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DGCA Technical General · 24 questions

EFIS: DGCA Technical General Questions and Answers

24 practice questions on EFIS with answers and explanations, plus the key concepts and formulas, from the TrueHeading question bank.

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About this topic

Use this page to revise EFIS for the DGCA Technical General paper. Below are the key ideas first, then 10 practice questions with answers and explanations, picked from the 24 questions in the TrueHeading bank for this topic.

In short: Standard colours:

Open the full set in the student zone to answer every question, track your accuracy and take timed mock tests.

Key concepts: EFIS

3 ideas to know cold.

EFIS colour conventions?

Standard colours:

  • Green: engaged modes and active information
  • White: scales and present values
  • Magenta: FMS flight plan and targets
  • Cyan: selected values and bugs
  • Amber: caution · Red: warning

Parts of EFIS?

PFD: primary flight display. ND: navigation display.

  • ND modes: ROSE, ARC, MAP, PLAN
  • Symbol generators drive the displays
  • Reversion lets one display take over

What are the display units of an EFIS?

PFD (primary flight display) and ND (navigation display), with an EICAS/ECAM engine display.

  • ND modes: ROSE, ARC, MAP, PLAN
  • Colour coding: magenta = FMS path, green = active, cyan = selected

Practice questions: EFIS

Tap “Show answer” after you have tried each one.

Q1The EFIS primary flight display (PFD) shows:

  1. attitude, airspeed, altitude, vertical speed and heading
  2. fuel and electrical systems
  3. weather radar only
  4. engine parameters only
Show answer

Answer: A. attitude, airspeed, altitude, vertical speed and heading

The primary flight instruments on one screen.

Q2The navigation display (ND) shows:

  1. pressurisation data
  2. the route, map, weather radar and navigation data
  3. the electrical system
  4. engine data
Show answer

Answer: B. the route, map, weather radar and navigation data

Modes include ROSE, ARC, MAP and PLAN.

Q3The ND mode in which the aircraft symbol is at the centre with the compass rose around is:

  1. ROSE
  2. PLAN
  3. ARC
  4. APP
Show answer

Answer: A. ROSE

ROSE modes show a full 360° compass.

Q4The PLAN mode of the ND shows:

  1. weather only
  2. the aircraft heading up
  3. a vertical profile
  4. the route with north up, centred on the selected waypoint
Show answer

Answer: D. the route with north up, centred on the selected waypoint

It is used to check the flight plan.

Q5The symbol generator (display management computer) in EFIS:

  1. processes the data and creates the display for the screens
  2. creates fuel
  3. sends radio messages
  4. generates thrust
Show answer

Answer: A. processes the data and creates the display for the screens

It receives data from the sensors and computers.

Q6If one display unit fails, the EFIS:

  1. stops all displays
  2. shuts down the engine
  3. can display the information on another screen (reconfiguration)
  4. no longer displays attitude
Show answer

Answer: C. can display the information on another screen (reconfiguration)

Redundancy allows reconfiguration.

Q7The mode annunciator on the PFD (flight mode annunciator, FMA) shows:

  1. the fuel quantity
  2. the active and armed autopilot and autothrottle modes
  3. the engine rpm
  4. the cabin altitude
Show answer

Answer: B. the active and armed autopilot and autothrottle modes

It shows the vertical and lateral modes.

Q8A speed trend vector on the PFD shows:

  1. the past speed
  2. the predicted speed in about 10 seconds
  3. the current speed only
  4. the stall speed only
Show answer

Answer: B. the predicted speed in about 10 seconds

It helps the crew detect acceleration.

Q9The weather radar image appears on the:

  1. navigation display
  2. PFD only
  3. radio panel
  4. engine display only
Show answer

Answer: A. navigation display

It is overlaid on the map.

Q10The advantage of EFIS over electromechanical instruments is:

  1. lower cost of components
  2. greater reliability, flexibility and less maintenance
  3. no need for a power supply
  4. more moving parts
Show answer

Answer: B. greater reliability, flexibility and less maintenance

It integrates multiple sources.

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More DGCA Technical General topics

Aerodynamics & Performance181 QFlight Controls & Stability38 QAirframe & Structures25 QPowerplant79 QPropellers32 QAircraft Systems116 QPitot Statics35 QBarometric Altimeters61 QRadio Altimeters37 QVertical Speed Indicators (VSI)32 QAirspeed Indicators24 QAirspeeds41 QMach55 QGyroscope52 QAttitude Indicators20 QTurn and Slip50 QINS, IRS and FMS32 QAutoflight23 QFlight Director21 QEICAS / ECAM24 QEngine Instruments29 QTemperature Indicators34 QFuel Systems35 QCompass54 QWarning & Recording Systems33 QTCAS39 Q
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