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31 Cards in this Set
- Front
- Back
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Describe oxygen in its natural state.
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Colorless, odorless, tasteless.
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At altitudes between 10,000 and 15,000 feet, what is the greatest danger from hypoxia?
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Drowsiness
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A complete loss of oxygen in a gaseous oxygen system is prevented by what type of valve?
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Check.
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Supply and distribution tubing for aircraft oxygen systems is identified by cellulose tape in what colors?
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Green and white.
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What valve decreases system pressure in a high-pressure oxygen system.
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Reducer valve.
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In a high-pressure oxygen system, the tubing between the filler valve and the pressure reducer valve is made of..
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copper alloy.
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In a molecular sieve oxygen generating system, water droplets from the air are removed by a..
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MSOGS concentrator inlet filter.
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Liquid oxygen converts to gaseous oxygen at an expansion ratio of..
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860 to 1.
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In a liquid oxygen system, what component has the ability to draw gaseous oxygen from the top of the converter for breathing purposes?
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Pressure vent valve.
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On an aircraft liquid oxygen system, the handle on a manually operated buildup and vent valve is designed to prevent..
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the filler access door from closing in the vent position.
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Which one of these is a disadvantage of a continuous-flow of oxygen regulator?
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It wastes oxygen.
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When the cabin altitude of an aircraft reaches 30,000 feet, what component in the pressure demand oxygen regulator causes 100 percent oxygen to be deliverd to the user?
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Diluter aneroid.
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When the PBG/ON/OFF toggle of an oxygen system is placed in the PBG position, what causes the availability of oxygen and pressure breathing?
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Positive signal from the anit-g valve.
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Which oxygen system allows oxygen to flow automatically to the distribution system when cabin altitude reaches 12,500 feet?
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Troop system.
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An H-2 emergency assembly (bailout bottle) supplies oxygen to the user for a maximum of about how many minutes?
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10
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Assume a capacitance indicating system is being used to indicate the quantity of liquid oxygen in a converter. When the quantity of a liquid oxygen in the converter decreases, what happens to the capacitance of the probe?
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It decreases.
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A liquid oxygen systems pressure fails to stabilize at 110 psi. This could be caused by a failure of the ...
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converter relief valve.
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A liquid oxygen system is continously venting gaseous oxygen overboard. The most probable malfunction is a faulty..
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pressure closing valve.
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You should replace an oxygen mask-to-regulator connector if the no-go portion of the go-no-go gage passes through the..
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smallest internal port.
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The minimum required clearance between oxygen system tubing and aircraft control cables is
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2 inches.
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To reduce vibration and prevent chafing of oxygen system tubing, you should secure long runs of oxygen tubing atleast every..
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15 inches.
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How do you loosen a B-nut from a fiting on the tubing of an oxygen regulator?
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Hold the fitting to prevent twisting of the tubing.
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An aircraft gaseous oxygen system must be purged only with..
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gaseous oxygen.
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On a gaseous oxygen servicing trailer, what controls the flow of oxygen?
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Servicing valves.
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On a gaseous oxygen servicing trailer, what does the purifier assembly remvoe from the gaseous oxygen?
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Moisture.
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When servicing a gaseous oxygen system, you should gradually increase the servicing pressure in order to prevent..
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Overheating of oxygen cylinders.
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What is the service test pressure for a low-pressure gaseous oxygen system leak test?
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425 to 450 psi.
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When performing a high-pressure gaseous oxygen leak test, what minimum amount of time should you wait before taking the second system pressure reading?
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24 hours.
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An oxygen regulator is considered to be leaking excessively if the tester soap bubbles burst in less than how many seconds?
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10
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In an oxygen system, a leak test solutino indicates a leak by...
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bubbling.
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The oxygen regulator field tester primarily uses what type of measurement to determine the condition of an oxygen regulator?
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Pneumatic.
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