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100+ Free Part-66 Module 1 Practice Questions

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2026 Statistics

Key Facts: Part-66 Module 1 Exam

32 questions

B1/B2 Exam Length

EASA Part-66 examination standard

40 minutes

Time Allowed (B1/B2)

EASA Part-66 examination standard

75%

Pass Mark per Module

EASA Part-66

3 attempts

Consecutive Tries Before 90-Day Wait

EASA Part-66 examination rules

12 June 2024

Current Syllabus Applicable Date

Commission Implementing Regulation (EU) 2023/989

3 areas

Arithmetic, Algebra, Geometry

EASA Part-66 Appendix I, Module 1

EASA Part-66 Module 1 (Mathematics) is the foundation maths module for the European aircraft maintenance licence, taken by B1 (mechanical) and B2 (avionics) candidates. The B1/B2 exam is 32 multiple-choice questions in 40 minutes; Category A is 16 questions in 20 minutes. The pass mark is 75% per module. The syllabus covers three areas: arithmetic (fractions, decimals, ratio and proportion, percentages, averages, areas and volumes, squares, cubes and roots), algebra (expressions and brackets, linear and simultaneous equations, indices and powers, binary and other number systems, quadratic equations and logarithms), and geometry (constructions, graphs of equations and functions, simple trigonometry with sine, cosine and tangent, and rectangular and polar coordinates). The real exam uses 3-option multiple choice; this practice bank uses 4 options for tougher revision. Content follows Commission Implementing Regulation (EU) 2023/989, applicable from 12 June 2024; pre-2024 courses must finish under the old standard by 12 June 2026.

Sample Part-66 Module 1 Practice Questions

Try these sample questions to test your Part-66 Module 1 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1An aircraft fuel tank is 5/8 full and contains 250 litres. What is the total capacity of the tank?
A.320 litres
B.350 litres
C.400 litres
D.200 litres
Explanation: If 5/8 of the capacity equals 250 L, then 1/8 equals 250 ÷ 5 = 50 L, so the full tank (8/8) is 50 × 8 = 400 L.
2Convert the fraction 3/8 to a decimal.
A.0.38
B.0.375
C.0.625
D.0.275
Explanation: Dividing the numerator by the denominator gives 3 ÷ 8 = 0.375 exactly.
3What is the lowest common multiple (LCM) of 6 and 8?
A.48
B.14
C.12
D.24
Explanation: The multiples of 8 are 8, 16, 24...; the multiples of 6 are 6, 12, 18, 24...; the smallest common value is 24.
4A length of control cable is 3.5 metres. How many millimetres is this?
A.35 mm
B.3500 mm
C.350 mm
D.35000 mm
Explanation: There are 1000 millimetres in one metre, so 3.5 m × 1000 = 3500 mm.
5The recorded outside air temperatures on five flights were 12, 15, 9, 18 and 6 degrees Celsius. What is the average (arithmetic mean) temperature?
A.10 degrees C
B.12 degrees C
C.15 degrees C
D.11 degrees C
Explanation: The sum is 12 + 15 + 9 + 18 + 6 = 60, and dividing by the 5 readings gives 60 ÷ 5 = 12 degrees C.
6A component originally priced at 80 euros is reduced by 15%. What is the new price?
A.65 euros
B.72 euros
C.68 euros
D.70 euros
Explanation: 15% of 80 is 0.15 × 80 = 12 euros, so the reduced price is 80 − 12 = 68 euros.
7Two gears mesh with a ratio of 3:5. If the smaller gear has 24 teeth, how many teeth does the larger gear have?
A.45 teeth
B.40 teeth
C.36 teeth
D.32 teeth
Explanation: In the ratio 3:5, one part equals 24 ÷ 3 = 8 teeth, so the larger gear has 5 × 8 = 40 teeth.
8What is the value of 2.5 × 0.04?
A.1.0
B.0.01
C.0.1
D.0.001
Explanation: Multiplying 25 × 4 = 100, and counting three decimal places (one in 2.5 and two in 0.04) gives 0.1.
9A rectangular access panel measures 0.6 m by 0.4 m. What is its area?
A.0.024 square metres
B.1.0 square metre
C.2.4 square metres
D.0.24 square metres
Explanation: The area of a rectangle is length × width = 0.6 × 0.4 = 0.24 square metres.
10What is the volume of a rectangular box measuring 2 m long, 1.5 m wide and 0.5 m high?
A.3 cubic metres
B.4 cubic metres
C.1.5 cubic metres
D.0.75 cubic metres
Explanation: The volume of a rectangular box is length × width × height = 2 × 1.5 × 0.5 = 1.5 cubic metres.

About the Part-66 Module 1 Exam

EASA Part-66 Module 1 (Mathematics) is the foundation mathematics module of the European aircraft maintenance licence (AML) syllabus. It establishes the arithmetic, algebra, geometry and trigonometry needed for the technical modules that follow. For Categories B1 and B2 the examination is 32 multiple-choice questions in 40 minutes with a 75% pass mark (Category A is 16 questions in 20 minutes). The current syllabus is set by Commission Implementing Regulation (EU) 2023/989, applicable from 12 June 2024.

Questions

32 scored questions

Time Limit

40 minutes (Category B1 and B2); Category A is 16 questions in 20 minutes

Passing Score

75% per module

Exam Fee

Varies by NAA/Part-147 organisation (approximately EUR 50-230 per module sitting) (National Aviation Authorities or approved Part-147 maintenance training organisations under EASA oversight)

Part-66 Module 1 Exam Content Outline

40%

Arithmetic

Arithmetical terms and signs, methods of multiplication and division, fractions and decimals, factors and multiples, weights, measures and conversion factors, ratio and proportion, averages and percentages, areas and volumes, and squares, cubes and square and cube roots

20%

Algebra - Expressions & Equations

Evaluating simple algebraic expressions with addition, subtraction, multiplication, division and brackets, handling simple algebraic fractions, and solving linear equations and simultaneous equations with two unknowns

20%

Algebra - Indices, Number Systems & Logarithms

Indices and powers, negative and fractional indices, binary and other applicable number systems such as octal and hexadecimal, second-degree (quadratic) equations with one unknown, and the use of logarithms

12%

Geometry - Constructions & Graphs

Simple geometrical constructions, graphical representation, and the nature and uses of graphs of equations and functions including reading gradients and intercepts

8%

Trigonometry & Coordinates

Simple trigonometry, trigonometrical relationships and the use of tables, the sine, cosine and tangent ratios, and conversion between rectangular and polar coordinates

How to Pass the Part-66 Module 1 Exam

What You Need to Know

  • Passing score: 75% per module
  • Exam length: 32 questions
  • Time limit: 40 minutes (Category B1 and B2); Category A is 16 questions in 20 minutes
  • Exam fee: Varies by NAA/Part-147 organisation (approximately EUR 50-230 per module sitting)

Keys to Passing

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

Part-66 Module 1 Study Tips from Top Performers

1Memorise the standard trigonometric values: sin 30 = 0.5, sin 60 = cos 30 = 0.866, sin 45 = cos 45 = 0.707, and tan 45 = 1.0
2Practise binary, octal and hexadecimal conversions, recalling place values 1, 2, 4, 8, 16, 32 and that hex A-F represent decimal 10-15
3Use the laws of indices fluently: add indices when multiplying (x^a times x^b = x^(a+b)), subtract when dividing, and treat a fractional index of 1/2 as a square root
4Solve simultaneous equations by elimination - add or subtract the equations to cancel one unknown, then back-substitute
5Know the area and volume formulas you will be tested on: circle area pi r squared, circumference 2 pi r, cylinder volume pi r squared h, and triangle area half base times height
6Apply Pythagoras' theorem for right-angled triangles (hypotenuse squared equals the sum of the squares of the other two sides) and remember the 3-4-5 and 5-12-13 triples

Frequently Asked Questions

How many questions are on EASA Part-66 Module 1?

For Categories B1 and B2 the Module 1 exam has 32 multiple-choice questions with 40 minutes allowed. Category A candidates sit 16 questions in 20 minutes. The pass mark is 75% across all categories.

What topics does Module 1 Mathematics cover?

Module 1 covers arithmetic (fractions, decimals, ratio and proportion, percentages, areas and volumes, roots), algebra (expressions, linear and simultaneous equations, indices, binary and other number systems, quadratics and logarithms), and geometry including simple trigonometry and rectangular and polar coordinates.

Is the real Module 1 exam 3-option or 4-option multiple choice?

The official EASA Part-66 examination uses 3-option multiple-choice questions. This free practice bank uses 4 options to make revision more demanding; the mathematical content and required knowledge are the same.

What is the pass mark for EASA Part-66 modules?

The pass mark is 75% for each module. Candidates may attempt a module up to three consecutive times, after which a 90-day waiting period applies before re-sitting.

Which regulation governs the current Module 1 syllabus?

The current syllabus is set by Commission Implementing Regulation (EU) 2023/989, applicable from 12 June 2024. Courses started under the previous standard must be completed by 12 June 2026, so new study should follow the 2023/989 syllabus.

Do I need a calculator for Module 1?

Module 1 tests core mathematics including arithmetic, indices, logarithms, quadratics and trigonometry. Check your test centre's policy, but many EASA exams require mental and manual calculation, so practise working fractions, percentages, and trigonometric values by hand.