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2208- Rodina midterm
Rodina midterm
| Question | Answer |
|---|---|
| Usually, most of the load placed on an APU occurs when? | the bleed air valve is opened. |
| When in operation, the speed of an APU? | remains at or near rated speed regardless of the load condition. |
| Generally, when maximum APU shaft output power is being used in conjunction with pneumatic power? | pneumatic loading will be automatically modulated to maintain a safe EGT. |
| Frequently, an aircraft's auxiliary power unit (APU) generator? | is identical to the engine-driven generators. |
| An APU is usually rotated during start by? | an electric starter. |
| When necessary, APU engine cooling before shutdown may be accomplished by? | closing the bleed air valve. |
| Fuel is normally supplied to an APU from the? | airplane's main fuel tank. |
| On APU's equipped with a free turbine and load compressor, the primary function of the load compressor is to | provide bleed air for aircraft pneumatic systems. |
| Fuel scheduling during APU start and under varying pneumatic bleed and electrical loads is maintained? | automatically by the APU fuel control system. |
| The function of an APU air inlet plenum is to? | stabilize the pressure of the air before it enters the compressor. |
| When an aircraft's oxygen system has developed a leak, the lines and fittings should be? | bubble tested with a special soap solution manufactured specifically for this purpose. |
| In a high-pressure oxygen system, if the pressure reducer fails, what prevents high-pressure oxygen from entering the system downstream? | Pressure relief valve. |
| Composite oxygen bottles that conform to DOT-E-8162 have a service life of? | 15 years or 10,000 filling cycles whichever occurs first. |
| In the diluter demand oxygen regulator, when does the demand valve operate? | When the user breathes. |
| On transport category aircraft what might be an indication of an over pressure event of the aircraft oxygen system? | The green thermal expansion disk missing. |
| How should you determine the amount of oxygen in a portable, high-pressure cylinder? | Read the pressure gauge mounted on the cylinder. |
| If oxygen bottle pressure is allowed to drop below a specified minimum, it may cause? | moisture to collect in the bottle. |
| What may be used as a lubricant on oxygen system tapered pipe thread connections? | Teflon tape. |
| High-pressure cylinders containing oxygen for aviation use can be identified by their? | green color and the words AVIATOR'S BREATHING OXYGEN stenciled in 1-inch white letters. |
| What controls the amount of oxygen delivered to a mask in a continuous-flow oxygen system? | Calibrated orifice. |
| The primary difference between aviation breathing oxygen and other types of commercially available compressed oxygen is that? | aviation breathing oxygen has had all the water vapor removed. |
| The purpose of the airflow metering aneroid assembly found in oxygen diluter demand regulators is to? | regulate airflow in relation to cabin altitude when in diluter demand position. |
| Before a high-pressure oxygen cylinder is serviced, it must be the correct type and have been? | hydrostatically tested within the proper time interval. |
| Oxygen systems in unpressurized aircraft are generally of the? | continuous-flow and pressure-demand types. |
| What is the main cause of contamination in a gaseous oxygen system? | Moisture. |
| Oxygen used in aircraft systems is what? | is at least 99.5 percent pure and is practically water free. |
| In a gaseous oxygen system, which of the following are vented to blow out plugs in the fuselage skin? | Pressure relief valves. |
| What is used in some oxygen systems to change high cylinder pressure to low system pressure? | Pressure reducer valve. |
| For use in pressurized aircraft, which is generally the least complicated and requires the least maintenance? | Chemical oxygen generator systems. |
| Which of the following are characteristics of a chemical or solid-state oxygen system? | A volume storage capacity about three times that of compressed oxygen and system generators that are inert below 400°F, even under severe impact. |
| If a high-pressure oxygen cylinder is to be installed in an airplane, it must meet the specifications of the? | Department of Transportation. |
| What test is used to determine the serviceability of an oxygen cylinder? | Pressure test with water. |
| Which oxygen system employs a regulator that operates only when the user inhales? | Demand-flow system. |
| How often should standard weight high-pressure oxygen cylinders be hydrostatically tested? | Every 5 years. |
| To be eligible for recharging, a DOT 3HT oxygen cylinder must have been hydrostatically tested every three years and be retired from service after? | 24 years or 4,380 filling cycles. |
| An aircraft oxygen bottle may be considered airworthy if it has been hydrostatically tested and identified? | with the test date, DOT number, and serial number stamped on the cylinder near the neck. |
| A contaminated oxygen system is normally purged with? | oxygen. |
| How pure is aviators 02? | 99.5% |
| Uses a re-breather bag? | Continuous flow system |
| Regulators lower the psi to? | 40-75 psig |
| demand system is for? | O2 is delivered when user inhales |
| A green bottle is? | a high pressure cylinder |
| What is a high pressure cylinders psi? | 1850 psi |
| What is Stenciled on aircraft 02 bottle? | "Aviators Breathing Oxygen" in white 1 inch letters |
| Lowest psi in cylinder before servicing? | 50 psi |
| the major O2 system contaminate? | moisture |
| Pressure test with water is called? | Test to verify serviceability of 02 cylinder (Hydro static test) |
| Controls the amount of 02 flow in a continuous flow mask? | Calibrated orifice |
| Changes high cylinder psi to low system psi? | Pressure reducer valve |
| The diluter in a diluter demand system? | mixes supplied O2 with Cabin air |
| Visual indication of an over psi? | Green blow out plugs on the fuselage. |
| DOT 3AA cylinder hydro test psi? | 3,085 psi |
| 3 components of an aircraft 02 system? | Cylinder, mask, regulator |
| High psi cylinder psi? | 1850 psi or (1800-2000) psi |
| Portable 02 system used for? | Short and above 10K feet |
| High storage capacity & low mtc? | Chemical 02 advantages |
| Not used on commercial flights? | LOX |
| Vented to the blowout plug? | Pressure relief valve |
| System in un-psi'd aircraft? | continuous flow and pressure demand types |
| The purpose of the airflow metering aneroid assembly in 02 diluter demand regulator? | Regulate airflow in relation to cabin altitude |
| What to do if the system has a leak? | Bubble test with a special |
| Tape used to aid in sealing and lubricating threads? | Teflon |
| the rate at which the aircraft altitude is increasing or decreasing? | rate-of-climb |
| the structure that separates the pressurized side and unpressurized side of the aircraft? | Pdome |
| an air source used to pressurize the turbine engine aircraft? | engine bleed air |
| 8000 feet for transport category aircraft? | max altitude |
| 21 is for air conditioning and pressurization? | AtA |
| the section of a turbine engine that provides the air for pressurization? | compressor |
| the valve that prevents the cabin altitude from becoming higher that airplane altitude? | negative pressure valve |
| valve that controls the pressure inside the aircraft cabin? | outflow valve |
| the safety valve uses the same/different controller? | same |
| used on a reciprocating engine to supply pressure for pressurizing an aircraft? | turbo charger |
| the pressure relief valve that prevents the cabin from becoming over pressurized? | positive pressure relief valve |
| which components uses inputs of: barometric pressure, cabin alt and rate of change? | controller |
| to pressurize an A/C on the ground it must be in? | air mode |
| the pressure in the cabin of an airplane is usually designated as not psi? | cabin altitude |
| pressure measured in inches of mercury, absolute? | barometric pressure |
| a specially shaped restriction in a tube designed to speed up the flow of air, altering the pressure? | venturi |
| what operates the outflow valve on most large A/C? | electric motor |
| the portion of the structure of a pressurized aircraft that is sealed and pressurized in flight? | pressure vessel |
| mode of cabin pressurization in which the controller maintains a constant difference between the cabin alt. and barometric? | differential |
| valve used to stop decompression of the A/C if the delivery air check valve is inoperable? | SOV |
| the valve controlled by the W.O.W. switch? | dump valve |
| one complete series of events or operations that recur regularly? | cycle |
| what is the ATA for oxygen? | 35 |
| what is the ATA for APU? | 49 |
| what is the ATA for air conditioning and pressurization systems? | 21 |
Created by:
Lucas1999