LOX Flashcards
LOX characteristics
- boils at -297F(183C)
- 1 cubic ft of lox expands to 860 cubic ft of gas at 70F(21C) sea level(860 times)
- 1.14 times heavier than water and weighs 9.527 lbs per gallon
- 25 liters of lox converts to 18,974 liters of gaseous O2
- pale blue liquid, exists in liquid state from temps -182.5 C- 297F
M13520.1C 5-5
LOX cart
- servicing cart 1200lbs, designed to store 50 gL of lox.
- space b/w the inner and outer shell on the cart is called the annular space
- 300 psi lox in system
- operates 270-455psi in static system/ 270-340psi under continuous breathing
- 6 supply regulators in flight station, 4 in cargo compartment
- service cart wheels to 12-15 psi
LOX USES
- @ 30,000ft and above 100% O2 will be delivered
- LOX qty(A) light comes on when supply drops below 5.0 L
- LOX qty LOW (C) light comes on when supply drops below 2.5 L
_____ shall be used specifically as a thread sealant
teflon tape
molybdenum disulfide shall be used on stainless steel flared fittings and on those applications where teflon tape cannot be used
When warmed to ambient temperature LOX expands to a gas ___ times its liquid volume
860:1
- What Is used to lubricate the parking brake on the LOX cart
- What do you lubricate the handbrake release handle and linkage with?
- mil-m-7866 graphite
- Lubricating oil mil-prf-6086 grade M
MPC 350020.0 p.19
In what manner shall the vent valve be when the cart is parked or being transported?
LOX carts shall be parked with the vent valve open and transported with the vent valve closed
TO 00-25-172 p. 4-14
What PPE is required for servicing LOX
Face shield, gloves(thermal insulated or leather welding), coveralls(cotton), apron(impermeable cotton duck, coated with rubber, boots
M13520.1C 5-6
LOX trailer inspect interval
Inspect, clean, grounding reel- 30 days reference AFTO 37C2-8-3-13, NAVAIR 19-25D-33, AFTO 37A19-3-2, AFTO 37C2-8-3-11
inspect, clean, lubricate- 90 day
inspect, clean, lubricate- 180 day
CGTO PG-85-00-310-A 5-3
How close should fire protection be when servicing
50 ft
MPC 350020.0 P. 5
What is the LOX safety zone
20 ft radius
MPC 350020.0 P. 5
If LOX spills on asphalt or concrete expansion joint sealant, stop servicing or other operations within a __ __ __ of area…..do not walk or roll equipment over the area of spill for at least __ __
20 ft radius
30 minutes
MPC 350020.0 P. 6
What do you wash the service cart filler valve and airplane fill build up valve with
Octagon OCC(NOC)
MPC 350020.0 P. 6
What are the parking rules for the cart
- 25 ft from any structures having fire resistant or non-combust
ible exterior walls with automatic fire extinguishing systems - 50 ft from combustible structures sources of ignition, heavy
traffic areas or smoking areas - 75 ft from airplane parking, fueling, or defueling areas
- parked with vent valve open and transported with it closed
- parked with the rear end is higher than the front end or the control
panel is higher than the towing end
MPC 350020.0 P. 6
What are the tires inflated to
12-15 psi
MPC 350020.0 P. 10
What do you lubricate the cover hinge and latch of the servicing tank with
MIL-PRF-6086
MPC 350020.0 P. 17
What do you lubricate the handbrake release handle and linkage with
MIL-PRF-6086
MPC 350020.0 P. 19
No reading above __ __ should be read for electrical resistance for the static points
10 ohms
MPC 350020.0 P. 18
What do you lubricate the grease fitting at the bottom of the handbrake lever mechanism and caster wheel swivel joint, pivot sleeve, and locking pin with
Automotive Grease MIL-PRF-10924
MPC 350020.0 P. 23
What do you coat the 2 screws that secure the static grounding cable to the grounding clip with
Silicone sealant MIL-A-46146
MPC 350020.0 P. 24
How many turns for the 50ft and 75ft grounding reel
50ft- 36 full turns
75ft- 47 full turns
AFTO 37A19-3-2 5-3
How close should the fire protection equipment be to the LOX servicing operation
50 ft
MPC 121401.0 p.2
HC 130J
What should be turned off when servicing LOX
Electrical systems not required for servicing
MPC 121401.0 p.2
HC 130J
How large is the radius of the safety zone during oxygen servicing
20ft
MPC 121401.0 p. 2
HC 130J
What maintenance and other servicing operations do you not service oxygen concurrently with
Fuel, oil, water-alcohol, hydraulic fluid, environmental fluid, or any systems containing such hydrocarbon based products
MPC 121401.0 p.2
HC 130J
What do you do when LOX has come in contact with skin
Transport immediately to nearest medical facility. Do not attempt to rewarm affected body parts
MPC 121401.0 p.3
HC 130J
Do not allow LOX to come in contact petroleum products, asphalt, or concrete expansion joint sealant for what reason
Fire or explosion may result.
If it occurs stop all operations with 20ft radius of spill and do not walk or roll equipment over the are for at least 30 minutes, waiting until all fog or frost has disappeared.
MPC 121401.0 p.3
HC 130J
What do you wash the service cart filler valve(hose adapter) and the airplane fill-buildup-vent valve with
Octagon OCC (NOC)
MPC 121401.0 p.3
HC 130J
When parking or storing carts with containers of LOX or gaseous oxygen carts shall be parked as follows
- At least 25 ft from any structure having fire resistant or non-combustible exterior walls or with automatic fire extinguishing systems
- At 50 ft from any combustible structure or sources of ignition including heavy traffic areas where equipment is in operation or smoking areas
- At 75ft from airplane parking fueling or defueling areas
- LOX carts shall be parked with the vent valve open and transported with the vent valve closed
MPC 121401.0 p.3
HC 130J
How should the cart be positioned when servicing a plane
As far away from plane as allowed by length of hose. Ensure the front of the cart, tow hitch, is facing aft of the aircraft with control panel positioned perpendicular to servicing port
MPC 121401.0 p.4
HC 130J
What is the first step after positioning the LOX cart
Set service cart parking brake(automotive type parking brake)
MPC 121401.0 p.4
HC 130J
What do you do before positioning oxygen cart(LOX)
Conduct ramp inspection within a 20ft radius of servicing are, ensuring area is free of petroleum products
MPC 121401.0 p.4
HC 130J
What is 2nd step after positioning LOX cart to plane
Connect ground wire from service cart to same static ground that the airplane is grounded to
MPC 121401.0 p.4
HC 130J
What do you clean aircraft filler valve with
Oxygen cleaning compound Octagon OCC (NOC), using a lint free cloth
MPC 121401.0 p.5
HC 130J
When purging service hose what pressure do you build to and maintain
40 psi (+-5)
MPC 121401.0 p. 5
HC 130J
How many and what valves to you open and close when purging the service hose
4
Build up valve, vent valve, service valve, service drain valve
MPC 121401.0 p.5
HC 130J
What valve is used to maintain the 40(+-5)psi needed for purging and serving oxygen system
Buildup valve(and/or vent valve for purging)
MPC 121401.0 p.5
HC 130J
What manual can you find LOX system servicing information
CGTO 1C-130J-2-35JG-00-1
MPC 121401.0 p.2
HC 130J
What is the number for the LOX servicing cart
TMU-27/M
MPC 121401.0 p.2
HC 130J
What fire extinguisher is used when servicing LOX
HALON 1211 (150 pounds)
MPC 121401.0 p.2
HC 130J
What directive gives proper protective equipment/clothing approved for lox and the material and tools being used
TO 00-25-172
TO 15X-1-1 P. 18 XVI