100+ Free Bahrain CAA Part-66 AME Exam Practice Questions

Prepare for the Bahrain CAA ANTR Part-66 Aircraft Maintenance Engineer Licence Examination exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately

100+ Questions

100% Free

Loading practice questions...

Same family resources

Explore More Bahrain CAA Aviation Licensing

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Bahrain CAA Air Traffic Controller (ATCO) Licence Examination

Practice Questions100 questions

Bahrain CAA ANTR Airline Transport Pilot Licence (ATPL) Theoretical Knowledge Examination

Practice Questions100 questions

Bahrain CAA ANTR Commercial Pilot Licence (CPL) Theoretical Knowledge Examination

Practice Questions100 questions

Bahrain CAA ANTR Private Pilot Licence (PPL) Theoretical Knowledge Examination

Practice Questions100 questions

Bahrain CAA Cabin Crew Safety Training Attestation and Licence

Practice Questions100 questions

Sample Bahrain CAA Part-66 AME Exam Practice Questions

Try these sample questions to test your Bahrain CAA Part-66 AME Exam exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1When handling phosphate ester-based hydraulic fluids (such as Skydrol) during aircraft maintenance, which of the following safety practices is mandatory?

A.Wearing butyl rubber gloves, eye protection, and using dedicated Skydrol-compatible seals (such as ethylene propylene)

B.Using standard nitrile rubber gloves and petroleum-resistant Buna-N seals for all system components

C.Washing accidental skin contact immediately with mineral spirits or chlorinated solvent cleaners

D.Using neoprene personal protective equipment and standard natural rubber workshop hoses

Explanation: Phosphate ester hydraulic fluids (e.g., Skydrol) are aggressive synthetic fluids that rapidly attack ordinary elastomers like nitrile, neoprene, and Buna-N. Maintenance personnel must use butyl rubber PPE, eye protection, and ensure system seals are made of compatible elastomers like Ethylene Propylene Diene Monomer (EPDM). Accidental skin contact should be washed immediately with soap and water, never with solvents.

2During servicing of an aircraft high-pressure gaseous oxygen system, which precautionary rule must be strictly observed to prevent catastrophic spontaneous combustion?

A.Open the oxygen cylinder shutoff valve rapidly to create a sudden pressure surge that clears line debris

B.Ensure all tools, fittings, and technician hands are completely free from hydrocarbon oils, greases, and organic contaminants

C.Lubricate the oxygen bottle charging manifold threads with standard petroleum-based anti-seize grease

D.Charge the system at the highest available flow rate to minimize adiabatic compression cooling

Explanation: Pure gaseous oxygen under high pressure reacts violently with hydrocarbons (oil, grease, solvents), causing spontaneous combustion or explosion without an ignition source. All tools, fittings, and clothing must be certified oxygen-clean, and cylinder valves must be opened slowly to prevent adiabatic compression heating.

3A torque wrench has an effective lever length (L) of 15 inches. An extension adapter of length (E) equal to 5 inches is attached in-line extending directly beyond the drive head. To apply a specified torque of 120 lbf·in to a critical airframe bolt, what torque setting must be set on the wrench dial?

A.160 lbf·in

B.120 lbf·in

C.90 lbf·in

D.100 lbf·in

Explanation: When an extension adapter extends the effective length of a torque wrench in a straight line, the formula to calculate the wrench setting (S) for a desired torque (T) is: S = T × [L / (L + E)]. Substituting the values: S = 120 × [15 / (15 + 5)] = 120 × [15 / 20] = 90 lbf·in.

4When torquing a structural bolt secured by an all-metal self-locking nut, how must the prevailing (run-on) torque of the nut be incorporated into the final tightening torque?

A.The measured prevailing torque must be subtracted from the standard design torque specified in the maintenance manual

B.Prevailing torque is neglected if the fastener diameter is less than 0.375 inches

C.The torque wrench must be calibrated to zero while rotating the nut across the prevailing section

D.The measured prevailing torque must be added to the standard design torque specified in the maintenance manual

Explanation: Prevailing (run-on) torque is the friction torque required to rotate a self-locking nut onto the bolt threads before the nut seats against the washer. Because this friction absorbs part of the applied torque, the measured prevailing torque must be added to the manual's nominal torque specification to achieve the correct bolt clamping preload.

5According to standard aircraft maintenance practices, what is the required pitch (rate of twist) and direction of pull when applying the double-twist wire locking method to standard fasteners?

A.6 to 8 twists per inch, with the wire routed so that any loosening tendency of the fastener pulls the wire into tension and tightens the adjacent fastener

B.3 to 4 twists per inch, with the wire routed clockwise regardless of bolt thread direction

C.10 to 12 twists per inch, with the wire routed in a loose loop to allow thermal expansion

D.6 to 8 twists per inch, with the wire routed so that it creates a shearing force perpendicular to the bolt head

Explanation: Standard double-twist safety wiring requires 6 to 8 twists per inch (using 0.032-inch wire for general airframe hardware). The wire must always be routed in a 'positive locking' direction such that any loosening tendency of either fastener creates tension in the wire that acts to tighten the fasteners.

6When installing solid aluminum rivets in an aircraft structural repair, what are the standard rules for minimum edge distance and nominal rivet pitch (spacing between rivets)?

A.Minimum edge distance is 4 times the rivet shank diameter (4D), and nominal rivet pitch is 2 times the diameter (2D)

B.Minimum edge distance is 2 times the rivet shank diameter (2D), and nominal rivet pitch is 4 to 6 times the diameter (4D–6D)

C.Minimum edge distance is 1.5 times the rivet shank diameter (1.5D), and nominal rivet pitch is 8 to 10 times the diameter (8D–10D)

D.Minimum edge distance is 3 times the rivet shank diameter (3D), and nominal rivet pitch is 1.5 times the diameter (1.5D)

Explanation: Standard aircraft structural repair manuals (e.g., FAA AC 43.13-1B and manufacturer SRM) specify that edge distance (distance from hole center to sheet edge) must be at least 2D (typically 2D to 2.5D) to prevent sheet edge tear-out. Rivet pitch (center-to-center spacing along a seam) is nominally 4D to 6D (minimum 3D) to prevent buckling between rivets.

7What are the standard acceptable dimensional criteria for a properly driven shop (bucked) head on a solid aluminum rivet of diameter D?

A.Width of 2.0 times D, and height of 0.75 times D

B.Width of 1.0 times D, and height of 1.0 times D

C.Width (diameter) of 1.5 times D, and height of 0.5 times D

D.Width of 1.25 times D, and height of 0.25 times D

Explanation: A correctly formed solid rivet bucked head must have a width (diameter) equal to 1.5 times the original shank diameter (1.5D) and a height equal to 0.5 times the shank diameter (0.5D). This provides optimum shear and tensile retention without over-working the alloy.

8During structural riveting, what primary installation error produces a 'clenched' or 'clubbed' rivet shop head that is slanted to one side?

A.The rivet shank was too short to fill the hole volume

B.The rivet hole was reamed with excessive clearance of more than 0.010 inches

C.The pneumatic rivet gun air pressure was set too low

D.The bucking bar was held at an angle not perpendicular (square) to the rivet shank axis during driving

Explanation: A clenched (or clubbed) rivet head occurs when the bucking bar face is not held strictly perpendicular (square) to the rivet shank axis, or when the rivet gun slips off-axis. This causes the expanding shank metal to fold over unevenly toward one side rather than upsetting symmetrically.

9During a scheduled zonal inspection of an aircraft 7x19 flexible stainless steel primary flight control cable, what condition mandates immediate cable replacement?

A.Individual broken wires exceeding 3 broken wires in any one cable lay length or any individual strand with more than 1 broken wire

B.Uniform light surface discoloration with zero broken wires and no localized flat spots

C.The cable tension varies by less than 5% across seasonal ambient temperature changes

D.The turnbuckle barrel has 2 threads exposed at each terminal end

Explanation: Standard aircraft maintenance criteria (e.g., FAA AC 43.13-1B and manufacturer AMM Chapter 20) state that a control cable must be replaced if broken wires exceed 3 broken wires per lay length, or if more than 1 wire is broken in a single strand, or if broken wires are concentrated around pulleys or fairleads.

10When rigging primary flight control cables with a tensiometer in an aircraft hangar, why must the technician refer to the ambient temperature compensation chart?

A.Because the spring inside the mechanical tensiometer changes stiffness due to air humidity

B.Because the aluminum airframe expands and contracts with temperature changes at a significantly different rate than the steel control cables

C.Because the pulley friction increases at high temperatures due to lubricant viscosity thickening

D.Because control surfaces become aerodynamically heavier in warmer ambient hangar air

Explanation: Aluminum has a coefficient of thermal expansion roughly double that of carbon or stainless steel cables. As temperature rises, the aluminum fuselage expands more than the steel cables, increasing cable tension; at cold temperatures, the fuselage contracts, slackening the cables. Technicians must adjust rigging tension according to the ambient hangar temperature chart.

About the Bahrain CAA Part-66 AME Exam Exam

The Bahrain CAA ANTR Part-66 Aircraft Maintenance Engineer (AME) licence is the official credential authorising certifying technicians and engineers to issue Certificates of Release to Service (CRS) on Bahrain-registered civil aircraft. Regulated under the Air Navigation Technical Regulations (ANTR Part-66) and harmonised with ICAO and EASA standards, candidates must pass modular examinations across maintenance practices, aviation legislation, human factors, and aircraft systems.

Assessment

Modular basic knowledge examinations, each passed independently. ANTR 66 Appendix II requires multi-choice questions with three alternative answers of which only one is correct, plus essay questions drawn from Modules 7A, 9A and 10. Examinations are conducted by ANTR 147 approved maintenance training organisations or the CAA. Separately, CAP 21 requires applicants for initial issue of a Bahraini Aircraft Maintenance Licence to sit an open-book Air Law written examination (ANTR made available), pass mark 75%, time allowed 2 hours.

Time Limit

Nominal 75 seconds per multi-choice question per module, plus 20 minutes per essay question; the CAP 21 Air Law paper is allotted 2 hours

Passing Score

75% for each module's multi-choice part and 75% of the required key points for each essay question, with no penalty marking; a failed module may not be retaken for 90 days (30 days after tailored ANTR 147 retraining), maximum three consecutive attempts

Exam Fee

BD 60 for each written and/or practical examination and BD 60 for issue of a technician/aircraft maintenance licence (CAP 18 Schedule of Charges, section 1.3.3). Licence renewal every 5 years is 50% of the licence fee, replacement is BD 100 and additional categories or revisions are BD 50. (Civil Aviation Affairs (CAA) — Ministry of Transportation and Telecommunications, Kingdom of Bahrain)

Bahrain CAA Part-66 AME Exam Exam Content Outline

22%

Maintenance Practices & Line Procedures (M7)

Workshop safety, tooling, torque loading, locking wire, fasteners, rivets, control cable rigging, NDT methods, and Certificate of Release to Service (CRS) procedures.

18%

Aviation Legislation & ANTR Regulations (M10)

Bahrain ANTR Part-66 licensing categories, ANTR Part-145 maintenance organisations, ANTR Part-M continuing airworthiness, Airworthiness Directives, and the MEL.

14%

Human Factors in Aviation Maintenance (M9)

SHEL model, the Dirty Dozen maintenance error precursors, communication, circadian fatigue, complacency, situational awareness, and Just Culture principles.

12%

Materials, Hardware & Corrosion Control (M6)

Aircraft alloys, titanium, composite matrix systems, prepregs, standard fasteners, corrosion identification, and protective surface treatments.

12%

Electrical & Electronic Fundamentals (M3/M4/M5)

Ohm's and Kirchhoff's laws, AC and DC generation, batteries, circuit protection, digital logic gates, ARINC 429 data buses, and ESD safety.

10%

Turbine Engines & Powerplant Systems (M15/M17)

Brayton cycle, axial compressors, combustion chambers, turbine cooling, FADEC, dry-sump lubrication, high-energy ignition, and thrust reversers.

Basic Aerodynamics & Aircraft Structures (M8/M11)

Aerodynamic forces, boundary layer, stalls, flight control surfaces, primary structures, pressurisation, and landing gear systems.

Mathematics & Physics Fundamentals (M1/M2)

Algebra, trigonometry, mechanics, moments, Pascal's principle in aircraft hydraulics, fluid pressure, and temperature conversions.

How to Pass the Bahrain CAA Part-66 AME Exam Exam

What You Need to Know

Passing score: 75% for each module's multi-choice part and 75% of the required key points for each essay question, with no penalty marking; a failed module may not be retaken for 90 days (30 days after tailored ANTR 147 retraining), maximum three consecutive attempts
Assessment: Modular basic knowledge examinations, each passed independently. ANTR 66 Appendix II requires multi-choice questions with three alternative answers of which only one is correct, plus essay questions drawn from Modules 7A, 9A and 10. Examinations are conducted by ANTR 147 approved maintenance training organisations or the CAA. Separately, CAP 21 requires applicants for initial issue of a Bahraini Aircraft Maintenance Licence to sit an open-book Air Law written examination (ANTR made available), pass mark 75%, time allowed 2 hours.
Time limit: Nominal 75 seconds per multi-choice question per module, plus 20 minutes per essay question; the CAP 21 Air Law paper is allotted 2 hours
Exam fee: BD 60 for each written and/or practical examination and BD 60 for issue of a technician/aircraft maintenance licence (CAP 18 Schedule of Charges, section 1.3.3). Licence renewal every 5 years is 50% of the licence fee, replacement is BD 100 and additional categories or revisions are BD 50.

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

Bahrain CAA Part-66 AME Exam Study Tips from Top Performers

1Focus intensely on Maintenance Practices (Module 7), Aviation Legislation (Module 10), and Human Factors (Module 9), as these core modules carry significant weight across all licence categories.

2Master Bahrain ANTR regulatory frameworks, including Part-66 licence privileges, Part-145 maintenance organization approvals, Part-M continuing airworthiness requirements, and CRS release documentation.

3Learn standard aircraft hardware specifications, torque calculation formulas with drive extensions, locking wire standards, and electrical bonding resistance thresholds (5 milliohms).

Frequently Asked Questions

What is the Bahrain CAA ANTR Part-66 Aircraft Maintenance Engineer Licence?

The ANTR Part-66 licence is the official aircraft maintenance credential issued by the Bahrain Civil Aviation Affairs (CAA) under the Ministry of Transportation and Telecommunications (MTT). It grants certifying staff the statutory privilege to issue a Certificate of Release to Service (CRS) following maintenance on aircraft registered in the Kingdom of Bahrain.

What are the licence categories under Bahrain ANTR Part-66?

ANTR Part-66 establishes four main categories: Category A (Line Maintenance Certifying Mechanic), Category B1 (Mechanical Certifying Technician covering airframes and powerplants), Category B2 (Avionics Certifying Technician covering electrical, instrument, and avionic systems), and Category C (Base Maintenance Certifying Engineer).

What is the passing score for the Bahrain ANTR Part-66 module exams?

The passing standard is 75% on each individual multiple-choice module paper and essay question, aligned with international ICAO and EASA Part-66 standards. Each module is graded independently and must be passed separately.

Where are Bahrain CAA AME examinations conducted?

Basic module examinations are conducted by maintenance training organisations approved under ANTR 147, which is the part the Bahrain CAA lists against the F152 ANTR 147 approval application. In addition, CAP 21 requires every applicant for initial issue of a Bahraini Aircraft Maintenance Licence to sit the CAA's own Air Law written examination, taken by pre-arranged appointment with the Aviation Permits and Licensing Section; that paper is open book with the ANTR made available, has a 75% pass mark and is allotted 2 hours.