DCASE - Unit 7 - Gas Free Engineering

  1. What is the purpose of the 6 gas analyzer?
    • Detect OET.
    • 1. Oxygen (19.5%<O2<22%)
    • 2. Explosives (<10% LEL)
    • 3. Toxins (Above NIOSH IDLH levels)
  2. How often must All Hands require Hazard Awareness training?
    Upon reporting and annually thereafter.
  3. What instruction or bill outlines the requirements to be met in the event of an emergency GFE evolution?
    Toxic Gas Bill
  4. What are two purposes of the Gas Free Program?
    • 1. To ensure a safe working and living environment for the crew
    • 2. To provide an all hands hazard awareness training program
  5. How often is the Gas Free Program evaluated and by whom?
    • 1. Annually
    • 2. Safety Officer
  6. What are the Recertification Procedures for all GF Personnel?
    • 1. Annual Verification of CPR
    • 2. Emergency Rescue Drill & Documented
    • 3. Engaged in GFE During the Year Issued 10 Certificates.
    •     a. If Above Has Not Been Satisfied, Complete 5 Gas Free Evolutions Under Supervision of a Certified GFE.
    •     b. If Above Is Not Possible, Complete an Oral/Written Exam & a Practical Exercise.
  7. When may the 40 hour OJT requirement for the GFE be waived?
    • 1. Graduated Formal School Within 36 months of reporting.
    • 2. Unit does not have a qualified GFE aboard.
    • 3. Service member is a USCG Engineering Petty Officer.
  8. Where are gas free certificates retained/posted?
    • 1. Original - Gas Free Log (Retain 1 year)
    • 2. OOD (QD or Bridge)
    • 3. All accesses to the space
    • 4. Division Requesting the Service
    • 5. DC Central
  9. What are the requirements for a space to be considered “Safe for Personnel/Safe for Hot Work”?
    • 1. 19.5% < O2 < 22 .0%
    • 2. Toxins less than PEL
    • 3. All Flammables removed (LEL = 0)
    • 4. All boundary spaces protected
  10. How long is a Gas Free Certificate good for? How many times can it be recertified?
    • 1. 8 hours
    • 2. Two times for 8 hours each
  11. When is the CO required to sign the Gas Free Certificate?
    • 1. Gas freeing IDLH space
    • 2. Gas freeing for civilian contractors
    • 3. Gas freeing for foreigner overseas
    • 4. Hot Work adjacent to Magazines (never above or within 5 feet)
  12. What are the requirements for a space to be considered "Not Safe for Personnel/Not Safe for Hot Work?"
    • 1. Oxygen deficient or rich
    • 2. IDLH Atmosphere
    • 3. Danger of Fire or Explosion in Presence of Hotwork
  13. What are the requirements for a space to be considered "Not Safe for Personnel W/O Protection/Not Safe for Hot Work?"
    • 1. Provides provisional entry into space.
    • 2. Toxics exceed PEL or Unity, but less than IDLH
    • 3. Explosives >0% and <10%
    • 4. Hot work prohibited or not requested

    Note: Hot work is prohibited in the space or in the boundary spaces for which a provisional certificate is issued.
  14. What are the requirements for a space to be considered "Safe for Personnel/Not Safe for Hotwork?"
    • 1. Toxics below PEL
    • 2. Sufficient oxygen
    • 3. Danger of explosion or excessive toxicants in presence of hot work or hot work not requested
  15. What are the requirements for a space to be considered "Not Safe for Personnel Inside/Safe for Hotwork Outside" and when would it be used?
    • 1. Pressed up or Inerted
    • 2. This is an emergency procedure and not one used routinely
  16. When can you Gas Free for a Civilian?
    • 1. Extreme emergency (failure to perform GFE services would increase liability).
    • 2. CO permission is required.
  17. When may a civilian gas free for you?
    • 1. For QA (CO retains right to have S/F conduct gas free regardless).
    • 2. When in a private shipyard (IAW MOA).
  18. When may you gas free for a foreign contractor?
    • 1. Outside US Waters.
    • 2. No Shore Maritime GFE available.
    • 3. No local Competent Person available.
  19. What is the Procedure for Military & Civilian Dual Occupancy in a space?
    • 1. Both GFE and Contractor will independently gas free the space
    • 2. GFE will inform contractor of his findings
    • 3. GFE will inform contractor that he retains legal obligation for the safety of contractor personnel in the space
  20. When may afloat GFE provide service to non-ship’s force uniformed personnel In-port?
    • 1. To conduct Assessments
    • 2. To conduct Inspections
    • 3. To develop Repair Work Packages
  21. What are the classes of respiratory protection equipment?
    • 1. Air Purifying
    • 2. Supplied Air
  22. What NSTM covers PPE?
    NSTM 077
  23. What publication would you find information on color coding for air purifying respirator cartridges?
    NAVOSH Manual (5100.19E)
  24. When may air be blown into a space vs. drawn out of a space?
    • 1. No flammables present or being generated
    • 2. No toxics present or being generated
    • 3. Only to provide clean air for breathing and comfort
  25. In the dilution formula, how many complete air changes are required and what is the timeframe?
    One complete air change in three minutes.
  26. What is "short circuiting" as it pertains to ventilation and how do you fix it?
    • 1. Source of Make-Up air is too close to exhaust inlet ducting.
    • 2. Place the trunk further into the space.
  27. Which Class of Hot Work ALWAYS requires a Fire Watch?
    Class I: High Energy Sparks
  28. Flammables Must be Moved How Far From Work Site?
    35 ft
  29. Surface Coatings Should be Cleared Away How Many Inches?
    4 inches
  30. What is the 5 Ft Rule About?
    Maintain 5 Ft Boundary Away from Magazine Bulkheads
  31. What are some general safety precautions required to be followed for tank cleaning?
    • 1. Smoking lamp out
    • 2. 200’ exclusion zone
    • 3. PPE
    • 4. Safety observer
    • 5. Non-spark producing tools
    • 6. Continuous ventilation
    • 7. SAR
  32. What is the preferred medium for inerting?
    Dry Nitrogen
  33. What are the different methods of tank cleaning?
    • 1. Hot or Cold Water Wash
    • 2. Steam Cleaning
    • 3. Butterworthing / Wheelerizing
    • 4. Chemical Cleaning
    • 5. Biological Cleaning
  34. Who must be contacted prior to spray painting interior to the ship?
    The GFE
  35. What are the GFE requirements after spray painting is complete?
    • 1. Continue to ventilate until space is clear.
    • 2. Secure ventilation then let the air settle for 10 minutes.
    • 3. Test the atmosphere (re-ventilate as needed).
  36. What is the publication in which CHT Tank Entry Procedures are prescribed?
    NSTM 593 - Pollution Control
  37. When are you allowed to perform CHT Tank Entry Procedures?
    • 1. In an Emergency.
    • 2. CO permission.
  38. When May Rescuers Enter a Confined Space?
    When the GFE/GFEA orders entry.
  39. Who is on the Primary Rescue Team during an Emergency Rescue in a Toxic Gas situation?
    • 1. One Investigator
    • 2. One Rescuer
  40. During Personnel Casualty Transport, what is the priority of triage?
    • 1. CAB'S (Circulatory, Airway, Breathing)
    • 2. Control Bleeding
    • 3. Treat for Shock
    • 4. Treat Broken Bones
    • 5. Transport to Medical
  41. Where are copies of Gas Free Certificates kept?
    • 1. All accesses to the space.
    • 2. GFE Files (Original copy).
    • 3. Division Requesting Services.
    • 4. OOD (Quarterdeck or Bridge).
    • 5. DC Central.

    Note: Original must be kept for 1 year.
  42. What are the requirements to be the Gas Free Engineer?
    • 1. 1 per Ship
    • 2. E-7 or Above
    • 3. CO’s Designation Letter
    • 4. Annual CPR Verification
    • 5. Formal School
    • 6. 40 Hours Practical Work U/I (waiverable)
  43. What are the requirements to be the Gas Free Engineer Assistant?
    • 1. 1 per Ship
    • 2. E-6 or Above
    • 3. CO’s Designation Letter
    • 4. Annual CPR Verification
    • 5. Formal School
  44. What are the requirements to be a Gas Free Engineer Petty Officer?
    • 1. 1 per IET (minimum)
    • 2. E-4 or above
    • 3. CO’s Designation Letter
    • 4. Annual CPR Verification
    • 5. Formal School
    • 6. PQS (NAVEDTRA 43704, 316)
  45. What is Ignition Temperature?
    Minimum temperature at which self sustained combustion occurs without an external ignition source.
  46. What is Fire Point?
    Temperature at which sufficient vapors are released to support continuous combustion once ignited.
  47. What is Flash Point?
    Minimum temperature at which sufficient vapors are released to form an ignitable mixture.
  48. What are the rules regarding hot work in vicinity of ammunition?
    • 1. Remove any/all ammunition prior to Availability or Overhaul.
    • 2. No hot work in any space containing ammunition.
    • 3. CO must approve in writing any hot work in adjacent spaces.
    • 4. Apply 5 foot rule for adjacent spaces.
  49. Describe Additive Effects.
    If there is more than one toxicant product in a space undergoing testing, the cumulative effects of the two or more products may be above unity, even though the PELs for any one of the products has not been exceeded.
  50. What is NSTM 593?
    Pollution Control (Sec 4, Sewage)
  51. What is NSTM 631?
    Preservation of Ships in Service (Sec 2. Safety Information)
  52. What is the NAVSEA OP 4?
    Ammunition Afloat (Ch 2, General Regulations)
  53. What is the risk of an oxygen rich atmosphere and at what percentage does this occur?
    • 1. Considered IDLH due to exceptional risk of fire.
    • 2. Greater than 22%
  54. What is the risk of an oxygen deficient atmosphere and at what percentage does this occur?
    • 1. Considered IDLH by OSHA due to lack of coordination, perception, and judgement.
    • 2. Less than 19.5%.
  55. What is the purpose of NIOSH?
    National Institute for Safety and Health tests and approves respiratory equipment and recommends toxicity exposure limits to OSHA.
  56. What is/are the respiratory protection requirements in an IDLH space?
    Supplied Air Respirator (SAR) w/15 min backup air (SCBA).
  57. What is/are the respiratory protection requirements when toxins are above PEL?
    Respiratory protection is mandatory (filter type respirator or supplied air respirator as appropriate).
  58. What is/are the respiratory protection requirements when toxins are below PEL?
    Respiratory protection is optional.
  59. What are the different tank cleaning methods?
    • 1. Chemical
    • 2. Butterworthing
    • 3. Steam
    • 4. Water Wash
    • 5. Biological
  60. How is steam cleaning of a tank accomplished?
    • 1. Temperature may not exceed 230 deg F.
    • 2. Apply 50 or 150 PSI steam for a period of 24 hours through a tank top connection.
    • 3. Used to steam out MOGAS tanks.
    • 4. May NOT be used in plastic or epoxy coated tanks (e.g. JP-5).
  61. What is inerting?
    • 1. Use CO2 (heavier than air) or N2 (lighter than air and preferred medium) to maintain <1% O2 concentration.
    • 2. Work outside of the space shall be certified and maintained as "Safe for Hot Work"
    • 3. Upon completion of work, dispose of displaced vapor and inerting medium safely.
  62. What emergency rescue equipment are you required to have?
    • 1. 5 SCBA's: 2 PASP's, 5 RASP's with 55 min of air per PASP (1 bottle).
    • 2. 4 safety harnesses and safety lines
    • 3. 2 radios or 3 SP Phones with salt and pepper lines on scene.
    • 4. First aid kit and stretcher
    • 5. Chain fall
    • 6. Detection equipment
    • 7. Explosion proof lighting, flashlight, drop lights, or chem lights.
    • 8. Additional PPE as required.
  63. What are the advantages of the PASP/RASP over an SCBA?
    • 1. Longer stay time
    • 2. 15 minute Back-up air supply
    • 3. Ease in Rescue
    • 4. Ease in Egress
  64. What is the composition of the Primary Rescue Team?
    • 1. One Investigator
    • 2. One Rescuer

    Conducts initial contact, assessment, & safe removal.

    Investigator has the comms.
  65. What is the composition of the Secondary Rescue Team?
    • 1. GFE determines the number
    • 2. 2+1 minimum size
    • 3. Don respiratory equipment and stand by to provide assistance to the Primary Rescue Team.
  66. How many Rescue Team Attendants are required and what is their purpose?
    • 1. One per rescuer.
    • 2. Helps to don gear.
    • 3. Tends safety line and chain fall.
    • 4. Tends SAR/SCBA air hoses.
    • 5. Maintains comms with the space.
  67. What are the operating steps for the Draeger tube?
    • 1. Insert unbroken tube.
    • 2. Squeeze bellows.
    • 3. Wait 30 minutes.
    • 4. Chain should still have slack.
    • 5. Read instruction sheet.
    • 6. Break off both ends of the tube.
    • 7. Insert tube with the arrow pointing to the pump.
    • 8. Squeeze bellows required number of times (Indicated by N= on the tube).
    • 9. Determine readings.
  68. When is the CO required to sign off on a Gas Free evolution?
    • 1. Gas freeing an IDLH space.
    • 2. Gas freeing for civilian contractors.
    • 3. Gas freeing for a foreigner overseas.
    • 4. Hot work in vicinity (5 ft) of a magazine.
  69. Why do we have ventilation requirements and how are they accomplished?
    • 1. Required to control the flammability and toxicity hazard.
    • 2. Use dilution-type ventilation to protect adjacent areas. This ensures vapor concentrations remain below 10% LEL.
    • 3. Run ventilation continuously.
  70. What is the purpose of general ventilation?
    • 1. Provides uncontaminated air for breathing or general comfort.
    • 2. Can be supply or exhaust.
    • 3. Rated for one complete air change every three minutes.
  71. What is the purpose of local exhaust ventilation?
    • 1. Captures contaminants as they are generated.
    • 2. Draws them through exhaust ductwork located 6-10 inches from the work being conducted.
    • 3. Effective for welding and solvent use.
    • 4. Exhaust only.
    • 5. The work zone farthest from the exhaust inlet requires airflow of 100 fpm towards the exhaust.
  72. What does the dilution ventilation formula calculate?
    • 1. One complete air change in three minutes.
    • 2. If welding, compare the results to NSTM 074 Vol 3 (pg. 74-78) and use the larger number for ventilation requirements.
  73. Name three toxicants that are associated with sewage.
    • 1. H2S
    • 2. Ammonia
    • 3. Methane
  74. What toxicant is associated with rust?
    Hydrogen
  75. Name two toxicants that represent an asphyxiation hazard.
    • 1. Nitrogen dioxide
    • 2. Ammonia
  76. What toxicants are associated with combustion?
    • 1. CO
    • 2. CO2
  77. When is Oxygen considered IDLH?
    • 1. Above 22%
    • 2. Below 19.5%
  78. When are explosives considered IDLH?
    When concentration exceeds 10% LEL
  79. Name four toxicants that are heavier than air.
    • 1. CO2
    • 2. H2S
    • 3. HALON
    • 4. Freon
  80. Name four toxicants that are lighter than air.
    • 1. CO
    • 2. Ammonia
    • 3. Hydrogen
    • 4. Methane
  81. What type of information is on an MSDS?
    • 1. General Info
    • 2. Physical/Chem. Characteristics
    • 3. Fire/Explosion Data
    • 4. Reactivity Data
    • 5. Health Hazards
    • 6. Precautions for Safe Handling and Control Measures
  82. What are the three tests required for calibrating the 6-gas analyzer?
    • 1. Fresh Air test (Done prior to each use)
    • 2. Bump test (daily before use)
    • 3. Monthly calibration
  83. What toxins are required to be tested for following a class "B" fire? Where can this be found?
    • 1. Carbon Dioxide
    • 2. Carbon Monoxide
    • 3. Hydrogen Chloride
    • 4. Hydrogen Cyanide
    • 5. Hydrocarbons

    Per NSTM 555-7.10.3
  84. What are the key sections of the NSTM 074 to be familiar with and why?
    • 1. Section 20 = Navy Gas Free Certificates
    • 2. Section 21 = Ventilation
    • 3. Section 22 = Hot Work
    • 4. Appendix C = Sample Gas Free Engineering Notebook
    • 5. Appendix D = Navy Gas Free Certification and Test Log
    • 6. Appendix E = Shipboard Hazardous Atmospheres and Compartments Identification Tables
    • 7. Appendix G = Chemical Names, PEL and IDLH
  85. Where can respirator cartridge colors identifiers be found?
    • 1. Manufacturer's Chart    
    • 2. NAVOSH Manual
    • 3. Industrial Hygienists' Field Operators Manual (IHFOM)
  86. What are the audit requirements and procedures for the GF program?
    • 1. Ship's Safety Officer shall audit annually.
    • 2. Audit follows NAVSEA checklist found on the NAVSEA DC page.
    • 3. Evaluates the GFE Service Personnel and recertification requirements.
    • 4. Document Crew Training upon reporting and annually.
    • 5. GFE personnel shall have letters of designation and qualifications shall be recorded in individual's service record.
  87. What is the definition of hot work?
    • 1. Flame heating, welding, torch cutting, brazing, or carbon arc gouging.
    • 2. Any operation producing temperatures of 240 deg C/400 deg F.
    • 3. Any operation occurring in the presence of flammables which require the use of the presence of an ignition source.
  88. What is the difference between Class I and Class II flames in vicinity of Alpha materials?
    • 1. Class I - High energy, scattered sparks.
    • 2. Class II - Minimal energy, localized sparks.
  89. What are the gas free requirements when conducting sewage cleanup?
    • 1. Gas free every two hours.
    • 2. Gas free every hour if temperatures are above 90 deg F.
  90. What are the nine phases to HAZMAT Spill Clean-Up Procedures per OPNAVINST 5100.19?
    • 1. Discovery and Notification
    • 2. Initiation of Action
    • 3. Evaluation
    • 4. Containment & Damage Control
    • 5. Dispersion of Gases/Vapors
    • 6. Cleanup & Decontamination
    • 7. Disposal of Contaminated Materials
    • 8. Certification for Re-Entry
    • 9. Follow-Up Reports
  91. What color indicates a Battle Dressing Station (BDS) on your DC plates?
    Green
  92. How do you transport casualties while in a stretcher?
    • 1. Feet first
    • 2. Head first only when transporting up or down ladders.
  93. Where can you find the specific requirements for Battle Dressing Stations?
    CNSP/CNSL INST 6000, Appendix K
  94. What are the four stretcher types?
    • 1. Stokes Stretcher
    • 2. Miller Board (Litter Splint)
    • 3. Army Litter
    • 4. Reeves Sleeve 2
  95. What is the purpose of the Gas Free Program?
    • 1. Provide a safe working and living environment for the crew.
    • 2. Provide Hazard Awareness Training of a general nature for the crew.
  96. When can you blow air into a space?
    • 1. No flammables present or being generated.
    • 2. No toxics present or being generated.
    • 3. Only to provide clean air for breathing and comfort.
  97. When conducting a bump test with the 6-gas analyzer, what is the delta (in percentage) that is acceptable?
    90-110% of cylinder value
  98. How many hoses/ducts can be used with a Ramfan 2000?
    3, 15', ducts per fan.
  99. What ways do toxicants enter the body?
    • 1. Ingestion (eating, drinking)
    • 2. Absorption (touching)
    • 3. Inhalation (breathing)
  100. What tools are available prior to opening a compartment to determine potential hazards?
    • 1. Previous chits.
    • 2. Tag Out Audit.
    • 3. DC Book.
    • 4. WAF log.
  101. When is a retest of a Gas Free Chit required?
    • 1. Entry or Work Delay
    • 2. Expiration (8 hours)
    • 3. Hazard Detected
    • 4. Ship Movement
    • 5. Securing Ventilation
    • 6. New Operations or Materials
    • 7. Closing Space or Temporary Shutdown
  102. On a gas free chit, what are the three ventilation options?
    • 1. Local exhaust Ventilation
    •      a. Welding, Painting, Using Solvents
    • 2. Dilution Ventilation
    •      a. Reducing toxins, Controlling flammable vapors
    • 3. General Exhaust Ventilation
    •      b. Providing cool comfort air in a hazard-free environment
  103. In a tank cleaning evolution, what is the difference between an IDLH and non-IDLH process?
    IDLH requires SAR/SCBA and CO permission prior to conducting work.
  104. What constitutes continuous atmospheric testing?
    Conducting a test every 15 minutes
  105. What constitutes a periodic atmospheric test?
    Any periodicity greater than 15 minutes.
  106. What is recirculation?
    When the exhaust of a space is located too close to the intake.
  107. What are the modes of operation for Gray and Black water holding tanks?
    • 1. Inport - All water and soil drains to tank, then to pier riser.
    • 2. Transit - Within 3 nm of coast. All black water diverts to tank, grey water to below W/L (to tank), grey water above W/L (overboard)
    • 3. At Sea - Beyond 3nm of coast. All grey and black water discharges overboard.
  108. When can the GFE/GFEA issue a certificate for initial work?
    • 1. Confine spaces that contain, or have not contained, toxic or flammable materials.
    • 2. Operations which generate or have the potential to generate toxic levels above PEL.
    • 3. Operations that do not result in IDLH flammable and O2 levels.
  109. When can the GFEPO issue a certification for initial work?
    • 1. Cold Work in spaces that do not contain, or have not contained, toxic or flammable materials.
    • 2. Operations which do not naturally generate toxic levels above PEL.
    • 3. Operations that do not result in IDLH flammable and O2 levels.
  110. When may the GFE/GFEA delegate initial test responsibilities?
    • 1. Written approval in CO designation letter
    • 2. Operations repetitive and routine
    • 3. No Space immediately designated as IDLH (sewage tanks, fuel tanks, etc.)
    • 4. Testing and Certification procedures clearly established in GFE instruction.
    • 5. GFEPO trained and qualified to perform delegated tasks.
  111. What are the ventilation requirements when welding and for what size rod?
    • 1. 2,000 cu ft per welder, if a 5/32 or 3/16 rod is used.
    • 2. 3,500 cu ft per welder, if a 1/4 rod is used.
    • 3. 4,500 cu ft per welder, if a 3/8 rod is used.
Author
RisingSunSailor
ID
334292
Card Set
DCASE - Unit 7 - Gas Free Engineering
Description
Study notes for DCASE Unit 7, Gas Free Engineering.
Updated