Module 05.

Digital Techniques
05.01. Electronic Instrument Systems.

Question Number. 1. What are the basic elements for 'Classic T' format?.
Option A. Direction, altitude and height.
Option B. Airspeed, pitch and roll.
Option C. Airspeed, attitude, altitude and direction.
Correct Answer is. Airspeed, attitude, altitude and direction.

Question Number. 2. Typical displays on an EHSI are.

Option A. Engine indications.
Option B. VOR, Map, Plan and weather radar.
Option C. VOR, Plan, Map and Attitude.
Correct Answer is. VOR, Map, Plan and weather radar.

Question Number. 3. An EADI display showing a moving runway moves down during
the final stages of an approach. The aircraft must.
Option A. fly down.
Option B. fly up.
Option C. hold descent path.
Correct Answer is. fly down.

Question Number. 4. During an instrument approach, the glideslope pointer eflects

below the glideslope centre mark. This means the aircraft is positioned.
Option A. above the glideslope.
Option B. below the glideslope.
Option C. to the left of the localiser.
Correct Answer is. above the glideslope.

Question Number. 5. Engine parameters are displayed on.

Option A. ECAM.
Option B. EHSI.
Option C. FMSCDU.
Correct Answer is. ECAM.

Question Number. 6. What is the fixed feature of an ADI?.

Option A. The glideslope pointer.
Option B. The aircraft symbol.
Option C. The lateral deviation bar.
Correct Answer is. The aircraft symbol.

Question Number. 7. On an EADI, the Flight Director command bars

show.
Option A. the path with respect to the horizon.
Option B. the required path with respect to the actual path.
Option C. the actual path with respect to the required path.
Correct Answer is. the required path with respect to the actual path.
Question Number. 8. What instrument includes a display of a rising
runway?.
Option A. ECAM.
Option B. EHSI.
Option C. EADI.
Correct Answer is. EADI.

Question Number. 9. What functions are available on the EHSI?.

Option A. Full arc and Wx only.
Option B. Full arc, Wx and Map Mode.
Option C. Full Arc only.
Correct Answer is. Full arc, Wx and Map Mode.

Question Number. 10. With radio coupled autopilot, what are the inputs?.
Option A. ADF and VOR.
Option B. ILS and VOR.
Option C. ADF and ILS.
Correct Answer is. ILS and VOR.

Question Number. 11. An EADI display of flight director commands are

coloured.
Option A. cyan.
Option B. magenta.
Option C. red.
Correct Answer is. magenta.

Question Number. 12. EFIS systems have two control panels, their purpose
is.
Option A. one to control the type of EFIS display and the other to select the source of the
information being displayed.
Option B. one for the EADI display and one for the EHSI display.
Option C. to provide display control by one control panel whilst the other provides a
standby.
Correct Answer is. one to control the type of EFIS display and the other to select the
source of the information being displayed.

Question Number. 13. What would you expect to see displayed on an EADI
display?.
Option A. Compass heading, selected heading and VOR.
Option B. Course information, weather radar, way point alert and bearing pointers.
Option C. Flight director command bars, slip indicator, rate to altitude & autoland.
Correct Answer is. Flight director command bars, slip indicator, rate to altitude &
autoland.

Question Number. 14. An EFIS ADI display will show along with pitch and roll.
Option A. flight director bars, autoland, compass rose, altitude.
Option B. decision height, autoland, rad alt , altitude.
Option C. flight director bars, autoland, altitude, range to altitude, decision height.
Correct Answer is. decision height, autoland, rad alt , altitude.
Question Number. 15. If the glideslope pointer is below the centre mark the aircraft
is.
Option A. below the glideslope.
Option B. on the glideslope.
Option C. above the glideslope.
Correct Answer is. above the glideslope.

Question Number. 16. On an EFIS system the weather radar is displayed

on.
Option A. the FMC CDU.
Option B. the EADI.
Option C. the EHSI.
Correct Answer is. the EHSI.

Question Number. 17. EADI displays show.

Option A. pitch, roll and waypoints.
Option B. pitch and roll attitudes.
Option C. heading and weather radar.
Correct Answer is. pitch and roll attitudes.

Question Number. 18. On an EHSI in weather radar mode, a severe storm would be
shown as.
Option A. orange areas with black or yellow surrounds.
Option B. red areas with black surrounds
Option C. blue areas with white background.
Correct Answer is. red areas with black surrounds.

Question Number. 19. During flight (non fault conditions) the EICAS system displays on
the lower CRT.
Option A. flight phase page.
Option B. secondary engine parameters.
Option C. synoptic display.
Correct Answer is. secondary engine parameters.

Question Number. 20. Radio altitude is displayed on an EFIS system.

Option A. on the Electronic Horizontal Situation Indicator.
Option B. on the Electronic Attitude Direction Indicator.
Option C. on the RMI.
Correct Answer is. on the Electronic Attitude Direction Indicator.

Question Number. 21. An EFIS system ADI displays pitch, roll.

Option A. autoland, altitude, compass rose and flight director bars.
Option B. autoland, decision height, range to altitude and flight director bars and slip
indicator.
Option C. autoland, rad alt, decision height and slip indicator.
Correct Answer is. autoland, decision height, range to altitude and flight director bars and
slip indicator.

Question Number. 22. An electronic flight instrument display consists of.

Option A. Mode control panel, Raster and Stroke generator display, microprocessor and
Data inputs.
Option B. ADC, Altimeter, VSI and ASI.
Option C. ADI, HSI and Symbol generator.
Correct Answer is. Mode control panel, Raster and Stroke generator display,
microprocessor and Data inputs.

Question Number. 23. The EFIS system consists of.

Option A. EHSI, Mode control panel, EADI.
Option B. EADI, EHSI, Symbol generators.
Option C. Mode control Panel, RDMI, EHSI.
Correct Answer is. EADI, EHSI, Symbol generators.

Question Number. 24. ILS indications on PFD/ND are shown in.

Option A. cyan.
Option B. magenta.
Option C. green.
Correct Answer is. magenta.

Question Number. 25. A weather radar image can be displayed on the ND on all modes
except.
Option A. arc.
Option B. nav rose.
Option C. plan.
Correct Answer is. plan.

Question Number. 26. In a typical commercial aircraft Head Up Guidance

System.
Option A. the type of information shown on the attitude director indicator is displayed on
a transparent plate.
Option B. all instrument information is displayed on the windshield.
Option C. only emergency indications or warnings are displayed to the pilot.
Correct Answer is. the type of information shown on the attitude director indicator is
displayed on a transparent plate.

Question Number. 27. A modern Electronic Horizontal Situation Indicator will display
the following:.
Option A. Waypoints, ILS Steering Information, Distance to go and Magnetic Heading.
Option B. ILS Steering Information, Flight director information and Glide Slope Deviation.
Option C. Ground speed, Magnetic Heading, Way points and Localiser.
Correct Answer is. Waypoints, ILS Steering Information, Distance to go and Magnetic
Heading.

Question Number. 28. Cockpit panels have a matt colour finish. The purpose
is.
Option A. so that pilots feel more comfortable during daytime.
Option B. so that the amount of glare is reduced to minimum.
Option C. so that dust and dirt are less evident on panels.
Correct Answer is. so that the amount of glare is reduced to minimum.

Question Number. 29. A complete EFIS installation in an aircraft is made up

of.
Option A. either of the above.
Option B. right (captain) and left (co-pilot).
Option C. left (captain) and right (co-pilot).
Correct Answer is. either of the above.
Question Number. 30. On a modern 'glass cockpit' aircraft, engine information will be
displayed on.
Option A. FMS.
Option B. EFIS.
Option C. ECAM.
Correct Answer is. ECAM.

Question Number. 31. What does EFIS mean?.

Option A. Electronic Fire Indication Signal.
Option B. Electronic Flight Instrument System.
Option C. Electronic Flight Information System.
Correct Answer is. Electronic Flight Instrument System.

Question Number. 32. What does EICAS mean?.

Option A. Electronic indicator and control alerting system.
Option B. Engine indicating and Crew alerting system.
Option C. Electronic indicator and crew alerting system.
Correct Answer is. Engine indicating and Crew alerting system.

Question Number. 33. What does ECAM mean?.

Option A. Engine Centralised Aircraft Management System.
Option B. Engine Centralised Aircraft Monitoring System.
Option C. Electronic Centralised Aircraft Monitoring System.
Correct Answer is. Electronic Centralised Aircraft Monitoring System.

Question Number. 1. In a computer memory device, which one of these has the
slowest access time?.
Option A. floppy disk.
Option B. magnetic tape.
Option C. 8mm video tape.
Correct Answer is. magnetic tape..

Question Number. 2. The advantage of DRAM over SRAM is.

Option A. are cheaper to manufacture.
Option B. has a larger storage capacity per chip area.
Option C. they operate slower.
Correct Answer is. has a larger storage capacity per chip area.

Question Number. 3. A BYTE is usually.

Option A. an 8 bit word.
Option B. a six bit word.
Option C. a 12 bit word.
Correct Answer is. an 8 bit word.

Question Number. 4. What is the definition of baud rate?.

Option A. 1 word per second.
Option B. 1 byte per second.
Option C. 1 bit per second.
Correct Answer is. 1 bit per second.
Question Number. 5. Which would have the least components?.
Option A. ALU.
Option B. CPU.
Option C. LSI.
Correct Answer is. ALU.

Question Number. 6. What is a baud?.

Option A. A bit of data.
Option B. A block of data.
Option C. A byte of data.
Correct Answer is. A bit of data.

Question Number. 7. In a bi-stable memory circuit.

Option A. the memory is retained indefinably.
Option B. the memory is lost as soon as power is removed.
Option C. the memory needs to be refreshed constantly, even when power is on.
Correct Answer is. the memory is lost as soon as power is removed.

Question Number. 8. What is the advantage of series over parallel message

sending?.
Option A. Only one pair of conductors.
Option B. More information sent.
Option C. Quicker.
Correct Answer is. Only one pair of conductors.

Question Number. 9. A typical example of a mass storage memory device which is

also WORM (Write Once Read Many) is.
Option A. an IC.
Option B. a magnetic tape.
Option C. a CD Rom.
Correct Answer is. a CD Rom.

Question Number. 10. A computer using RAM would utilize.

Option A. magnetic tape.
Option B. a compact disc.
Option C. an integrated circuit (chip).
Correct Answer is. an integrated circuit (chip).

Question Number. 11. Magnetic materials are used in.

Option A. ROMs only.
Option B. some RAMs.
Option C. EPROM.
Correct Answer is. some RAMs.

Question Number. 12. A typical example of a mass storage device is.

Option A. IC.
Option B. magnetic tape.
Option C. CD.
Correct Answer is. CD.
Question Number. 13. What is EPROM?.
Option A. Enhanced programmable read only memory.
Option B. Erasable programmable read only memory.
Option C. Erasable programming read only module.
Correct Answer is. Erasable programmable read only memory.

Question Number. 14. How many bytes can be carried in a 32bit word?.
Option A. 8 bytes.
Option B. 4 bytes.
Option C. 2 bytes.
Correct Answer is. 4 bytes.

Question Number. 15. A common used material in computer manufacturing

is.
Option A. ferrite material.
Option B. permeamag material.
Option C. ferromagnetic material.
Correct Answer is. ferromagnetic material.

Question Number. 16. Ferrite medium is used for computer memory

because.
Option A. data is stored after the power is removed.
Option B. it is light.
Option C. it has low eddy current losses.
Correct Answer is. data is stored after the power is removed.

Question Number. 17. Data is usually stored in.

Option A. RAM.
Option B. ROM.
Option C. EEPROM.
Correct Answer is. ROM.

05.12. Electrostatic Sensitive Devices.

Question Number. 1. ESDS bags are sealed by.

Option A. ESDS labels.
Option B. zip locks.
Option C. twine (100% cotton).
Correct Answer is. twine (100% cotton).

Question Number. 2. What precautions are required when removing ESDS

equipment?.
Option A. Wear a wrist strap connected to an approved ground point.
Option B. No special precautions are required.
Option C. Keep one hand on the airframe.
Correct Answer is. Wear a wrist strap connected to an approved ground point.

Question Number. 3. A flight deck CRT LRU is being replaced. What does the ESDS
label indicate?.
Option A. Wrist straps should be worn.
Option B. Do not touch plug pins or leave them exposed.
Option C. Remove power before connecting.
Correct Answer is. Do not touch plug pins or leave them exposed.
Question Number. 4. During an EFIS screen fit.
Option A. dont touch terminals.
Option B. no tooling is required.
Option C. use bonding strap.
Correct Answer is. dont touch terminals.

Question Number. 5. With a relative humidity of 10% to 20%, if you walked over a
carpet what electrostatic voltage value would you expect to see?.
Option A. 35,000 volts.
Option B. 6,000 volts.
Option C. 12,000 volts.
Correct Answer is. 35,000 volts.

Question Number. 6. Before fitting a Printed Circuit Board you should check
the.
Option A. resistance between skin and strap end plug is less than 10 megohms.
Option B. resistance between skin and strap end plug is more than 1 megohms.
Option C. resistance between strap and strap end plug is less than 1 megohms.
Correct Answer is. resistance between strap and strap end plug is less than 1
megohms.

Question Number. 7. The resistance of the wrist strap used as part of anti static
precautions should be.
Option A. 0 - 200 ohm.
Option B. 20 megohm - 200 megohm.
Option C. 250 kilohm - 1.5 megohm.
Correct Answer is. 250 kilohm - 1.5 megohm.

Question Number. 8. When handling PCB's labelled ESDS, what precaution are
taken?.
Option A. Do not touch its pins as copper contamination can occur.
Option B. Isolate electrical power before installing on Aircraft.
Option C. First earth with aircraft then to it.
Correct Answer is. Isolate electrical power before installing on Aircraft.

Question Number. 9. After attaching a wrist strap to your wrist (which is connected
to aircraft ground), prior to removal of ESDS equipment, the resistance
measured.
Option A. between your skin and the pin ground must be >1 megohms.
Option B. between the strap and the pin ground must be <1 megohms.
Option C. between the strap and the pin ground must be >1 Megohms.
Correct Answer is. between the strap and the pin ground must be >1 Megohms.

Question Number. 10. Which of the following ESDS devices can withstand higher
static electricity voltage?.
Option A. MOSFET.
Option B. SCR.
Option C. ECL.
Correct Answer is. SCR.

Question Number. 11. A wrist band must be worn when working with ESDS
devices.
Option A. to dissipate and prevent static build-up on the operator.
Option B. to prevent the operator from getting an electric shock.
Option C. to dissipate static charge on the device.
Correct Answer is. to dissipate and prevent static build-up on the operator.

Question Number. 12. A humid atmosphere.

Option A. reduces static charge.
Option B. eliminates static charge.
Option C. has no effect on the level of charge.
Correct Answer is. reduces static charge.

Question Number. 13. Electrostatic discharge occurs when.

Option A. the ground lead on a wrist strap touches the skin.
Option B. materials are rubbed together or pulled apart.
Option C. materials of different potential are brought in close proximity to each
other.
Correct Answer is. materials of different potential are brought in close proximity to each
other.

Question Number. 14. Before removing an assembly from an aircraft, with regards to
HIRF, you must first ensure that there is minimum current flow between.
Option A. the assembly and the aircraft.
Option B. you and the assembly.
Option C. you and the aircraft.
Correct Answer is. you and the assembly.

Question Number. 15. When removing a PC card from an ESDS assembly ensure a low
current path between.
Option A. aircraft and ground.
Option B. you and the assembly.
Option C. you and the aircraft.
Correct Answer is. you and the aircraft.