Free Practice Questions for Iran CAO CPL Theory

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Sample Iran CAO CPL Theory Practice Questions

Try these sample questions to review concepts for the Iran CAO CPL Theory exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under CAO.IRI Part-FCL and ICAO Annex 1, what is the minimum age requirement for the official issuance of a Commercial Pilot License (CPL)?

A.18 years of age

B.17 years of age

C.21 years of age

D.23 years of age

Explanation: In accordance with CAO.IRI Part-FCL (FCL.300) and ICAO Annex 1 standards, an applicant for a Commercial Pilot License must be at least 18 years of age on the date of license issuance.

2What are the core operating privileges granted to the holder of a CAO.IRI Commercial Pilot License (Aeroplanes)?

A.To exercise all privileges of a PPL, to act as pilot-in-command in commercial air transport of any single-pilot aeroplane, and to act as co-pilot in multi-pilot commercial operations

B.To act unconditionally as pilot-in-command of wide-body multi-pilot commercial airliners in scheduled passenger service

C.To conduct flight test evaluations on prototype experimental aircraft without further certification

D.To issue airworthiness review certificates on turbine multi-engine aircraft

Explanation: Under CAO.IRI Part-FCL (FCL.305), a CPL holder is privileged to exercise all PPL privileges, act as pilot-in-command (PIC) in any aeroplane engaged in commercial air transport operations certified for single-pilot operations, and act as co-pilot (First Officer) in multi-pilot operations.

3What class of aero-medical certificate is mandatory to exercise the commercial privileges of a CAO.IRI Commercial Pilot License?

A.Class 1 Medical Certificate

B.Class 2 Medical Certificate

C.Class 3 Medical Certificate

D.LAPL Medical Certificate

Explanation: Under CAO.IRI Part-MED, a valid Class 1 Medical Certificate is legally mandatory for exercising commercial pilot privileges (CPL and ATPL). A Class 2 certificate is only sufficient for private flying.

4Under CAO.IRI commercial air transport rules, what is the maximum continuous Flight Duty Period (FDP) permitted for a standard un-augmented two-pilot flight crew starting at 08:00 local time?

A.13 hours (subject to reduction based on the number of sectors flown)

B.18 hours regardless of sectors

C.8 hours maximum under all circumstances

D.16 hours without rest breaks

Explanation: Under Flight Time Limitations (FTL) based on EASA/ICAO standards adopted by CAO.IRI, the maximum basic daily FDP for an un-augmented two-pilot crew starting during optimal daytime hours (06:00-13:29) is 13 hours for 1 to 2 sectors, reducing progressively for additional sectors.

5What document grants an aviation commercial enterprise the official authority to perform commercial air transport operations in accordance with national regulations?

A.Air Operator Certificate (AOC) with associated Operations Specifications

B.Certificate of Registration issued by the aircraft manufacturer

C.Commercial Pilot Flight Instructor rating certificate

D.Airport Business Trade License issued by the municipality

Explanation: An Air Operator Certificate (AOC) issued by the civil aviation authority (CAO.IRI) certifies that the operator has the professional ability, organization, facilities, and maintenance systems to ensure safe commercial air transport operations.

6When intercepted by a military aircraft in flight, what is the mandatory squawk code and radio action required of the intercepted civil aircraft?

A.Select SSR Mode A code 7700 and attempt to establish communication with the intercepting aircraft on 121.500 MHz

B.Select code 7500 and initiate an immediate high-speed descent to sea level

C.Turn off the transponder and execute continuous 360° defensive clearing turns

D.Maintain altitude and frequency while flashing landing lights three times

Explanation: ICAO Annex 2 Appendix 2 mandates that an intercepted aircraft must immediately: squawk 7700 on Mode A (unless otherwise instructed by ATC), monitor emergency frequency 121.500 MHz, follow visual signals of the interceptor, and comply with all instructions.

7In a constant-speed propeller system, what mechanical mechanism increases blade pitch when the cockpit propeller control lever is pulled aft (lowering RPM)?

A.The governor flyweights tilt outward, raising the pilot valve to allow oil pressure to adjust the propeller piston against counterweights or spring tension

B.An electric motor in the spinner winds an internal planetary gear clockwise

C.The carburetor throttle butterfly valve closes, reducing exhaust gas pressure

D.Engine oil is completely drained from the propeller hub into the crankcase

Explanation: A propeller governor contains spinning flyweights driven by the engine. Pulling the control lever aft reduces speeder spring tension; centrifugal force causes flyweights to tilt outward (overspeed condition), moving the pilot valve to route or release oil pressure, increasing blade pitch to take a larger bite of air and slow the engine back to the set RPM.

8What is the primary operational difference between a turbocharged aircraft piston engine and a normally aspirated piston engine?

A.A turbocharged engine uses an exhaust gas turbine to compress intake air, maintaining sea-level manifold pressure up to its critical altitude

B.A turbocharged engine injects nitrous oxide into the cylinders during climb

C.A turbocharged engine requires no oil lubrication for its high-speed shaft

D.A turbocharged engine produces constant horsepower without spark plug ignition

Explanation: A turbocharger utilizes otherwise wasted exhaust gas energy to spin a turbine that drives an impeller compressor. This compresses thin ambient air, allowing the engine to maintain rated sea-level manifold pressure and horsepower up to its critical altitude.

9What safety device prevents the accidental retraction of an aircraft's retractable landing gear while the aircraft is resting on the ground?

A.A landing gear squat switch (weight-on-wheels microswitch) that mechanically or electrically interrupts the gear selector circuit

B.A pitot-static pressure sensor that locks the gear lever when airspeed is above 50 knots

C.A centrifugal clutch mounted inside the nose wheel hub

D.A thermal relief valve that vents hydraulic fluid when ambient temperature drops

Explanation: A squat switch (mechanical microswitch mounted on a landing gear oleo strut) is compressed by aircraft weight when on the ground. This breaks the electrical circuit or actuates a mechanical solenoid lock on the landing gear selector handle, preventing accidental gear retraction on the runway.

10In a pressurized aircraft cabin, what primary component actively modulates cabin air exhaust to maintain the selected cabin altitude and differential pressure?

A.The cabin outflow valve

B.The engine bleed air shutoff valve

C.The ram air ventilation scoop

D.The pitot tube heating element

Explanation: Pressurization systems operate on a continuous inflow / modulated outflow principle. Conditioned bleed air enters the cabin at a relatively constant rate, while the cabin outflow valve modulates its opening to regulate the rate of air escaping, thereby controlling cabin pressure altitude and differential pressure.

About the Iran CAO CPL Theory Exam

The Civil Aviation Organization of Iran (CAO.IRI) Commercial Pilot License (CPL) theoretical knowledge examination certifies that pilot candidates possess the advanced aeronautical knowledge required to command commercial civil flights and exercise commercial pilot privileges. Conducted in technical English in alignment with ICAO Annex 1 and Part-FCL standards, the exam tests multi-engine aerodynamics, complex systems, commercial regulations, high-altitude physiology, and advanced radio navigation. This free practice bank provides 100 comprehensive questions with detailed explanations.

Exam sponsor: Civil Aviation Organization of the Islamic Republic of Iran (CAO.IRI). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Written multiple-choice theoretical examinations administered by the Civil Aviation Organization of Iran across the 13 commercial pilot subjects listed at FCL.310 of the CAO.IRI Air Crew Regulation: Air Law, Aircraft General Knowledge (Airframe/Systems/Powerplant), Aircraft General Knowledge (Instrumentation), Mass and Balance, Performance, Flight Planning and Monitoring, Human Performance, Meteorology, General Navigation, Radio Navigation, Operational Procedures, Principles of Flight, and VFR Communications. Each paper must be passed at 70% within an 18-month window.

Time Limit

Timed per subject paper per CAO.IRI examination timetables.

Passing Score

70% on each subject paper under CAO.IRI Air Crew Regulation point FCL.025(b)(1), with a penalty of 1% of the marks for every 4 wrong answers. All papers must be passed within 18 months counted from the end of the calendar month of the first attempt, and a CPL theoretical pass then remains valid for licence issue for 36 months.

Exam / Certification Fees

Examination and licensing administration fees are published by CAO.IRI and collected through registered Approved Training Organizations during official exam registration.

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

14%

Air Law and ATC Procedures

CAO.IRI Part-FCL and Part-OPS regulations, commercial privileges, flight time and duty limitations, AOC requirements, and ICAO Annexes.

12%

Aircraft General Knowledge — Systems & Powerplant

Constant speed propellers, retractable landing gear, turbocharging, fuel injection, aircraft pressurization, and pneumatic anti-icing.

10%

Aircraft General Knowledge — Instrumentation

Electronic Flight Instrument Systems (EFIS), autopilot, flight directors, TCAS II, EGPWS, weather radar, and engine instrumentation.

14%

Mass & Balance and Flight Performance

Class B and Class A aircraft performance, accelerate-stop distance, balanced field length, payload range calculations, and CG envelope limits.

Human Performance

Aviation physiology, time of useful consciousness, rapid decompression, crew resource management (CRM), fatigue, and situational awareness.

14%

Meteorology

Synoptic chart analysis, jet streams, clear air turbulence, icing hazards, thunderstorm squall lines, high-altitude winds, and SIGMET decoding.

14%

Navigation & Radio Aids

Earth geometry, convergence, VOR, NDB, DME, Instrument Landing System (ILS), Area Navigation (RNAV), and GNSS integrity monitoring (RAIM).

Operational Procedures

Commercial air transport regulations, Minimum Equipment Lists (MEL/MMEL), emergency equipment, fire suppression, and dangerous goods carriage.

Principles of Flight

Multi-engine aerodynamics, asymmetric thrust, minimum control speed (Vmca), critical engine determination, and compressibility effects.

Preparing for the Iran CAO CPL Theory Exam

What You Need to Know

Passing score: 70% on each subject paper under CAO.IRI Air Crew Regulation point FCL.025(b)(1), with a penalty of 1% of the marks for every 4 wrong answers. All papers must be passed within 18 months counted from the end of the calendar month of the first attempt, and a CPL theoretical pass then remains valid for licence issue for 36 months.
Assessment: Written multiple-choice theoretical examinations administered by the Civil Aviation Organization of Iran across the 13 commercial pilot subjects listed at FCL.310 of the CAO.IRI Air Crew Regulation: Air Law, Aircraft General Knowledge (Airframe/Systems/Powerplant), Aircraft General Knowledge (Instrumentation), Mass and Balance, Performance, Flight Planning and Monitoring, Human Performance, Meteorology, General Navigation, Radio Navigation, Operational Procedures, Principles of Flight, and VFR Communications. Each paper must be passed at 70% within an 18-month window.
Time limit: Timed per subject paper per CAO.IRI examination timetables.
Exam / certification fees: Examination and licensing administration fees are published by CAO.IRI and collected through registered Approved Training Organizations during official exam registration. Official sources

Using Our Practice Resources

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Frequently Asked Questions

What is the passing score for the CAO.IRI CPL theory examinations?

Candidates must achieve at least 70% on each theoretical subject paper. CAO.IRI Air Crew Regulation point FCL.025(b)(1) sets 70% rather than the 75% used in the European Part-FCL baseline, and applies a 1% mark penalty for every 4 incorrect answers.

What are the commercial privileges granted by an Iran CAO CPL?

A Commercial Pilot License holder is privileged to act as pilot-in-command or co-pilot of aircraft engaged in commercial air transport operations for remuneration or hire.

In what language are the Iran CAO CPL theory exams written?

Examinations are administered in English, in accordance with international ICAO Annex 1 and Part-FCL flight crew licensing standards.

What medical certificate is required for the CAO.IRI CPL?

A valid Class 1 Medical Certificate issued by an authorized CAO.IRI aero-medical examiner is required to exercise commercial pilot privileges.

Does this practice bank replace official ATO training?

No. This practice bank is an independent educational prep resource created by OpenExamPrep to assist candidates in testing their theoretical knowledge before the official CAO.IRI examinations.