digital technique

Which feature primarily distinguishes digital avionics from traditional analog avionics?

Binary processing of information

Which aircraft system most directly improves pilot situational awareness by integrating multiple flight parameters onto one display?

EFIS

An aircraft technician notices that one branch of a cockpit lighting circuit has failed, while the remaining lights continue operating normally. Which circuit configuration is most likely used?

Parallel

Which electronic component stores electrical energy and stabilizes voltage?

Capacitor

Which component allows current flow in only one direction?

Diode

Why are circuit diagrams preferred during troubleshooting instead of physical layouts?

They show logical signal flow and functional relationships.

A Flight Management System unexpectedly reboots whenever engine power changes. Which electrical issue should be checked first?

Voltage instability

Which condition causes current to bypass its intended load, creating overheating hazards?

Short circuit

Which protection device is reusable after correcting the fault?

Circuit breaker

Which PCB feature helps reduce electromagnetic interference?

Multi-layer construction with shielding

A technician is troubleshooting an EFIS display that suddenly loses power after a connector becomes loose due to aircraft vibration. What type of circuit condition is MOST likely present?

Open circuit

Which statement BEST explains why digital systems generally require less maintenance than analog systems?

They have fewer moving parts and include built-in diagnostics.

During PCB inspection, a mechanic discovers a cracked copper trace connecting a processor to a sensor. What is the MOST likely result?

Signal interruption between components

Which aircraft system automatically controls engine parameters such as fuel flow without continuous pilot adjustment?

FADEC

A digital display presents navigation, engine parameters, weather, and maps on one screen. Which digital system characteristic does this demonstrate?

Integrated information display

A maintenance technician is tracing the electrical path from a cockpit switch to a flight control computer using a schematic. Which advantage of circuit diagrams is being utilized?

Following signal flow

Why are multi-layer PCBs commonly used in aircraft digital computers?

They reduce electromagnetic interference and improve signal integrity.

Which inspection tool is MOST appropriate for locating insulation failure that causes a short circuit?

Megohmmeter

Which statement about a series circuit is TRUE?

One failed component interrupts the entire circuit.

An aircraft's standby attitude indicator remains operational even after the EFIS display fails. This demonstrates:

Built-in redundancy

A processor receives information from sensors, performs calculations, and commands a warning light to illuminate. Which stage represents the warning light?

Output

Which electronic component is primarily responsible for switching or amplifying electrical signals?

Transistor

A technician observes that every branch of a navigation circuit receives the same voltage but different current values. What type of circuit is this?

Parallel

Which maintenance practice is MOST important when handling aircraft PCBs?

Wearing an anti-static wrist strap

Which situation presents the GREATEST immediate safety hazard?

A short circuit causing overheating and tripping circuit breakers

Which advantage of digital avionics MOST directly reduces pilot workload?

Automated monitoring with integrated displays

Which of the following would MOST likely cause intermittent faults in a PCB?

Cold solder joints

A technician measures correct source voltage but no voltage reaches the load. What is the MOST likely fault?

Open circuit

Which component protects sensitive electronics by allowing current to flow in only one direction?

Diode

Which aircraft digital system is primarily responsible for route planning and navigation management?

FMS

Digital systems improve flight safety primarily because they:

Provide accurate real-time information and automatic alerts.

Which circuit condition is considered NORMAL for proper aircraft operation?

Closed circuit

What is the MAIN purpose of a resistor in aircraft digital circuits?

Limit current

Which aircraft instrument is intentionally retained in a glass cockpit for safety?

Standby Attitude Indicator

Which characteristic is unique to a parallel circuit?

Equal voltage across all branches

Why is voltage stability critical in aircraft digital computers?

To prevent data corruption and unexpected resets

Which device consumes electrical power to perform work in a circuit?

Load

During troubleshooting, what should ALWAYS be verified before replacing a suspected faulty component?

Power supply and grounding

Which feature allows digital systems to continue operating safely even after one subsystem fails?

Redundancy

Which statement BEST summarizes why aviation shifted from analog to digital systems?

Digital systems provide higher accuracy, reliability, automation, and easier maintenance.

Aircraft digital computer technology primarily uses:

Digital electronic systems

Digital computers process information using:

Binary digits (0 and 1)

Modern aircraft have replaced many analog gauges with:

EFIS displays

Which system displays altitude, airspeed, heading, and attitude?

EFIS

What does EFIS stand for?

Electronic Flight Instrument System

Which is NOT an advantage of digital systems?

Increased mechanical wear

Which electronic component limits current?

Resistor

Which component stores electrical energy?

Capacitor

Which component allows current to flow in only one direction?

Diode

Which electronic component acts as a switch or amplifier?

Transistor

The primary purpose of a fuse is to:

Protect against overcurrent

Which device can usually be reset after tripping?

Circuit breaker

An electronic circuit is:

A closed path for current

Which comes FIRST in a digital system?

Input

After input comes:

Processing

The final stage is called:

Output

A circuit diagram shows:

Functional electrical connections

Circuit symbols are used to:

Represent electronic components

The path that allows electricity to flow is called the:

Conductive path

Aircraft PCBs mainly use:

Copper traces

The aircraft battery is an example of a:

Voltage source

A component that consumes electrical power is called a:

Load

Switches and relays are examples of:

Control elements

Which circuit has only ONE current path?

Series

In a series circuit, current is:

The same through all components

If one component fails in a series circuit:

Entire circuit stops working

A parallel circuit has:

Multiple current paths

Voltage in a parallel circuit is:

Equal across branches

If one branch fails in a parallel circuit:

Remaining branches continue operating

An open circuit means:

Electrical path is broken

A closed circuit means:

Current flows normally

A short circuit usually results in:

Excessive current

Which condition is considered the MOST dangerous?

Short circuit

Which instrument is used as a backup in glass cockpits?

Standby Attitude Indicator

What does FADEC stand for?

Full Authority Digital Engine Control

What does FMS stand for?

Flight Management System

What does ADC stand for?

Air Data Computer

PCBs should always be handled using:

Anti-static wrist straps

The main goal of aircraft digital systems is to improve:

Safety, reliability, and efficiency