CAAB AME B2 Exam flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Pythagorean theorem

In a right-angled triangle, the square of the hypotenuse equals the sum of the squares of the other two sides: c² = a² + b².

Quadratic formula

The solutions of ax² + bx + c = 0 are x = [−b ± √(b² − 4ac)] / (2a), provided a is not zero.

Sine rule

In any triangle, each side divided by the sine of its opposite angle is constant: a/sin A = b/sin B = c/sin C.

Newton's second law

The resultant force on a body equals its mass multiplied by its acceleration (F = ma); force and acceleration act in the same direction.

Bernoulli's principle

In steady, incompressible flow along a streamline, an increase in fluid speed produces a decrease in static pressure and vice versa.

Snell's law

For light crossing an interface, n₁ sin θ₁ = n₂ sin θ₂, where n is refractive index and θ is the angle measured from the normal.

Ohm's law

For a linear conductor at constant temperature, voltage equals current multiplied by resistance (V = IR); power is P = VI = I²R.

Kirchhoff's current law

The algebraic sum of currents entering a circuit node equals the sum leaving it; charge is conserved at the junction.

Inductive reactance

The opposition of an inductor to alternating current, given by X_L = 2πfL, where f is frequency in hertz and L inductance in henries.

Transformer turns ratio

For an ideal transformer, Vp/Vs = Np/Ns, and the current ratio is inverse, Ip/Is = Ns/Np, neglecting losses.

Zener diode

A diode designed to operate in reverse breakdown at a specified voltage, used to regulate or clamp voltage in a circuit.

Op-amp inverting gain

For an ideal inverting operational amplifier, voltage gain equals −Rf/Rin, where Rf is the feedback resistor and Rin the input resistor.

RC low-pass cutoff

The −3 dB cutoff frequency of a first-order RC low-pass filter is f_c = 1/(2πRC), where R is resistance and C capacitance.

ADC resolution

For an n-bit analogue-to-digital converter with reference voltage Vref, the smallest resolvable step is Vref divided by 2^n.

ARINC 429

A unidirectional serial avionics data bus using 32-bit words, commonly transmitting from one transmitter to multiple receivers at defined rates.

XOR gate

A logic gate whose output is high when exactly one input is high; with two inputs it outputs high for 01 or 10, low for 00 or 11.

ECAM

Electronic Centralised Aircraft Monitor: an Airbus system that displays engine and system parameters and presents abnormal-system checklists to the crew.

Galvanic corrosion

Corrosion caused by electrical contact between dissimilar metals in an electrolyte, where the more anodic metal corrodes preferentially.

Delamination

Separation of layers in a composite laminate, often caused by impact, moisture, or manufacturing defects, reducing strength and stiffness.

Aluminium 2024

A copper-bearing aluminium alloy with high strength and relatively low corrosion resistance, often clad with pure aluminium for aircraft skins.

Torque wrench calibration

Periodic verification of a torque wrench against a traceable standard to ensure applied torque is within specified tolerance; records are retained.

Dye penetrant inspection

A non-destructive test where penetrant enters surface-breaking defects, is drawn out by developer, and shows a visible indication under suitable light.

Eddy current testing

A non-destructive method inducing alternating currents in a conductive material; changes in coil impedance reveal cracks, corrosion, or thickness variation.

FOD

Foreign Object Debris or Damage: loose material that can be ingested or strike aircraft parts, causing damage; prevention includes tool control and inspections.

Angle of attack

The angle between the wing chord line and the relative airflow; increasing it raises lift until the critical angle, beyond which the wing stalls.

Critical Mach number

The free-stream Mach number at which airflow somewhere on the aircraft first reaches Mach 1, producing shock waves and drag rise.

Load factor

The ratio of lift to weight, n = L/W; a level turn increases load factor, raising stall speed and structural loading.

SHELL model

A human-factors framework showing the liveware (people) at the centre, interacting with software, hardware, environment, and other liveware.

Swiss cheese model

An accident model in which multiple defences each have weaknesses; an accident occurs only when holes in all layers align.

Circadian rhythm

A roughly 24-hour internal biological cycle influencing sleep, alertness, body temperature, and performance; disruption causes fatigue.

Airworthiness Directive

A mandatory instruction issued by an airworthiness authority to correct an unsafe condition; compliance is required for continued airworthiness.

Part-145

EASA regulation governing approved maintenance organisations, defining facilities, personnel, procedures, and quality requirements for aircraft maintenance.