Aircraft systems firts 30%

A decrease in the temperature of the air causes the density to _______. increase. decrease.

A decrease in the pressure of the air causes the density to ________. increase. decrease.

The two gases that make up the majority of the atmosphere are ________ and ________. nitrogen, oxigen. hidrogen, oxigen.

Oxygen ________ burn. does. does not.

Long exposure at an altitude of 10_,000 feet without supplemental oxygen will result in ________ and fatigue. headache. surmenagge.

A condition in which the human body is deprived of the oxygen it needs is called ________. hypoxia. brain fail.

The rate and depth of our breathing is controlled by ___________ in our blood. carbon dioxide. carbon monoxide.

Carbon monoxide is dangerous because it takes the place of the _______ the brain needs to function. oxigen. cells.

The basic difference between ice, water, and steam is the amount of __________ each contains. heat energy. temperature.

The basic unit of heat in the English system is the _____________ , and in the metric system it is the _________. british termal unit, calorie. fahrenheit, rankin.

Heat energy that causes a material to change its temperature is called ________ heat. sensible. latent.

Heat energy that causes a material to change its physical state without changing its temperature is called _______ heat. latent. sensible.

The two reference points used for measuring temperature are: A. the freezing point of water B. the boil point of water. A. the freezing point of water B. evaporating point of water.

Absolute zero is the temperature at which there is no _________ motion. atoms. molecules.

The absolute temperature scale that uses the same graduations as the Celsius scale is the _______ scale. kelvin. rankin.

Pressure that is referenced from zero pressure is called pressure. absolute. differential.

Pressure that is referenced from the existing atmospheric pressure is called ___________ pressure. Gage. reference.

Pressure that is referenced from another pressure is called ____________ pressure. differential. absolute.

The number of Btu of heat energy needed to change the temperature of one pound of a substance one degree Fahrenheit is called the ______________ of the substance. specific heat. latent heat.

Three methods of heat transfer are: a. conduction b. convection c. radiation. a. conduction b. convection c. refraction.

A vacuum is usually measured in units of _____________ . inches of mercury. milibars of mercury.

A "deep vacuum" is usually measured in units of ______________. microns. milibars.

When oxygen is needed for a backup in a pressurized aircraft the _______________system is used because of its simplicity, efficiency, and minimum maintenance required. chemical oxigen candle. chemical oxigen generator.

Aviators oxygen is different from hospital oxygen because of its low _______ content. water. hidrogen.

The type of contaminant most generally found in gaseous oxygen systems is _______ . water. fuel.

In the onboard oxygen generating system (OBOGS), engine compressor bleed air flows through beds of a ____________ material that mechanically filters the oxygen from the nitrogen and other. molecular sieve. sieve.

The rate of release of the oxygen from a chemical oxygen candle system ________ be adjusted for the altitude flow. may. maynot.

The generators used in a chemical oxygen candle system are inert below ______ °F even under a severe impact. 400. 200.

Supplemental oxygen is normally provided for passengers of a pressurized aircraft by the ____________ -type system. continuous-flow. demand.

In a continuous-!low oxygen system, the pressure of the oxygen in the high-pressure cylinder is reduced before it goes to the regulator by a/an _________________ valve. pressure reducer. pressure amplifier.

If the pressure reducer valve in a continuous-flow oxygen system should malfunction, a ____________ valve will prevent damage to the system. pressure relief. pressure dump.

Two types of regulators that may be used in a continuous-flow oxygen system are _______ and _______ regulator. manual, automatic. contimuous flow, demand.

The amount of oxygen a regulator will deliver to flow to a continuous-flow mask is determined by a ____________ in the mask outlet. calibrated oriffice. therapeutic oriffice.

The continuous-flow oxygen mask worn by a person with a known respiratory or heart problem should receive its oxygen from a ____________ mask outlet. therapeutic. medical.

A rebreather-bag-type oxygen mask is used with a ____________ -type oxygen system. continuous-flow. demand.

The cockpit crew of a pressurized aircraft normally have their supplemental oxygen supplied by a ______. continuous-flow. demand.

A diluter-demand oxygen regulator dilutes the oxygen it meters at the lower altitudes with _______ . aneroid. analogic.

The demand valve on a diluter-demand oxygen regulator opens each time the wearer of the mask _______. inhales. exhales.

High-pressure oxygen cylinders installed in an aircraft must meet the specifications of the ________________ or the ________________. inter state Commerce comission ICC, departament of transportation DOT. inter state Commerce comission ICC, departament of technicians DOT.

Oxygen cylinders are required to be ____________ tested periodically and the date of the test stamped on it. hydrostatically. electrostatically.

Standard high-pressure oxygen cylinders should be hydrostatically tested every _____ years. five. three.

Lightweight high-pressure oxygen cylinders should be hydrostatically tested every _____ years. five. three.

A lightweight high-pressure oxygen cylinder should be hydrostatically tested to a pressure of ______ psi. 3.083. 3.081.

A lightweight high-pressure oxygen cylinder should be retired from service after _____ years. 15. 5.

The pressure inside an oxygen bottle should never be allowed to drop below _____ psi. 50. 60.

High-pressure oxygen bottles are painted _______ . green. yelow.

Low-pressure oxygen bottles are painted _______. green. yelow.

The amount of oxygen in a gaseous oxygen bottle is indicated by its ________. pressure. temperature.

If a gaseous oxygen system is to be charged to 1,850 psi at 70°F when the ambient temperature is 60°F, the filling pressure should be _________ psi. 1,925. 1,850.

Any time an oxygen system has been opened, it should be purged for about _____ minutes to remove a ll of the air from the oxygen lines. ten. five.

Thread lubricants used with oxygen system components must contain no. petroleum. water.

Leaks in an oxygen system are located by spreading a __________ soap solution over the suspected area and watching for bubbles. nonpetroleum. special.

A blowout plug on the side of the fuselage will be blown out if the oxygen system has been discharged through the .___________________. pressure relief valve. outflow valve.

Thread lubricants approved for use in an oxygen system have a/an _______ base. water. oil.

Pressurization air for reciprocating-engine-powered general aviation aircraft is compressed by the __________________ . turbocharger. compressor.

Two types of mechanical compressors used to supply pressurizing air for a reciprocating-engine-powered airplane are: A. roots blower type B.centrifugal type. A. roots blower type B.axial type.

When two or more mechanical air compressors supply the cabin pressure for a pressurized aircraft, the loss of cabin pressure if one compressor should fail is prevented by a delivery air duct ____________ valve. check. dump.

In a turbine-engine-powered aircraft the air for pressurization comes from the _________________ section of the engine. compressor. turbine.

The air used for pressurizing a turbine-engine-powered aircraft is called ___________ air. engine bleed air. compressor bleed air.

The cabin altitude is the same as the flight altitude when the aircraft is operating in the ________________ mode. unpressurised. isobaric.

The cabin altitude is maintained at a constant value as the fl ight altitude changes when the pressurization system is operating in the mode_______________. isobaric. differential.

The cabin pressure is maintained a given amount higher than the outside air pressure when the pressurization system is operating in the ____________________________mode. constant differential. simple unpressurised.

The maximum differential pressure allowed in a pressurized aircraft is determined by the strength of the ______________________ . pressure vesel. out flow pressure.

The amount of air the cabin pressure regulator in Figure 9-23 al lows to leave the cabin is determined by the ________ pressure. out-flow. dump.

When the cabin pressure regulator in Figure 9-23 is operating in the isobaric mode, cabin pressure is held constant by reducing the now of reference-chamber air through the isobaric ______________valve. metering. dump.

Refer to Figure 9-23. Anytime an increase in cabin pressure causes the isobaric metering valve to move toward the OPEN position, the outflow valve _______________. opens. closes.

Refer to Figure 9-23. When the outside air pressure decreases enough that the difference between the cabin pressure and the outside pressure reaches the pressure-differential limit allowed by the airframe manufacturer, the differential metering valve ______________. opens. closes.

Refer to Figure 9-23. The isobaric metering valve is controlled by the ________. bellows. diaphragm.

Refer to Figure 9-23. The differential metering valve is controlled by the ________. diaphragm. bellows.

lf the cabin rate of climb is too great, the rate control will cause the outflow valve to close _______. faster. slower.

A negative-pressure relief valve is incorporated in a pressurization system to prevent cabin pressure ever becoming ________________ than the surrounding air pressure. lower. higher.

All positive pressure inside the cabin is relieved when the aircraft is on the ground by the ______ valve opening. dump. out-flow.

If "auxiliary ventilation" is selected on the pressurization control while cruising at altitude, cabin pressurization will be dumped, and the cabin altitude will ________________. decrease. increase.

Airflow is increased in some areas of an aircraft by using a _____________ to augment the airflow. jet pump. bost pump.

Aircraft that are heated with exhaust system heaters should have ____________ detectors installed on the instrument panel. carbon monoxide. fire and smoke.

Two types of airflow through a combustion heater are __________ air and _________ air. combustion, ventilating. bleed, impact.

Too much combustion air is prevented from flowing through a combustion heater by either a combustion air _________ valve or a ______________ regulator. relief, differential pressure. check, differential pressure.

Regular ma intenance of a combustion heater consists of cleaning or replacing the fuel ________ and checking all connections for ._________. filters, leaks. fillers, leaks.

The temperature produced by a combustion heater is controlled by the thermostat which controls the _______ going to the heater. fuel. air.