100+ Free NCAA Flight Engineer Licence Practice Questions

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2026 Statistics

Key Facts: NCAA Flight Engineer Licence Exam

60 Q

Exam Questions

NCAA FE Syllabus

120 Min

Exam Duration

NCAA FE Syllabus

75%

Passing Score

Nig. CARs Part 2

₦50,000

Exam Fee

NCAA Official Schedule of Fees

NCAA Flight Engineer is a 60-question, 120-minute certification exam administered by NCAA under Nig. CARs Part 2 requiring a 75% passing grade.

Sample NCAA Flight Engineer Licence Practice Questions

Try these sample questions to test your NCAA Flight Engineer Licence exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In a transport category aircraft hydraulic system operating at 3,000 psi nominal pressure, an actuator piston has an effective surface area of 5.0 square inches. If fluid line resistance causes a 150 psi pressure drop at the actuator inlet, what is the net linear force exerted by the piston?

A.14,250 lbs

B.15,000 lbs

C.13,500 lbs

D.15,750 lbs

Explanation: Net linear force F = Net Pressure x Area. Net Pressure = 3,000 psi - 150 psi = 2,850 psi. Force F = 2,850 psi x 5.0 sq in = 14,250 lbs.

2Why are hydraulic fluid reservoirs in high-altitude transport aircraft pressurized with engine bleed air or regulated nitrogen?

A.To prevent hydraulic pump cavitation at high altitudes and maintain positive fluid head pressure

B.To increase fluid viscosity during cold-weather operations

C.To cool the hydraulic fluid before it enters the return lines

D.To drive the hydraulic actuators directly without pump pressure

Explanation: Pressurizing the hydraulic reservoir maintains positive fluid head pressure at the pump inlet, preventing fluid foaming and pump cavitation caused by low ambient atmospheric pressure at high altitudes.

3What is the primary function of a nitrogen pre-charged accumulator in a high-pressure aircraft hydraulic system?

A.To damp system pressure surges, supplement pump flow during peak demand, and store emergency pressure

B.To filter out microscopic metallic debris before fluid reaches flight control actuators

C.To convert direct current electrical power into mechanical fluid displacement

D.To cool returning hydraulic fluid prior to entering the main system reservoir

Explanation: Hydraulic accumulators store hydraulic energy under compressed nitrogen pre-charge to absorb hydraulic shocks/surges, supplement engine-driven pumps during rapid actuator demand, and provide emergency actuation power.

4During normal low-thrust engine operation (idle or descent), from which stage of a multi-stage turbofan compressor is pneumatic bleed air primarily extracted?

A.High-Pressure (HP) compressor stage

B.Low-Pressure (LP) fan stage

C.Diffuser exit section only

D.Turbine exhaust nozzle

Explanation: At low engine RPM or thrust settings, Intermediate-Pressure (IP) bleed air is insufficient to power ECS and anti-ice systems, so the high-pressure bleed valve opens to extract air from the High-Pressure (HP) compressor stage.

5What mechanical device inside an Integrated Drive Generator (IDG) maintains a constant generator rotor speed of 12,000 RPM despite varying engine N2 RPM?

A.Constant Speed Drive (CSD) hydro-mechanical governor

B.Centrifugal clutch coupler

C.Variable pitch fan pulley

D.Electronic torque converter switch

Explanation: The Constant Speed Drive (CSD) uses a differential hydraulic pump and motor combination governed to automatically speed up or slow down input shaft rotation, ensuring the AC generator turns at a constant RPM (typically 12,000 RPM) to deliver 400 Hz power.

6What is the primary operational role of a Transformer Rectifier Unit (TRU) in an aircraft electrical system?

A.To step down 115V AC power and convert it into 28V DC power

B.To convert 28V DC battery power into 115V 400Hz AC power

C.To step up 28V DC power to high-voltage AC for spark igniters

D.To regulate generator frequency during engine speed fluctuations

Explanation: A TRU contains a step-down transformer and solid-state diode rectifiers to transform 115V AC from the main AC buses into 28V DC to power DC flight instruments and charge batteries.

7What is the standard alternating current (AC) frequency used in transport category aircraft electrical power distribution systems?

A.400 Hz

B.50 Hz

C.60 Hz

D.1,000 Hz

Explanation: Aircraft standard AC power is 400 Hz (3-phase, 115/200V). Using 400 Hz allows transformers and magnetic components to be vastly smaller and lighter than ground-based 50/60 Hz components.

8How does an increase in ambient fuel temperature affect the density and volumetric measurement of Jet A-1 fuel?

A.Fuel density decreases; volume expands for a given mass of fuel

B.Fuel density increases; volume contracts for a given mass of fuel

C.Fuel density remains constant while volume decreases

D.Both fuel density and fuel volume increase simultaneously

Explanation: Liquid Jet A-1 expands when heated. Thus, as fuel temperature increases, its density (kg/L or lbs/gal) decreases, meaning a given mass of fuel occupies a larger volume.

9What is the main operational purpose of an engine fuel cross-feed valve?

A.To allow any engine to draw fuel from any fuel tank, enabling lateral fuel balancing

B.To jettison excess fuel overboard during emergency landings

C.To automatically pump fuel into the auxiliary power unit (APU) during start

D.To filter out suspended water droplets before fuel enters the engine fuel control unit

Explanation: Fuel cross-feed valves connect left, right, and center fuel manifolds, permitting engines to feed from opposite tanks to correct lateral fuel imbalances or feed engines from a single tank.

10In a high-bypass turbofan engine, how is Engine Pressure Ratio (EPR) calculated?

A.Total turbine discharge pressure (P7 or P5) divided by total compressor inlet pressure (P2)

B.Compressor exit pressure (P3) divided by ambient static pressure (P0)

C.Combustion chamber pressure (P4) divided by turbine exit pressure (P5)

D.Fan discharge pressure (P1.5) divided by ambient static pressure (P0)

Explanation: EPR is the ratio of total pressure leaving the turbine section (Pt7 or Pt5) to total pressure entering the compressor/fan section (Pt2). It is a primary measure of thrust generated by the engine.

About the NCAA Flight Engineer Licence Exam

The NCAA Flight Engineer Licence Examination evaluates theoretical knowledge required for flight engineers operating multi-engine transport category aircraft in Nigeria under Nig. CARs Part 2 and Part 8. Content covers large aircraft systems (hydraulic, pneumatic, electrical AC/DC, fuel management), turboprop/turbofan engine mechanics, environmental control & pressurization, fire detection/suppression, engineering load calculations, and regulatory compliance.

Assessment

60 MCQs administered via computer testing system. 75% minimum passing mark.

Time Limit

120 minutes

Passing Score

75%

Exam Fee

₦20,000 (Nigeria Civil Aviation Authority (NCAA))

NCAA Flight Engineer Licence Exam Content Outline

20%

Large Aircraft Hydraulics & Pneumatics

High-pressure hydraulic systems, accumulators, pumps, actuators, fluid contamination, pneumatic bleed air extraction, pressure regulation, and anti-ice pneumatic supply.

20%

Electrical Generation & Distribution

3-phase 115/200V 400Hz AC generation, IDGs, CSDs, TRUs, essential vs main buses, load shedding, electrical power math (kVA, kW, power factor), and battery backup.

20%

Turboprop & Turbofan Powerplants

Gas turbine principles, EPR, N1/N2/N3 spool speeds, ITT/EGT limits, compressor stall recovery, FADEC logic, APU operation, and turboprop propeller governors.

15%

Fuel Management, Cross-Feed & Performance Monitoring

Fuel tank sequencing, cross-feed valve operations, jettison systems, fuel density temperature corrections, specific fuel consumption (SFC), and worked fuel burn calculations.

15%

Cabin Pressurization & Environmental Systems

Air cycle machines (ACM), cooling packs, outflow valve control, cabin altitude, differential pressure limits, rate-of-climb/descent controllers, and rapid depressurization.

10%

Fire Protection, Emergency Checklists & Nig. CARs

Continuous loop fire detection, fire bottle squib actuation, cargo bay suppression, emergency checklist execution, crew resource management, and Nig. CARs Part 2 FE licensing rules.

How to Pass the NCAA Flight Engineer Licence Exam

What You Need to Know

Passing score: 75%
Assessment: 60 MCQs administered via computer testing system. 75% minimum passing mark.
Time limit: 120 minutes
Exam fee: ₦20,000

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

NCAA Flight Engineer Licence Study Tips from Top Performers

1Master electrical load calculations for 3-phase AC systems and TRU conversion efficiency.

2Understand hydraulic pressure drop formulas (Force = Pressure x Area) and accumulator pre-charge checks.

3Memorize Nig. CARs Part 2 flight engineer recency requirements (e.g. 50 hours flight time as FE in preceding 12 months).

4Study fuel cross-feed procedures and weight-and-balance CG movement caused by fuel burn sequence.

Frequently Asked Questions

What is the passing score for the NCAA Flight Engineer exam?

Candidates must achieve a score of at least 75% to pass the NCAA Flight Engineer theoretical exam.

How long is the exam and how many questions are included?

The exam consists of 60 multiple-choice questions with a total time limit of 120 minutes.

What medical certificate is required for an NCAA Flight Engineer Licence?

Under Nig. CARs Part 2, candidates must hold a valid Class 1 Medical Certificate.

Are engineering calculations required on the exam?

Yes. Candidates are tested on worked calculations including fuel burn rates, electrical generator loads (kVA/kW), hydraulic force/pressure drops, and cabin pressurization differential.

100+ Free NCAA Flight Engineer Licence Practice Questions

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