NAVEDTRA 14014A, Airman, Ch. 8 Flashcards Preview

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Flashcards in NAVEDTRA 14014A, Airman, Ch. 8 Deck (49):
1

How many primary sources of electrical energy do aircraft have?

Two

2

What rating maintains aircraft electrical systems?

Aviation Electrician's Mate (AE)

3

What is the emergency power source for the aircraft?

Battery

4

The electrolyte consists of potassium hydroxide and what else?

Water

5

What is the fundamental unit of the nickel-cadmium aircraft storage battery?

Cell

6

The sintered-plate nickel-cadmium cells used in the battery consist of what two basic types?

Vented and sealed

7

What is the principal hazard in working with lead-acid batteries when you are refilling or handling them?

Acid burns

8

Highly explosive, what collects while batteries are charging and can cause an explosion during battery charging?

Hydrogen gas

9

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%

10

What converts mechanical energy into electrical energy?

Generator

11

What converts ac power to dc power?

Rectifier

12

What generators provide emergency electrical power in the event of main electrical power failure?

Emergency generators

13

What provides compressed air for air-conditioning and pneumatic engine starting?

Gas turbine

14

What rating maintains the pitot-static system and most aircraft instruments?

AE

15

The pitot-static system in an aircraft includes some of the instruments that operate on the principle of what?

Barometer

16

What displays the altitude of the aircraft?

Altimeter

17

What term means stationary or not changing?

Static

18

What number of any moving body is its speed compared to the speed of sound in the surrounding medium (local speed)?

Mach

19

Electrically activated instruments are usually in the form of what with calibrated dials?

Small voltmeters

20

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

21

What is an instrument for showing the speed of the power section of a gas turbine engine?

Tachometer

22

What is used to show engine performance data, fuel flow, engine speed, exhaust gas temperatures, and accelerometer readings?

Vertical scale indicator

23

What show the pilot the relative position of the aircraft compared to the earth's horizon?

Attitude indicators

24

What system provides an accurate indication of aircraft headings through 360° of azimuth?

Gyro

25

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

26

The transmission of intelligible coded radio-frequency waves as Morse code is known as what?

Radiotelegraphy

27

The transmission of sound intelligence (voice, music, or tones) by continuous radio-frequency waves is known as what?

Radiotelephony

28

The transmission of still images (weather maps, photographs, sketches, and so forth) over a radio-frequency channel is known as what?

Radiofacsimile

29

The transmission of typewritten messages over a radio-frequency channel is known as what?

Radioteletype

30

The transmission of a rapid succession of images (still or moving) over a radio-frequency channel is known as what?

Radiotelevesion

31

Airborne long-range communications sets normally operate in a band of frequencies from about 3 MHz to what?

30 MHz

32

Most long-range communications sets are designed for both voice and what other operation?

CW (Morse code)

33

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)

34

Radio waves transmitted at VHF/UHF frequencies are limited to what type of transmission?

Line-of-sight

35

What is a radio navigational set that provides slant range and relative bearing to a transmitting ground (surface) station?

TACAN

36

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

37

What type of navigation is based on a radar wave transmission beamed toward the earth behind the aircraft?

Doppler navigation

38

What is an automatic aid to navigation that is independent of outside references?

Inertial Navigation System (INS)

39

What is a radio device used to detect objects at distances much greater than is visually possible?

Radar

40

What principle does radar work on?

Echo

41

Sound waves travel about how many feet per second?

1,100

42

Radio waves travel at the speed of light (about how many miles per second)?

186,000

43

Radio waves travel about how many yards in a millionth of a second?

330

44

What rating maintains AEW equipment?

AT

45

What gathers intelligence from the enemy's electronic devices and make the devices ineffective?

ECM

46

Electronic countermeasures consist of what two general types of actions?

Passive and Active

47

What type of ECM operations are those that cannot be directly detected by the enemy?

Passive

48

ECM can detect a radar pulse transmission at how many times the distance the radar returns can detect a target?

11⁄2

49

What is an expendable electronic listening device dropped into water from carrier-based and land-based patrol aircraft?

Sonobuoy