2A252 Vol 3 Stqs

Front 1

What is multiplexing?

Back 1

Process of transmitting information from several sources through one system with different signals staggered in time to form a composite pulse train

Front 2

What is the biggest advantage of multiplexing?

Back 2

Saving time and weight of avionics units

Front 3

What are the four elements of the MIL-STD 1553B data bus system?

Back 3

Bus controller, remote terminal, bus monitor, data bus

Front 4

What may sophisticated bus controller do in the event of data bus failures that may jeopardize the aircraft mission or imperil aircraft safety?

Back 4

Alert the aircraft's pilot

Front 5

What is a protocol error?

Back 5

When incoming command and data are electrically correct but the message is illegal by protocol

Front 6

What factors affect MIL-STD 1553B data bus system reliability and signal quality?

Back 6

Length of main data bus, position/length of stubs, number terminals connected to data bus

Front 7

When are transformer-coupled stubs used in MIL-STD 1553B the data bus?

Back 7

Stub lengths over 20 feet

Front 8

What are the types of words used on the MIL-STD 1553B data bus?

Back 8

Command, status, data

Front 9

What is a command word?

Back 9

Directs a remote terminal to transmit or receive information across the data bus

Front 10

What is a status word?

Back 10

Provides information on status of the remote terminal

Front 11

What is a data word?

Back 11

Contains information to be transferred from one avionics unit to another

Front 12

What is the speed of the fiber optic data bus in its basic figuration?

Back 12

50 Mbps

Front 13

What do some fiber-optic data buses use to gain high-speed message transfer capability?

Back 13

MIL-STD 1553B controlling protocol

Front 14

What type of bus allows for faster transmission of data than traditional data buses?

Back 14

Ethernet

Front 15

What type of protocol does ethernet use?

Back 15

Carrier sense, multiple access, collision detect (CSMACD)

Front 16

Where most data flow through when it is sent between two processors?

Back 16

Through a digital switching module

Front 17

What is the function of the SGU?

Back 17

Processing, analog-to-digital conversion, and symbology generation

Front 18

What component provides the electro-optical interface for the symbology to the pilot and copilot night vision goggles?

Back 18

VSDU

Front 19

What is the purpose of the optical combiner assembly?

Back 19

Transfers image generated by VSDU and mixes it with the forward operating view of NVG's

Front 20

What is the purpose of the pitch correction switch on the VSDS control unit?

Back 20

I was artificial Verizon up or down to center on HUD and HDD field of view

Front 21

What does the VSDS display?

Back 21

Navigation data, airspeed, altitude, attitude, and various cautions

Front 22

How is inertial navigation data provided to the SGU?

Back 22

Via MIL-STD 1553B data bus

Front 23

What do mission computers manage?

Back 23

Overall control of aircraft systems and displays

Front 24

What contains the fault isolation procedures for controlling the mission computer in aircraft equipment during maintenance activities?

Back 24

OMP software

Front 25

What will cause a digital video reformatter to remain at its last setting?

Back 25

Failure of TMIT or central processor

Front 26

Why is the TMIT classified as an intelligent terminal?

Back 26

It contains it's own central processing controls and memory

Front 27

What systems interface with the FSAS in order to provide in-flight advisories to minimize fuel consumption?

Back 27

FMAC

Front 28

What fuel indications does the FSAS provide the aircrew?

Back 28

Fuel quantity, fuel transferred, fuel transfer rate, low pressure warning, and low quantity warning

Front 29

How is advisory data transmitted?

Back 29

Over MIL-STD 1553B data bus from FMAC to CDU

Front 30

What displays the optimum thrust settings and indicated airspeed?

Back 30

MFDs

Front 31

How are the FMAC and CDUs connected to the FSB?

Back 31

Bus couplers

Front 32

Why is ADC output data provided to the FMAC?

Back 32

For airspeed calculations

Front 33

What happens when the IDS detects a fault that is classified as a caution or warning?

Back 33

Associated light is illuminated

Front 34

Where are the IDS fault codes recorded?

Back 34

personal computer memory card international Association (PCMCIA) Removable memory modules (RMM)

Front 35

What happens after the mission computer determines the BIT status of all LRUs connected to the MIL-STD 1553B data bus?

Back 35

BIT status of LRU is monitored

Front 36

Where is recorded IDS diagnostic data downloaded for analysis?

Back 36

MMS

Front 37

What is static pressure?

Back 37

Weight of air above and area

Front 38

What is the standard datum plane?

Back 38

Theoretical playing or atmospheric pressure is 29.92 in/hg and temperature is +15°C

Front 39

What type of pressure enters the pitot opening?

Back 39

Impact

Front 40

What type of pressure enters the static pressure holes?

Back 40

Atmospheric

Front 41

When using a static source in an unpressurized part of the aircraft why is there a small error in the readings?

Back 41

Pressure of the alternate source is lower than atmospheric pressure

Front 42

What are the three basic pitot-static instruments?

Back 42

Airspeed, vertical velocity, and altitude

Front 43

A

Back 43

A