oxygen systems Flashcards
SIGNS AND SYMPTOMS OF HYPOXIA
- increased breathing and ______ rate
- ________ in level of consciousness
- restless____
- cyanosis (____ lips and nail beds)
- chest ____
SIGNS AND SYMPTOMS OF HYPOXIA
- increased breathing and HEART rate
- CHANGES in level of consciousness
- restlessNESS
- cyanosis (BLUE lips and nail beds)
- chest PAIN
CONTINUOUS FLOW OXYGEN SYSTEM
pressurised aircraft are provided with oxygen for use by the passengers and crew during low cabin pressure _____________
these oxygen systems are also ___________ flow type and are to be brought into use when the cabin __________ exceeds __000ft
CONTINUOUS FLOW OXYGEN SYSTEM
pressurised aircraft are provided with oxygen for use by the passengers and crew during low cabin pressure EMERGENCIES
these oxygen systems are also CONTINUOUS flow type and are to be brought into use when the cabin ALTITUDE exceeds 10000ft
CREW MASKS. QUICK DON MASK
these masks must demonstrate the ability to be donned with ___ hand in _ seconds or less, while accommodating __________ glasses
after the mask has been fitted over the nose and mouth, the release levers are released and the oxygen which had _________ the harness is exhausted to atmosphere, the ____________ harness now contracts and tightens on the head of the crew member
CREW MASKS. QUICK DON MASK
these masks must demonstrate the ability to be donned with ONE hand in 5 seconds or less, while accommodating PRESCRIPTION glasses
after the mask has been fitted over the nose and mouth, the release levers are released and the oxygen which had INFLATED the harness is exhausted to atmosphere, the ELASTICATED harness now contracts and tightens on the head of the crew member
CREW SMOKE MASK SET
smoke sets consist of a full face _____ for eye protection, with an inner mask to cover the mouth and nose and through which the _______ flows
CREW SMOKE MASK SET
smoke sets consist of a full face MASK for eye protection, with an inner mask to cover the mouth and nose and through which the OXYGEN flows
GASEOUS OXYGEN STORAGE
the cylinders are provided with an over ________ relief facility
this takes the form of a ________ disc which will allow oxygen to escape to the outside of the aircraft should the cylinder pressure rise to approximately __00psi
a ______ discharge indicator disc blows out when an oxygen cylinder relief valve operates
when the indicator disc has blown out, it will expose the ___ interior of the discharge fitting
alternatively orange _______ will be released from the indicator to show that oxygen has been released
GASEOUS OXYGEN STORAGE
the cylinders are provided with an over PRESSURE relief facility
this takes the form of a BURSTING disc which will allow oxygen to escape to the outside of the aircraft should the cylinder pressure rise to approximately 2800psi
a GREEN discharge indicator disc blows out when an oxygen cylinder relief valve operates
when the indicator disc has blown out, it will expose the RED interior of the discharge fitting
alternatively orange STREAMS will be released from the indicator to show that oxygen has been released
DILUTER DEMAND OXYGEN
a typical diluter demand regulator operates as follows:
- with the oxygen supply on, and _______ oxygen selected by the appropriate control lever on the regulator, ________ oxygen in accordance with cabin altitude will be supplied to the crew members mask when the user ________. the amount of air mixed with oxygen is controlled by the regulator and the air decreases with an increase in cabin altitude until a cabin altitude of __000 feet is reached when approximately ___% oxygen is supplied
- if the crew member selects 100% oxygen the regulator air valve is closed and 100% oxygen is supplied when the user inhales, __________ of cabin altitude
- if emergency is selected, e.g. to provide protection against smoke and other harmful gases, a flow of 100% is supplied at _________ pressure to avoid any inward leakage into the mask. depending on the type of regulator, the oxygen may either flow only when the user inhales, or continuously and irrespective of the users respiration cycle
DILUTER DEMAND OXYGEN
a typical diluter demand regulator operates as follows:
- with the oxygen supply on, and NORMAL oxygen selected by the appropriate control lever on the regulator, DILUTED oxygen in accordance with cabin altitude will be supplied to the crew members mask when the user INHALES. the amount of air mixed with oxygen is controlled by the regulator and the air decreases with an increase in cabin altitude until a cabin altitude of 32000 feet is reached when approximately 100% oxygen is supplied
- if the crew member selects 100% oxygen the regulator air valve is closed and 100% oxygen is supplied when the user inhales, IRRESPECTIVE of cabin altitude
- if emergency is selected, e.g. to provide protection against smoke and other harmful gases, a flow of 100% is supplied at POSITIVE pressure to avoid any inward leakage into the mask. depending on the type of regulator, the oxygen may either flow only when the user inhales, or continuously and irrespective of the users respiration cycle
CHEMICAL OXYGEN GENERATOR SYSTEMS
the chemical oxygen generator has some advantages compared with a gaseous oxygen supply:
- no need for high pressure ________ cylinders, distribution _____, regulators and therefore a saving in ______
- improved ________ as each individual generator is a self ________ unit. one generator malfunction would not affect the remainder (compared with broken pipes or excessive leakage in a gaseous system)
- reduced __________
- no regular ___________ required
- _____ components
- if an emergency descent has taken place and the generators have been used, they are simply _________
CHEMICAL OXYGEN GENERATOR SYSTEMS
the chemical oxygen generator has some advantages compared with a gaseous oxygen supply:
- no need for high pressure STORAGE cylinders, distribution PIPES, regulators and therefore a saving in WEIGHT
- improved RELIABILITY as each individual generator is a self CONTAINED unit. one generator malfunction would not affect the remainder (compared with broken pipes or excessive leakage in a gaseous system)
- reduced MAINTENANCE
- no regular REPLENISHMENT required
- FEWER components
- if an emergency descent has taken place and the generators have been used, they are simply REPLACED
CHEMICAL OXYGEN GENERATOR SYSTEMS
gaseous oxygen generators which are time ________ or which have been used must ___ be transported by air
new or unused generators intended for air transport must be prepared for carriage IAW current __________ goods by air regulations and are not to be carried on __________ aircraft
CHEMICAL OXYGEN GENERATOR SYSTEMS
gaseous oxygen generators which are time EXPIRED or which have been used must NOT be transported by air
new or unused generators intended for air transport must be prepared for carriage IAW current DANGEROUS goods by air regulations and are not to be carried on PASSENGER aircraft
TYPICAL CREW OXYGEN SYSTEM. DESCRIPTION AND OPERATION. OVERBOARD DISCHARGE
if the crew cylinder becomes over pressurised, the ________ relief valve, on the cylinder ____, opens. the high pressure oxygen routes through an overboard _________ line to the overboard discharge port. when pressure in the overboard discharge line reaches _00psi a _____ disk in the overboard discharge port pops out and lets the oxygen escape
the disc is held in place by a ____ ring. the overboard discharge port is adjacent to the ____ wheel well on the lower _____ side of the fuselage
the green disc is easily seen during ___-flight check
TYPICAL CREW OXYGEN SYSTEM. DESCRIPTION AND OPERATION. OVERBOARD DISCHARGE
if the crew cylinder becomes over pressurised, the THERMAL relief valve, on the cylinder NECK, opens. the high pressure oxygen routes through an overboard DISCHARGE line to the overboard discharge port. when pressure in the overboard discharge line reaches 500psi a GREEN disk in the overboard discharge port pops out and lets the oxygen escape
the disc is held in place by a SNAP ring. the overboard discharge port is adjacent to the NOSE wheel well on the lower RIGHT side of the fuselage
the green disc is easily seen during PRE-flight check
OXYGEN SAFETY PRECAUTIONS
the following precautions must be observed when working on or near oxygen equipment:
- keep ___ and grease away
- keep oxygen away from ____
- keep all equipment _____
- protect oxygen masks from direct ________ and dust. store in correct containers
- inspect oxygen storage ___________.
- no ________
- mix and match ___________ with caution
- handle oxygen components _________
- don’t mix oxygen. don’t use oxygen in any ________ not designed for it. only use aviation breathing oxygen in aircraft systems
- always follow the ___
- never exceed specified _________
- always charge _______
OXYGEN SAFETY PRECAUTIONS
the following precautions must be observed when working on or near oxygen equipment:
- keep OIL and grease away
- keep oxygen away from FIRE
- keep all equipment CLEAN
- protect oxygen masks from direct SUNLIGHT and dust. store in correct containers
- inspect oxygen storage CONTAINERS.
- no SMOKING
- mix and match COMPONENTS with caution
- handle oxygen components CAREFULLY
- don’t mix oxygen. don’t use oxygen in any SYSTEM not designed for it. only use aviation breathing oxygen in aircraft systems
- always follow the AMM
- never exceed specified PRESSURES
- always charge SLOWLY
REPLENISHMENT OF GASEOUS OXYGEN SYSTEMS
to prevent excessive ____________ being built up in the pipelines from the charging point to the cylinders, thermal ____________ are installed.
the compensators act as a heat ______ to disperse any build up of heat from the charging process
a compensator consists of a _____ like wire element approximately 5 inches long, inserted into a stainless steel tube provided with __________ at each end
there are ___ types of of thermal compensators in use, one for connection to oxygen __________, and other other for connection to ____ off valves or __________. those fitted to oxygen cylinders have a ________ nut fitting that attaches directly to a cylinder and the downstream end has a _________ tube connection
the second type of compensator is attached to the component by means of a _________ resistant steel union through which the wire element extends. a flareless tube connection is fitted to the ________ end.
when thermal compensators are fitted they are accompanied by a _______ indicating the correct method of removal
to prevent the incorrect gas being used to charge oxygen systems, a ____ hand threaded charging valve may be used
REPLENISHMENT OF GASEOUS OXYGEN SYSTEMS
to prevent excessive TEMPERATURES being built up in the pipelines from the charging point to the cylinders, thermal COMPENSATORS are installed.
the compensators act as a heat SHRINK to disperse any build up of heat from the charging process
a compensator consists of a BRUSH like wire element approximately 5 inches long, inserted into a stainless steel tube provided with CONNECTORS at each end
there are TWO types of of thermal compensators in use, one for connection to oxygen CYLINDERS, and other other for connection to SHUT off valves or REGULATORS. those fitted to oxygen cylinders have a COUPLING nut fitting that attaches directly to a cylinder and the downstream end has a FLARELESS tube connection
the second type of compensator is attached to the component by means of a CORROSION resistant steel union through which the wire element extends. a flareless tube connection is fitted to the UPSTREAM end.
when thermal compensators are fitted they are accompanied by a PLACARD indicating the correct method of removal
to prevent the incorrect gas being used to charge oxygen systems, a LEFT hand threaded charging valve may be used
