Illinois Aviation Maintenance Technician General Examination Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf
1. The purpose of a red hydraulic system indicator light is to:
- Indicate low hydraulic fluid level
- Indicate normal system operation
- Warn of hydraulic system failure or low pressure
- Signal high hydraulic pressure
Rationale: A red hydraulic system light is a warning that the system
has failed or pressure is critically low.
2. The purpose of a magneto in an aircraft engine is to:
- Control fuel mixture
- Provide ignition independent of the battery
- Regulate engine temperature 1 / 4
- Measure engine RPM
Rationale: Magnetos generate electrical spark for ignition
independently of the battery, essential for engine operation.
3. The term “service ceiling” refers to:
- Maximum speed of an aircraft
- Maximum range
- Maximum altitude at which the aircraft can maintain a specified
- Height above the ground during takeoff
rate of climb
Rationale: The service ceiling is defined as the altitude where the
aircraft can maintain a minimum climb rate, typically 100 ft/min.
- What is the primary purpose of an aircraft aileron?
- Control pitch
- Control roll
- Control yaw
- Reduce drag
Rationale: Ailerons are hinged surfaces on the wing that control the
aircraft’s roll about its longitudinal axis.
- A typical reciprocating aircraft engine uses which type of valve timing
- Hydraulic
- Camless
- Camshaft and pushrod 2 / 4
system?
- Electronic
Rationale: Reciprocating engines use a camshaft-driven system to
open and close intake and exhaust valves at precise times.
- In a constant-speed propeller, the propeller governor is responsible
for:
- Changing engine RPM
- Adjusting fuel mixture
- Adjusting blade pitch to maintain selected RPM
- Regulating oil temperature
Rationale: The governor adjusts blade angle automatically to
maintain a constant engine RPM despite varying loads.
- What is the main purpose of the aircraft pitot-static system?
- Measure engine RPM
- Measure airspeed, altitude, and vertical speed
- Control fuel flow
- Regulate cabin pressure
Rationale: The pitot-static system provides pressure readings to
instruments like the airspeed indicator, altimeter, and vertical speed indicator.
8. The term “critical angle of attack” refers to:
- Maximum bank angle
- Maximum climb angle
- Angle of attack at which the wing stalls 3 / 4
- Angle at takeoff rotation
Rationale: Exceeding the critical angle of attack causes airflow
separation and a stall.
9. A wing flap extended during landing primarily:
- Increases speed
- Increases lift and drag
- Reduces lift
- Reduces drag
Rationale: Flaps increase the wing’s lift coefficient at lower speeds
but also increase drag to allow a safer landing approach.
- Which type of corrosion appears as a white powdery substance
- Galvanic
- Pitting
- Intergranular
- Oxidation (aluminum oxide)
on aluminum surfaces?
Rationale: Aluminum forms a white, powdery oxide when exposed to
moisture and air, a common form of corrosion.
- When inspecting an aircraft for cracks, which type of inspection
- Functional
- Visual and non-destructive testing (NDT)
- Operational
- / 4
is typically used?