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100+ Free CAAS SAR-66 Module 5 Digital Techniques Practice Questions
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2026 Statistics
Key Facts: CAAS SAR-66 Module 5 Digital Techniques Exam
40 Qs
Multiple-choice questions per exam sitting.
CAAS AC 66-13 Category B1 Matrix
50 Mins
Time allowed per exam sitting.
CAAS AC 66-13 Category B1
75%
Minimum passing score per SAR-66 module.
CAAS SAR-66 Appendix 1
S$87.20
Exam fee per basic knowledge subject (ANO 12th Sched. 2026).
CAAS Air Navigation Order
11 Topics
EFIS to HIRF/Electromagnetic Environment syllabus range.
CAAS SAR-66 Module 5 Syllabus
CAAS SAR-66 Module 5 is a 50-minute exam featuring 40 multiple-choice questions, requiring a 75% pass mark for CAAS Aircraft Maintenance Engineer (Category B1/B2) licensing in Singapore.
Sample CAAS SAR-66 Module 5 Digital Techniques Practice Questions
Try these sample questions to test your CAAS SAR-66 Module 5 Digital Techniques exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Which primary flight parameter is displayed on the upper section of a standard Electronic Flight Instrument System (EFIS) Primary Flight Display (PFD)?
A.Aircraft attitude (pitch and roll)
B.Engine pressure ratio (EPR)
C.VOR radial bearing indicator
D.Hydraulic system quantity
Explanation: The Primary Flight Display (PFD) central area prominently features the Attitude Indicator (AI) showing pitch and roll. Surrounding airspeed, altitude, heading, and vertical speed tapes provide complete flight attitude situational awareness.
2In a modern Electronic Flight Instrument System (EFIS) architecture, what is the primary function of the Symbol Generator (SG) or Display Electronic Unit (DEU)?
A.Receives analog and digital sensor inputs, processes graphics algorithms, and drives display raster and stroke signals
B.Directly measures pitot-static pressure to generate analog airspeed voltages
C.Supplies 115 V AC 400 Hz electrical power to the cockpit display CRTs
D.Stores long-term flight history logs for engine maintenance diagnostics
Explanation: The Symbol Generator (SG) acts as the display processing computer. It collects data from air data computers, inertial reference units, and flight control computers, computes display graphics symbology, and formats video signals for the display units.
3Legacy Cathode Ray Tube (CRT) EFIS displays often utilize a hybrid beam deflection technique combining stroke writing and raster scanning. How are these two methods applied?
A.Stroke writing for high-resolution vector symbols (lines and text) and raster scanning for background color shading (weather radar and attitude sky/ground)
B.Stroke writing for background weather radar maps and raster scanning for altimeter text numerals
C.Stroke writing for television video camera inputs and raster scanning for instrument warning annunciators
D.Raster scanning for pitch scale tick marks and stroke writing for full-screen video frame refresh
Explanation: Hybrid CRT displays use raster scanning (horizontal line sweeps) to render filled color areas such as weather radar returns and attitude sphere ground/sky backgrounds. High-precision vector lines, needles, and alphanumeric text are rendered using cursive stroke writing during raster retrace intervals for maximum sharpness.
4Under Airbus Electronic Centralized Aircraft Monitor (ECAM) operational design, what content is permanently dedicated to the Upper ECAM display during normal flight?
A.Primary engine parameters (N1/EPR, EGT), total fuel quantity, flap position, and warning/caution memo messages
B.Secondary engine parameters (N2, oil pressure) and hydraulic system synoptic diagrams
C.Flight Management System flight plan route waypoints and navigation radio frequencies
D.Terrain elevation contours and weather radar precipitation intensity maps
Explanation: The Upper ECAM (Engine and Warning Display - E/WD) presents primary engine instrumentation, total fuel, slat/flap configuration, and aircraft warning/caution messages. Secondary system synoptics appear on the Lower ECAM (System Display - SD).
5In Boeing Engine Indicating and Crew Alerting System (EICAS) message hierarchy, how is an urgent operational condition requiring immediate crew action categorized and color-coded?
A.WARNING message displayed in RED text accompanied by a Master Warning light and a continuous repetitive chime or siren
B.CAUTION message displayed in AMBER text accompanied by a single chime tone
C.ADVISORY message displayed in CYAN text indented below caution messages
D.MEMO message displayed in WHITE text with no acoustic alert
Explanation: EICAS assigns WARNING status (red text) to emergency conditions requiring immediate flight crew action. Warnings activate the red Master Warning annunciator and a distinct continuous acoustic alert (siren, bell, or repetitive chime).
6Modern Active Matrix Liquid Crystal Displays (AMLCD) use Thin-Film Transistors (TFT) at each pixel sub-element. What is the fundamental operational advantage of an active matrix over a passive matrix LCD?
A.Each pixel maintains its voltage charge independently throughout the refresh cycle, providing high contrast, fast response, and wide viewing angles
B.Active matrix displays eliminate the need for an external fluorescent or LED backlight unit
C.Active matrix pixels generate polarized light directly without requiring polarising filters
D.Active matrix LCD screens operate without any semiconductor driver integrated circuits
Explanation: In an AMLCD, each sub-pixel features a dedicated TFT switch and storage capacitor that holds the alignment voltage constant between scan cycles. This prevents cross-talk, eliminates flicker, increases contrast, speeds up response times, and enables wide off-axis viewing angles suitable for cockpit installations.
7What optical feature allows a Head-Up Display (HUD) to project flight symbology focused at infinity, allowing the pilot to view instruments and external runway environment simultaneously without re-focusing?
A.Collimating optics system (lens or spherical combiner mirror)
B.Biconcave polarizing beam splitter glass
C.High-magnification fresnel projection screen
D.Variable focal length mechanical zoom lens
Explanation: The HUD optical combiner incorporates collimating lenses or spherical reflective optics that bend light rays from the symbol generator CRT/digital projector so they emerge parallel (collimated). This projects the virtual image focused at optical infinity.
8If the commander's Primary Flight Display (PFD) screen suffers a complete hardware screen failure, how can the flight crew maintain display capability via reversionary switching?
A.Using the Display Transfer Switch to transfer PFD symbology onto the adjacent Navigation Display (ND) screen
B.Relying solely on standby magnetic compass and mechanical altimeter for the remainder of the flight
C.Connecting a portable laptop directly into the Symbol Generator test bus
D.Overclocking the display power supply to force the screen to turn back on
Explanation: EFIS cockpits feature Reversionary/Display Switching controls. Selecting PFD/ND transfer reroutes the PFD graphics output from the failed display unit onto the adjacent Navigation Display (ND) CRT/LCD screen.
9How does an aircraft Master Warning system prevent acoustic alert clutter during critical flight phases such as takeoff roll between 80 knots and lift-off?
A.By implementing Takeoff Inhibits in the Warning Computer to suppress non-critical cautions and warnings until reaching safe altitude
B.By completely disconnecting 28 V DC power to all cockpit warning light filaments
C.By routing all audio alarms to the passenger cabin speaker network
D.By switching off the aircraft Air Data Computers automatically
Explanation: EICAS and ECAM systems incorporate Flight Phase Flight Inhibit logic (e.g., Takeoff Inhibit). Non-critical warnings and caution chimes are suppressed during high-workload takeoff runs (e.g., above 80 kts up to 400 ft AGL) so pilots can focus on engine thrust and abort decisions without unnecessary distraction.
10Convert the 8-bit unsigned binary number 11010110_2 to its equivalent decimal (base-10) value.
A.214
B.182
C.230
D.198
Explanation: Evaluating binary positional weights: 1×128 + 1×64 + 0×32 + 1×16 + 0×8 + 1×4 + 1×2 + 0×1 = 128 + 64 + 16 + 4 + 2 = 214_10.
About the CAAS SAR-66 Module 5 Digital Techniques Practice Questions
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