DGCA Air Navigation: EFIS & Electronic Instrumentation Questions
123 exam-style EFIS & Electronic Instrumentation questions for the DGCA Air Navigation paper (CPL · ATPL · PPL). The first 12 are free below with answers and explanations — sign up free to practise all of them with progress tracking.
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Q1
Under JAR-25 colour code rules, features displayed in red on an Electronic Flight Instrument System (EFIS), indicate:
- A warnings, flight envelope and system limits
- B flight envelope and system limits, engaged modes
- C warnings, cautions and abnormal sources
- D cautions and abnormal sources, engaged modes
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Correct answer: A. warnings, flight envelope and system limits
Under JAR-25 EFIS colour convention, red is reserved for warnings and for flight-envelope and system limits that demand immediate attention. Cautions and abnormal conditions are shown in amber, not red.
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Q2
Under JAR-25 colour code rules, features displayed in amber/yellow on an Electronic Flight Instrument System (EFIS), indicate:
- A cautions, abnormal sources
- B flight envelope and system limits
- C warnings
- D engaged modes
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Correct answer: A. cautions, abnormal sources
Under JAR-25 EFIS colour rules, amber or yellow is used to display cautions and abnormal sources that require awareness but not immediate action. Warnings and hard limits are shown in red, not amber.
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Q3
Under JAR-25 colour code rules, features displayed in green on an Electronic Flight
- A 139° - 35 NM
- B 129° - 46 NM
- C 132° - 36 NM
- D 212° - 26 NM
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Correct answer: A. 139° - 35 NM
Solving the track and distance between the two charted positions gives a course of about 139 degrees and a range of about 35 NM. The northward-and-eastward geometry of the fixes produces this short southeasterly leg.
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Q4
Refer to appendix A. Which display shows the expanded ILS mode?
- A A
- B B
- C D
- D E
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Correct answer: C. D
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Q5
Refer to appendix A. Which mode is display C?
- A Centre map
- B Map
- C Plan
- D Expanded nav
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Correct answer: B. Map
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Q6
Refer to appendix A. Which mode is display A?
- A full ILS
- B full VOR
- C full nav
- D full map
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Correct answer: C. full nav
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Q7
On display E, what is the approximate deviation from the required track?
- A 3 nm
- B 8°
- C 3°
- D 1.5°
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Correct answer: B. 8°
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Q8
On display A, what is the aircraft's track?
- A 130°
- B 165°
- C 146°
- D 135°
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Correct answer: D. 135°
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Q9
The EASA CS25 colour code for ILS deviation pointer is:
- A magenta
- B cyan
- C green
- D amber
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Correct answer: A. magenta
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Q10
The EASA CS-25 colour code for selected heading is:
- A green
- B magenta
- C amber
- D white
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Correct answer: B. magenta
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Q11
The EASA CS-25 colour code for precipitation rate in excess of 50 mm/hr is:
- A yellow
- B magenta
- C green
- D cyan
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Correct answer: B. magenta
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Q12
The EASA CS-25 colour code for a downpath waypoint is:
- A white
- B magenta
- C green
- D cyan
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Correct answer: A. white
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