Oxygen Cylinder and Systems Quiz

These flashcards cover the essential vocabulary and concepts related to oxygen cylinders and systems as discussed in the lecture notes.

To be eligible for recharging, a DOT 3HT oxygen cylinder must have been hydrostatically tested every three years and be retired from service after:

a. 10 years or 5,000 filling cycles.
b. 24 years or 4,380 filling cycles.
c. 15 years or 10,000 filling cycles.

b. 24 years or 4,380 filling cycles.

Which oxygen system employs a regulator that operates only when the user inhales?

a. Demand-flow system.
b. Continuous-flow system.
c. Emergency-flow system.

a. Demand-flow system.

Composite oxygen bottles that conform to DOT-E-8162 have a service life of:

a. 15 years or 10,000 filling cycles whichever occurs first.
b. 10 years or 5,000 filling cycles whichever occurs first.
c. 5 years or 5,000 filling cycles whichever occurs first.

a. 15 years or 10,000 filling cycles whichever occurs first.

What controls the amount of oxygen delivered to a mask in a continuous-flow oxygen system?

a. Calibrated orifice.
b. Pressure reducing valve.
c. Pilot's regulator.

a. Calibrated orifice.

In the diluter demand oxygen regulator, when does the demand valve operate?

a. When the user demands 100 percent oxygen.
b. When the user breathes.
c. When the diluter control is set at normal.

b. When the user breathes.

The primary difference between aviation breathing oxygen and other types of commercially available compressed oxygen is that:

a. aviation breathing oxygen has had all the water vapor removed.
b. aviation breathing oxygen has a higher percentage of water vapor.
c. the other types are usually somewhat less than 99.5 percent pure oxygen.

a. aviation breathing oxygen has had all the water vapor removed.

What is used in some oxygen systems to change high cylinder pressure to low system pressure?

a. Diluter demand regulator.
b. Calibrated fixed orifice.
c. Pressure reducer valve.

c. Pressure reducer valve.

In a high-pressure oxygen system, if the pressure reducer fails, what prevents high-pressure oxygen from entering the system downstream?

a. Check valve.
b. Manifold control valve.
c. Pressure relief valve.

c. Pressure relief valve.

High-pressure cylinders containing oxygen for aviation use can be identified by their:

a. green color and the words BREATHING OXYGEN.
b. yellow color and the words AVIATOR'S BREATHING OXYGEN.
c. green color and the words AVIATOR'S BREATHING OXYGEN.

c. green color and the words AVIATOR'S BREATHING OXYGEN.

Acceptable pressure gauge readings after temperature change are:

a. 446 to 450 psi.
b. 445 to 450 psi.
c. 455 to 460 psi.

b. 445 to 450 psi.

Oxygen used in aircraft systems:

a. is at least 99.5 percent pure and is practically water free.
b. is at least 99.5 percent pure and is the same as hospital oxygen.
c. contains a higher level of water vapor than hospital oxygen.

a. is at least 99.5 percent pure and is practically water free.

Oxygen systems in unpressurized aircraft are generally of the:

a. continuous-flow and pressure-demand types.
b. pressure-demand type only.
c. portable-bottle type only.

a. continuous-flow and pressure-demand types.

The purpose of the airflow metering aneroid assembly is to:

a. regulate airflow in relation to oxygen flow in emergency.
b. automatically switch to emergency if diaphragm ruptures.
c. regulate airflow in relation to cabin altitude.

c. regulate airflow in relation to cabin altitude.

Which are characteristics of a chemical oxygen system?

a. Inert below 400°F and similar distribution system.
b. Adjustable release rate and large storage capacity.
c. Large storage capacity and inert below 400°F.

c. Large storage capacity and inert below 400°F.

What test is used to determine the serviceability of an oxygen cylinder?

a. Pressure test with manometer.
b. Pressure test with nitrogen.
c. Pressure test with water.

c. Pressure test with water.

How often should standard weight high-pressure oxygen cylinders be hydrostatically tested?

a. Every 4 years.
b. Every 3 years.
c. Every 5 years.

c. Every 5 years.

What is the main cause of contamination in a gaseous oxygen system?

a. Dust.
b. Nitrogen.
c. Moisture.

c. Moisture.

When an oxygen system has a leak, lines and fittings should be:

a. bubble tested with special soap solution.
b. removed and replaced.
c. inspected with dye penetrant.

a. bubble tested with special soap solution.

If oxygen bottle pressure drops below minimum, it may cause:

a. moisture to collect in the bottle.
b. pressure reducer to fail.
c. automatic altitude valve to open.

a. moisture to collect in the bottle.

An aircraft oxygen bottle is airworthy if identified:

a. with test date, DOT number, and serial number.
b. with DOT, serial, and manufacturer.
c. with DOT and manufacturer.

a. with test date, DOT number, and serial number.

In a gaseous oxygen system, which are vented to blowout plugs?

a. Pressure relief valves.
b. Filler shutoff valves.
c. Pressure reducer valves.

a. Pressure relief valves.

A high-pressure oxygen cylinder must meet specifications of the:

a. aircraft or cylinder manufacturer.
b. Department of Transportation.
c. National Transportation Safety Board.

b. Department of Transportation.

Before servicing a high-pressure oxygen cylinder, it must have been:

a. approved by NTSB.
b. inspected by mechanic.
c. hydrostatically tested within interval.

c. hydrostatically tested within the proper time interval.

A contaminated oxygen system is normally purged with:

a. compressed air.
b. nitrogen.
c. oxygen.

c. oxygen.

How do you determine oxygen in a portable high-pressure cylinder?

a. Weigh cylinder.
b. Read pressure gauge.
c. Measure at mask.

b. Read the pressure gauge mounted on the cylinder.

What lubricant may be used on oxygen system tapered pipe threads?

a. Glycerine.
b. Petroleum-based sealer.
c. Teflon tape.

c. Teflon tape.

On transport aircraft, an indication of overpressure is:

a. regulator disk missing.
b. cockpit disk missing.
c. green thermal expansion disk missing.

c. The green thermal expansion disk missing.