Part 66 Preparation: Avionics

Module 05. Digital Techniques

Quiz

Typical displays on an EHSI are?
1. VOR, Map, Plan and weather radar
2. Engine indications
3. VOR, Plan, Map and Attitude
Engine parameters are displayed on?
1. EHSI
2. ECAM
3. FMSCDU
EADI displays show ?
1. pitch, roll and waypoints
2. pitch and roll attitudes
3. heading and weather radar
The binary number 11010111 expressed as a decimal is ?
1. 215
2. 223
3. 207
The octal number 1001 expressed as a decimal is?
1. 65
2. 9
3. 513
What is 345 in binary?
1. 100111001
2. 101011001
3. 110011001
The BITE indicator on a DFDR shows Yellow colour. This indicates?
1. power is ON and DFDR is recording data
2. power is OFF or DFDR is at Fault
3. power is ON but DFDR is not recording data
FMS CDU warnings are ?
1. OFST and Fail
2. MSG, fail and OFST
3. Fail and MSG
What warnings can an FMS provide?
1. Spurious faults
2. Ground faults only
3. Discrete warnings
The Flight data recorder starts recording?
1. after the first engine has started
2. on aircraft roll out from stand
3. after the first engine has started
An Inertial Navigation System (INS/IRS) computes distance from acceleration by?
1. two successive integrations
2. a simple integration
3. a differentiation followed by an integration
The accepted error from INS/IRS is?
1. 2 miles per hour + 3 miles
2. 3 miles / hour + 3 miles
3. 1 mile/hour+3 miles
Fly-by-wire load alleviation function in turbulent conditions will result in?
1. spoilers moving symmetrically upwards
2. ailerons moving symmetrically upwards
3. ailerons and spoilers moving symmetrically upwards
IRS accelerometers are mounted ?
1. 60° to each other
2. 45° to each other
3. 90° to each other
An FMS databank memory is updated ?
1. every 365 days
2. every 28 days
3. every 32 days
MFD is the abbreviation for?
1. Mandatory flight display
2. Multi function display
3. Master flight display
Which of the following could be a primary cause of HIRF protection failure ?
1. Broken or missing static wicks
2. Corrosion on bonding leads
3. Unserviceable radio filters
Who is responsible for producing the operational program of the FMS?
1. The pilot
2. The manufacturer
3. The engineer
Electrostatic discharge occurs when?
1. the ground lead on a wrist strap touches the skin
2. materials are rubbed together or pulled apart
3. materials of different potential are brought in close proximity to each other
During an EFIS screen fit ?
1. no tooling is required
2. dont touch terminals
3. use bonding strap
A seven segment display is used to?
1. display octal and decimal numbers only
2. display octal and binary numbers only
3. display alpha-numeric characters
What are the advantages of an LCD display over an LED ?
1. There are no advantages
2. It is brighter
3. It uses less current
An LCD display?
1. is monochrome
2. has three colours only
3. has infinite colours
To display a circle on a CRT you use?
1. 2 sine waves 90 degrees out of phase
2. 2 sine waves 180 degrees out of phase
3. 2 square wave 90 degrees out of phase
An LED display is?
1. high definition
2. red and green
3. monochrome only
Magnetic deflection in a CRT is achieved by?
1. a sawtooth waveform
2. a trapezoidal waveform
3. a sinusoidal voltage
When using a TDR (time delay reflectometer) the loss value of the cable is ?
1. shown by the curve on the screen
2. set on the TDR
3. allowed for in the calculation
Fibreoptic systems can transmit data in?
1. in two directions
2. one direction only
3. both directions at the same time
A fibreoptic data bus?
1. can transmit several messages simultaneously
2. is only used for non essential messages
3. can only transmit 1 message at a time
Light travels along a fibre optic by?
1. refraction
2. dispersion
3. reflection
An 8 data input multiplexer has how many Data Select lines ?
1. 2
2. 3
3. 8
A 12 bit 16 Channel encoder will use a multiplexer with?
1. 3 bit parallel address line
2. 2 wire series address line
3. 4 bit parallel address line
The pins on an op amp are numbered ?
1. anticlockwise
2. clockwise
3. cross ways
Data is converted from serial to parallel and parallel to serial by ?
1. a synchronous counter
2. a parallel register
3. a shift register
An encoder changes ?
1. analogue to digital
2. data from one format to another
3. digital to analogue
On an IC, pin 1 is to the left of the notch. Which way are the pins numbered ?
1. Anticlockwise
2. Clockwise
3. Left to right
An ARINC 629 bus cable is a twisted pair of wires with ?
1. a 130 ohm resistor at both ends
2. a 130 ohm resistor at one end
3. a 230 ohm resistor at one end
The ARINC 429 low rate of transmission is?
1. 100 kbits/second with high of 12-14 Mbits/second
2. 12-14 Mbits/second with high of 100 Mbits/secon
3. 12-14 Kbits/second with high of 100 kBits/second
What system uses base 8?
1. ARINC 629
2. ARINC 429, in dataword labels only
3. ARINC 573
An ARINC 429 system uses a ?
1. 16 bit word over a twisted pair of wires
2. 20 bit word over a bi-directional bus
3. 32 bit word over a twisted pair of wires