NAVEDTRA 14014A, Airman, Ch. 8 Flashcards
How many primary sources of electrical energy do aircraft have?
Two
What rating maintains aircraft electrical systems?
Aviation Electrician’s Mate (AE)
What is the emergency power source for the aircraft?
Battery
The electrolyte consists of potassium hydroxide and what else?
Water
What is the fundamental unit of the nickel-cadmium aircraft storage battery?
Cell
The sintered-plate nickel-cadmium cells used in the battery consist of what two basic types?
Vented and sealed
What is the principal hazard in working with lead-acid batteries when you are refilling or handling them?
Acid burns
Highly explosive, what collects while batteries are charging and can cause an explosion during battery charging?
Hydrogen gas
If the electrolyte from a nickel-cadmium (NICAD) battery touches your skin or eyes, flush the affected area thoroughly with large quantities of fresh water. Neutralize with vinegar or a weak solution (what percent) of boric acid?
3%
What converts mechanical energy into electrical energy?
Generator
What converts ac power to dc power?
Rectifier
What generators provide emergency electrical power in the event of main electrical power failure?
Emergency generators
What provides compressed air for air-conditioning and pneumatic engine starting?
Gas turbine
What rating maintains the pitot-static system and most aircraft instruments?
AE
The pitot-static system in an aircraft includes some of the instruments that operate on the principle of what?
Barometer
What displays the altitude of the aircraft?
Altimeter
What term means stationary or not changing?
Static
What number of any moving body is its speed compared to the speed of sound in the surrounding medium (local speed)?
Mach
Electrically activated instruments are usually in the form of what with calibrated dials?
Small voltmeters
The pressures of hydraulic systems vary for different models of aircraft. In most pressure systems, the gauges register from 0 to what psi?
3,000
What is an instrument for showing the speed of the power section of a gas turbine engine?
Tachometer
What is used to show engine performance data, fuel flow, engine speed, exhaust gas temperatures, and accelerometer readings?
Vertical scale indicator
What show the pilot the relative position of the aircraft compared to the earth’s horizon?
Attitude indicators
What system provides an accurate indication of aircraft headings through 360° of azimuth?
Gyro
What is the most practical system to use for sending information to many points, as in broadcasting to large numbers of ships or aircraft?
Radio communication
The transmission of intelligible coded radio-frequency waves as Morse code is known as what?
Radiotelegraphy
The transmission of sound intelligence (voice, music, or tones) by continuous radio-frequency waves is known as what?
Radiotelephony
The transmission of still images (weather maps, photographs, sketches, and so forth) over a radio-frequency channel is known as what?
Radiofacsimile
The transmission of typewritten messages over a radio-frequency channel is known as what?
Radioteletype
The transmission of a rapid succession of images (still or moving) over a radio-frequency channel is known as what?
Radiotelevesion
Airborne long-range communications sets normally operate in a band of frequencies from about 3 MHz to what?
30 MHz
Most long-range communications sets are designed for both voice and what other operation?
CW (Morse code)
Short-range airborne communications sets operate in the frequency range from about 30 MHz to 3 GHz. The lower portion of this band is the very-high-frequency (VHF) band; what is the higher portion of the band?
Ultra-High-Frequency (UHF)
Radio waves transmitted at VHF/UHF frequencies are limited to what type of transmission?
Line-of-sight
What is a radio navigational set that provides slant range and relative bearing to a transmitting ground (surface) station?
TACAN
What is a space-based radio position and navigation system designed to provide highly accurate three- dimensional position, velocity, and time data to suitably equipped aircraft anywhere on or near the earth?
GPS
What type of navigation is based on a radar wave transmission beamed toward the earth behind the aircraft?
Doppler navigation
What is an automatic aid to navigation that is independent of outside references?
Inertial Navigation System (INS)
What is a radio device used to detect objects at distances much greater than is visually possible?
Radar
What principle does radar work on?
Echo
Sound waves travel about how many feet per second?
1,100
Radio waves travel at the speed of light (about how many miles per second)?
186,000
Radio waves travel about how many yards in a millionth of a second?
330
What rating maintains AEW equipment?
AT
What gathers intelligence from the enemy’s electronic devices and make the devices ineffective?
ECM
Electronic countermeasures consist of what two general types of actions?
Passive and Active
What type of ECM operations are those that cannot be directly detected by the enemy?
Passive
ECM can detect a radar pulse transmission at how many times the distance the radar returns can detect a target?
11⁄2
What is an expendable electronic listening device dropped into water from carrier-based and land-based patrol aircraft?
Sonobuoy
