Electronic Systems

Question 1

What does a continuity test do?

Answer 1

Makes sure there’s no breaks or shorts in the wire

Question 2

What does a digital multimeter measure?

Answer 2

Voltage, amperage, and resistance ohms and diode check

A TDR identifies how far in feet a break in the wire is

Question 3

What is the pitot static system?

Answer 3

Pitot static tube
3 indicators 
Altimeter 
Rate of climb
Airspeed indicator 
Each indicator operates on air from outside the aircraft

Question 4

Altimeter

Answer 4

Altitude of the aircraft

Question 5

Airspeed indicator

Answer 5

Speed of the aircraft

Question 6

Rate of climb indicator

Answer 6

How fast the aircraft is climbing or descending

Question 7

Barometric Altimeter

Answer 7

Reads altitude from sea level

Question 8

Radar altimeter

Answer 8

Altitude from terrain
Range of 0 to 5000 feet
Accuracy of +3ft or +4% whichever is greater
0 to 1050 indicated on FD

Question 9

Doppler Effect

Answer 9

Change in frequency of a received signal cause by relative motion

Question 10

TDP

Answer 10

Tactical Data Processor

Question 11

CDU

Answer 11

Control display unit

Question 12

DCP

Answer 12

Display control panel

Question 13

MFD

Answer 13

Multi function display

Question 14

HUD

Answer 14

Heads up display
Used with NVG goggles
Provides flight parameter info through NVGs

Question 15

CSC

Answer 15

Communications system control

Question 16

DALS

Answer 16

Downed aviator locator system

Locks on signal from PRC-112 gives direction of flight and distance to find downed aircrew

Question 17

IFF

Answer 17

Identification friend or foe
Replies to interrogations from other aircraft or ships
Respond only capability for H-60
Five modes 
Mode 4 military use only

Question 18

DAFCS

Answer 18

Digital automatic flight control system

Question 19

HSVD

Answer 19

Horizontal situation video display

Primary flight instruments display

Question 20

HF

Answer 20

High frequency

Question 21

UHF

Answer 21

Ultra high frequency

Question 22

VHF

Answer 22

Very high frequency

Question 23

ARI

Answer 23

Azimuth Range Indicator

Question 24

Active sonar

Answer 24

Transmitter sends out signal and listens for return sound waves

Question 25

Passive sonar

Answer 25

Transmitter listens for noise only

Question 26

Azimuth

Answer 26

Target clockwise angular displacement in the horizontal plane with respect to true north

Question 27

Range

Answer 27

Distance of target from transducer

Question 28

MDL

Answer 28

Mission data loader

Programmable data cartridge for flight plans

Question 29

AI

Answer 29

Attitude Indicator

Displays artificial horizon

Question 30

MWS

Answer 30

Missile warning set
Ecm unit designed to protect helicopters against surface to air and air to air missiles
Detects missile fired and provides warning message through the indicator and APR-39

Question 31

LDS

Answer 31

AN/AVR-2 a Laser Detecting Set
Frequency extension of the APR 39
Shares 3 of the 10 RSDS weapons replaceable assemblies
Detects and displays info concerning laser environment around the aircraft

Question 32

FLIR

Answer 32

Forward looking infrared 
Provides real time infrared and daylight imagery for a variety of missions 
Target detection and recognition
SAR
Surveillance

Question 33

What is a thermocouple?

Answer 33

Junction of two dissimilar metals that produce voltage when heated