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EASA Part-66 Module 7 Cats A · B1 · B2 · B2L · B3

Maintenance Practices EASA Part-66 — Module 7 Practice Questions

Module 7 covers the workshop and hangar skills every licensed engineer uses daily — safe working, hand and precision tools, riveting, electrical wiring, inspection methods and the documentation that turns hands-on work into a certified job. Below: what's covered, exam format, and seven sample questions in the same style you'll meet on exam day.

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Every question comes with a worked, EASA-grounded explanation — understand why, don't just memorise.
1 391
Questions in bank
5
Syllabus sections
100 min
Exam time (B1/B2)
75 %
EASA pass mark

Module 7 is examined partly by written essay. See 20 worked model essay answers for this module, each with the examiner Key Points. Open Module 7 essays →

Syllabus at a glance

Full Module 7 syllabus
Section 7.1
Safety Precautions
  • Safe working with electricity, gases (especially oxygen), oils & chemicals
  • Remedial action in the event of fire or accident
  • Extinguishing agents & their correct application
Section 7.3
Tools
  • Common hand & power tools
  • Precision measuring — micrometers, vernier calipers, dial indicators, depth gauges
  • Lubrication equipment & general electrical test equipment
Section 7.7
Electrical Wiring (EWIS)
  • Continuity, insulation & bonding testing
  • Crimping tools, connector pin removal & insertion
  • Co-axial cable testing, wire protection & identification
  • EWIS installation standards & inspection (B1/B2)
Section 7.8
Riveting
  • Riveted joints, rivet spacing & pitch
  • Tools used for riveting & dimpling
  • Inspection of riveted joints (B1/B2)
Section 7.18
Inspection & NDI
  • Types of defects, deterioration & visual inspection
  • Corrosion removal, assessment & re-protection
  • Dye penetrant, eddy current, ultrasonic, radiographic & borescope inspection
  • Troubleshooting & fault-finding methodologies

Three classic exam-day traps

Right extinguisher for the wrong fire

Water on an electrical or brake fire is a classifier-killer. CO2 suits electrical and engine fires, dry powder suits wheel and brake fires, water spray is for solids only.

Rivet edge distance & pitch

Edge distance should be not less than 2D (rivet diameter) and rivet pitch sits between 3D and 10D. Confusing the two — or forgetting the limit is a minimum, not a target — costs marks every sitting.

Dye penetrant vs magnetic particle

Dye penetrant works on any non-porous material but only catches defects open to the surface. Magnetic particle is limited to ferromagnetic parts and reaches just below the surface — pick by material, not by habit.

What Module 7 covers — in plain English

Module 7 of the EASA Part-66 syllabus is the most practically-oriented of the certifying modules: it codifies the workshop, hangar and flight-line skills that turn theory into a maintenance action a licensed engineer can sign off. Safety procedures, tool selection, fits and clearances, riveting, electrical wiring, sheet metal and composite work, weight and balance, aircraft handling, defect inspection and the documentation that closes the loop — all of it sits inside Module 7. Examiners weight it accordingly: it carries one of the longest multiple-choice papers in the syllabus.

The exam includes a written-essay component in every category. Category A candidates sit 76 multiple-choice questions in 95 minutes plus two essays. B1 and B3 candidates sit 80 multiple-choice questions in 100 minutes plus essays; B2 and B2L candidates sit 60 multiple-choice questions in 75 minutes because several mechanical sub-sections (riveting, pipes and hoses, springs, bearings, transmissions, control cables, sheet metal) drop out of their syllabus. Allow a full 40 minutes for the essay portion on top of the MCQ time when planning your revision schedule.

Knowledge levels are demanding. Safety precautions, workshop practices, tools and EWIS are level 3 for B1/B2/B3 candidates — you must be able to apply the theory in a practical situation, explain procedures and use technical terminology correctly. Defects and visual inspection are also level 3 for B1/B2/B3. Most of the remaining sub-sections sit at level 2. The full per-section breakdown is on our Module 7 syllabus page.

These samples are drawn from our live Module 7 question bank of 1 391 questions. The full timed practice quiz draws 80 questions per attempt (or 76 for Cat A), scored against the official EASA 75 % pass mark, with weak-area tracking across attempts.

7 free sample questions

Click "Reveal answer + explanation" after you've picked.

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Q1 Safety · Fire Classes

Which type of extinguisher can be used for an electric fire?

  1. A Foam
  2. B Water
  3. C CO2
Reveal answer + explanation Hide answer
Correct answer: C — CO2
CO2 is non-conductive and leaves no residue, so it is the standard choice for live electrical fires. Foam and water both conduct and create a shock hazard to the operator. Once the supply is isolated, the fire may be re-classified by what is actually burning.
Q2 Safety · Wheel & Brake Fires

The most appropriate fire extinguisher for an aircraft wheel and brake fire would be

  1. A carbon dioxide.
  2. B dry powder.
  3. C water spray.
Reveal answer + explanation Hide answer
Correct answer: B — dry powder.
Aircraft wheels and brakes contain magnesium alloy components. Dry powder smothers the burning metal without the violent reaction that water produces with hot magnesium, and without the thermal shock that CO2 can cause to a hot brake assembly.
Q3 Tools · English Micrometer

One revolution of the thimble of the English micrometer produces a linear movement of the spindle of

  1. A 0.001 inch.
  2. B 0.025 inch.
  3. C 0.040 inch.
Reveal answer + explanation Hide answer
Correct answer: B — 0.025 inch.
The English micrometer screw thread has a pitch of 0.025 inch (40 threads per inch), so one full turn of the thimble moves the spindle 0.025". The thimble itself is divided into 25 equal divisions, giving a final resolution of 0.001" per division.
Q4 EWIS · Insulation Testing

To carry out an insulation test on a wire rated at 115 volts you would use

  1. A a 250 volt megger.
  2. B a 115 volt megger.
  3. C a 500 volt megger.
Reveal answer + explanation Hide answer
Correct answer: A — a 250 volt megger.
The megger test voltage should sit comfortably above the wire's working voltage so the insulation is meaningfully stressed, but not so high that good insulation is damaged. The standard rule for a 115 V circuit is a 250 V megger; 500 V is reserved for higher-voltage systems.
Q5 Riveting · Edge Distance

When riveting, the distance from the edge to the rivet (land) should not be less than

  1. A 1D.
  2. B 2D.
  3. C 4D.
Reveal answer + explanation Hide answer
Correct answer: B — 2D.
Edge distance is measured from the centre of the rivet hole to the edge of the sheet and must be not less than 2D (twice the rivet shank diameter). Too close to the edge and the sheet shears out under load; too far and the joint loses bending stiffness.
Q6 NDI · Eddy Current

The eddy current method of flaw detection can detect

  1. A sub-surface flaws only, below the immediate surface layer.
  2. B surface flaws and those just beneath the surface.
  3. C surface flaws only, not those beneath the surface.
Reveal answer + explanation Hide answer
Correct answer: B — surface flaws and those just beneath the surface.
Eddy currents are induced by an AC coil and decay rapidly with depth (the skin effect), so the method picks up surface and shallow sub-surface defects in any electrically conductive material. Penetration depth is set by the probe frequency — lower frequency reaches deeper.
Q7 NDI · Magnetic Particle

Which of the following metals can be inspected using the magnetic particle inspection method?

  1. A Aluminium alloys.
  2. B Iron alloys.
  3. C Magnesium alloys.
Reveal answer + explanation Hide answer
Correct answer: B — Iron alloys.
Magnetic particle inspection (MPI) needs a ferromagnetic part — iron, steel and a few nickel/cobalt alloys. Aluminium and magnesium cannot be magnetised enough to hold the leakage field at a defect, so dye penetrant or eddy current is used on those materials instead.
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Module 7 — frequently asked questions

How many questions are in the EASA Part-66 Module 7 exam?
The number depends on your licence category. Category A candidates sit 76 multiple-choice questions, while Category B1 candidates sit 80 multiple-choice questions. Both papers also include a written-essay component in addition to the multiple-choice questions.
What is the pass mark for EASA Part-66 Module 7?
The pass mark for Module 7 is 75%, the same as every other EASA Part-66 module. Because Module 7 also carries an essay component, you must reach the required standard on the essay as well as the multiple-choice paper to pass the module overall. Practising a wide range of questions is the surest way to stay above the 75% line.
How long is the Module 7 exam?
Category A candidates are allowed 95 minutes for the 76 multiple-choice questions, and Category B1 candidates are allowed 100 minutes for the 80 multiple-choice questions. Additional time is allocated for the written-essay portion on top of the multiple-choice time. Working at roughly one question per minute leaves a small buffer for review.
Which EASA licence categories require Module 7?
Module 7, Maintenance Practices, is required across Cats A, B1, B2, B2L and B3. It is one of the broadest modules in the syllabus because the workshop, tooling and inspection skills it covers apply to every certifying engineer. The depth of some mechanical sub-sections varies by category, but the module itself is common to all of them.
What does Module 7 cover, and what do students find hardest?
Module 7 codifies the hands-on skills of maintenance: safety precautions, hand and precision tools, electrical wiring (EWIS), riveting, and inspection and non-destructive testing. Students most often lose marks matching the right extinguisher to the right fire — CO2 for electrical, dry powder for wheel and brake fires, water spray for solids only. Rivet edge distance (not less than 2D) and pitch are frequently confused, and candidates forget these are minimums, not targets. The NDI section trips people up too: dye penetrant works on any non-porous material but only for surface-breaking defects, while magnetic particle is limited to ferromagnetic parts.
Does Module 7 include essay questions?
Yes. Under Regulation (EU) 2023/989, Module 7 is the only EASA Part-66 module still examined by essay — Modules 9 and 10 became multiple-choice only in 2024. The UK CAA retains essays for Modules 7, 9 and 10. You can review worked model essays on our Module 7 essay questions page.

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Other EASA Part-66 modules

All modules
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1. Mathematics
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2. Physics
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3. Electrical fundamentals
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4. Electronic fundamentals
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5. Digital techniques / Electronic instrument systems
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6. Materials & hardware
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8. Basic aerodynamics
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9. Human factors
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10. Aviation legislation
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11. Aeroplane aerodynamics, structures and systems
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12. Helicopter aerodynamics, structures and systems
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13. Aircraft aerodynamics, structures and systems
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14. Propulsion
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15. Gas turbine engine
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16. Piston engine
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17. Propeller

Module 7 study resources

Module 7 detailed syllabus
Per Commission Regulation (EU) 2023/989
Module 7 study notes
Topic-by-topic explanations
Q&A forum
Ask about tricky Module 7 questions
EASA licence categories
A · B1 · B2 · B2L · B3 overview

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