Sistema de aeronaves

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. Decrease. Increase.

The two gases that make up the majority of the atmosphere are _____ and _____. Nitrogen 78%. Oxygen 21%. Metal 50%. Gas 67%.

Oxygen burn. Does. Does not.

Long exposure at an altitude of 10,000 feet without supplemental oxygen will result in ______ and fatigue. Headache. Heada.

A condition in which the human body is deprived of the oxygen it needs is called. Hypoxia. Hypoxxixixa.

The rate and depth of our breathing is controlled by_____in our blood. Carbon dioxide. Carbon active.

Carbon monoxide is dangerous because it takes the place of the____the brain needs to function. Oxygen. H2O.

The basic difference between ice, water, and steam is the amount of_____each contains. Heat energy. Heat coll.

The basic unit of heat in the U.S. system is the_______and in the metric system it is the. British thermal unit. Calorie. Energy.

Heat energy that causes a material to change its temperature is called_____heat. Sensible. Calor.

Heal energy that causes a material to change its physical state without changing its temperature is called____ heat. Latent. Free.

The two reference points used for measuring temperature are: Freezing point of water. Boiling point of water. Freezing cool.

Absolute zero is the temperature at which there is no______motion. Molecular. Mm.

The absolute temperature scale that uses the same graduations as the Celsius scale is the____scale. Kelvin. Scale.

Pressure that is referenced from zero pressure is called_____pressure. Absolute. Normal.

Pressure that is referenced from the existing atmospheric pressure is called_____pressure. Gage. Full.

Pressure that is referenced from another pressure is called____ pressure. Differential. Actuality.

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 subtance. Specific heat. Heat hot.

Three methods of heat transfer are: Conduction. Convection. Radiation. Suspencion.

A vacuum is usually measured in units of. Inches of mercury. Inches of hierro.

A "deep vacuum" is usually measured in units of. Microns. Nanos.

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 oxygen. Chical roll.

Aviators' oxygen is different from hospital oxygen because of its low_____ content. Water. Cool.

The type of contaminant most generally found in gaseous oxygen systems is_______ content. Water. Low.

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 constituents of the air. Molecular sieve. Milimetrical sieve.