DELVAC 1300 Super15W40. Wait 5 minutes before checking the oil level which must be between the minimum and maximum marks.
    • Ultrajet shafts require rotation during long periods of non-operation to lubricate bearings.
    • WMSL OWS feed pump is called the Feed Pump.
    • Honda 225 spark plugs use iridium coated center electrodes.
    • Removing top bolt of lower unit gear case oil allows for oil draining.
    • The COR must be notified of hazardous material use.
    • Hazardous waste must be managed as such, from the day of discovery and not the date of analysis. Consult an environmental specialist immediately.
    • Hazardous waste is considered so if listed in 40 CFR Subpart D Part 261 or if it has ignitability, reactivity, corrosivity or toxicity characteristics.
    • Underground storage tanks comprise those tanks and associated piping where 10% or more is beneath the ground.
    • A Fuel Purifier(FOP) separates contaminated fuel into heavy phase (water), light phase(purified fuel) and solids/sludge.

    Other

    • Chloride levels above 100 ppm indicate seawater contamination, impacting coolant corrosion effects and scale formation
    • Various maintenance procedures, including testing frequencies, are outlined for different systems, and components.
    • Detailed specifications for oil use are given, including types and quantities required for specific parts and tasks(e.g., 45 RBM gear case oil amount, LRI Jet drive bearing oil type).
    • Procedures for checking and maintaining piston ring seating in various engine types are described (e.g., visual inspection, operational parameters, and specific situations like when cylinders are glazed).
    • Methods for inspecting and maintaining components including crankshaft deflection, hot oil baths (temperature limits), R/O pump operation, and bromine cartridge durations are detailed.
    • Various procedures and specifications related to the use and maintenance of systems, including those for potable water hoses, splices for large conductors, or types of corrosion or pressure relief valves.
    • Information on hearing protection, various types of filtration, and vibration dampeners are provided
    • Different types of fuel systems (including biocide use and purity standards) are addressed.
    • Procedures for operating and maintaining various components, including fuel pumps, or various types of AC generators and their parts.
    • Procedures and standards for maintaining or testing systems are detailed extensively, such as requirements related to tank stripping or calibration procedures used for various instruments.
    • Various topics on systems management, safety, and quality assurance are described.

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    Nov 2020 MKC SWE PDF

    Description

    Test your knowledge on engineering maintenance procedures related to bearings, clutches, and fuel quality. This quiz covers various design principles, inspection methods, and maintenance requests relevant to engineering assets. Enhance your understanding of the protocols essential for effective equipment management.

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