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24 Cards in this Set

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If a conflict arises between the documents containing the maintenance procedures for diving equipment and systems I.E. military and manufacturer’s operating and maintenance (O&M) manuals and Planned Maintenance System (PMS) Maintenance Requirement Cards (MRC), which takes precedence?
Planned Maintenance System (PMS) Maintenance Requirement Cards (MRC)
If a conflict arises between the documents containing the maintenance procedures for diving equipment and systems I.E. military and manufacturer’s operating and maintenance (O&M) manuals and Planned Maintenance System (PMS) Maintenance Requirement Cards (MRC) which takes precedence?
Planned Maintenance System (PMS) Maintenance Requirement Cards (MRC)
What if the PMS/MRC is inadequate or incorrect and what takes precedence?
The applicable military O&M manual takes precedence. Report inadequate or incorrect PMS via a PMS feedback report in accordance with current PMS instructions.
What if the PMS/MRC and applicable military O&M manual are inadequate or incorrect and what takes precedence?
The manufacturer’s technical manual takes precedence. Report inadequate or incorrect military technical manual information in accordance with procedures in the affected technical manual.
Who must be notified prior to disregarding any required maintenance procedures on certified diving equipment?
NAVSEA or NAVFAC. Failure to do so may compromise certification
What resources do you have to know whether you are allowed to utilize a piece of diving equipment?
The Authorized for Navy Use (ANU) list or be an element of a certified diving system
Who is the System Certification Authority (SCA) for all afloat and portable diving and hyperbaric systems?
Naval Sea Systems Command Code 00C4
Who is the System Certification Authority (SCA) for all shore-based diving and hyperbaric systems?
Naval Facilities Engineering Command Code OFP-SCA
Who approves operating procedures (OPs) and Emergency Operating Procedures (EPs) for all diving and recompression chamber systems?
NAVSEA or NAVFAC and requires the Commanding Officer’s or OIC’s signature on the cover page as final review.
Who has approval authority to make changes to diving systems OP’s or EP’s?
NAVSEA or NAVFAC
What are the Military Diver’s Breathing Air Standards for diver’s air compressed from ANU or certified diving system?
Constituent Specification
Oxygen (percent by volume) 20–22%
Carbon dioxide (by volume) 1,000 ppm (max)
Carbon monoxide (by volume) 20 ppm (max)
Total hydrocarbons (as CH4 by volume) 25 ppm (max)
Odor and taste Not objectionable
Oil, mist, particulates 5 mg/m3 (max)
May Navy diver’s breathing air may be procured from commercial sources?
Yes
What are the stipulations when procuring diver’s breathing air from commercial sources?
It shall be certified in writing by the vendor as meeting the purity standards of FED SPEC BB-A-1034 Grade A Source I (pressurized container) or Source II (compressor) air. It may also be qualified for use by utilizing an ANU portable air monitor except when diving in cold water at or below 37 deg F since the portable air monitor does not measure water vapor.
Each diver breathing-air source in service must be sampled how often for purity and contaminates?
Approximately every 6 months (within the interval between 4 and 8 months following the last accomplishment), when contamination is suspected and after system overhaul.
How long shall the air sample analysis report be maintained on file for each air compressor (by compressor serial number) used to produce diver’s breathing air?
The most recent
When sampling from HP and LP charging systems, separate samples should be taken from each compressor supplying the system. Samples from the compressors should be taken where?
As close to the compressor as possible but down stream of the last compressor-mounted air treatment device (moisture separator, filter, etc.).
Air samples shall be taken and returned to NSWC-PC within ____ working days of receipt of the air sample kit to preclude incurring late fees.
5
Can commands utilize local air sampling services vice NSWC-PC?
Yes. Commands may use local government (e.g., shipyards, ship repair facilities, government research laboratories) or commercial laboratories to analyze diver’s air samples. Commands are required to bear the cost of locally procured air sample services. Local sampling facilities must be able to analyze to U.S. Navy air purity standards.
What types of malfunctions or operator errors may cause contamination risk to the diver’s air supply when using oil-lubricated compressor?
a. Excess oil mist being passed out of the compressor due to excess clearances
b. Broken parts
c. Overfilling the oil sump
d. Overheating to the point of causing combustion of the lubricating oil and/or gaskets and other soft goods found in the compressor
What is the approved lubricant used in diver’s air compressors for normal operations?
MIL-PRF-17331 (2190 TEP)
What is the approved lubricant used in diver’s air compressors for cold weather operations?
MIL-PRF-17672 (2135TH)
Can you use synthetic based oil in diver’s air compressors?
Yes. When the compressor manufacturer specifically recommends the use of synthetic based oil in their compressor for production of breathing air, that manufacturer recommended synthetic base oil may be used in lieu of MIL-PRF-17331 or MIL-PRF-17672 oil.
What are the guidelines for selecting diving system gauges in regards to their range?
Select a gauge whose full scale reading approximates 130 percent to 160 percent of the maximum operating pressure of the system. Following this guideline, a gauge with a full scale reading of 4,000 or 5,000 psi would be satisfactory for installation in a system with a maximum operating pressure of 3,000 psi.
What protects the operator in the event of Bourdon tube failure due to overpressurization which could otherwise result in explosion of the gauge lens in many gauges?
A case blowout plug on the rear surface. The plug must not be obstructed by brackets or other hardware.