EAWS - Enlisted Aviation Warfare Specialist Aircraft Fundamentals and Systems Questions and Answers

Question 1

An aircraft's landing gear fails to retract after takeoff. The hydraulic pressure gauge indicates a rapid drop to zero, and a visual inspection from the cabin reveals fluid streaming from the right main gear wheel well. Which of the following components has most likely failed?

Accepted Answer

An actuating cylinder seal

Answer

The scenario describes a localized leak associated with a specific component's operation (landing gear). An actuating cylinder is the component that converts hydraulic pressure into the mechanical motion to move the gear. A failure of its seal would result in a significant fluid leak at that location when the system is pressurized, leading to a loss of system pressure as described. A reservoir failure would likely not be localized to the wheel well, a pump failure would cause pressure loss without a massive external leak, and a relief valve failure would typically vent fluid overboard at the valve's location, not necessarily in the wheel well.

Question 2

Most modern naval aircraft fuselages use a semi-monocoque construction. What is the primary characteristic of this design?

Accepted Answer

The skin is reinforced by a substructure of formers and stringers that share the structural load.

Answer

Semi-monocoque construction is a widely used method where the aircraft's skin is attached to a substructure of bulkheads, formers, and stringers. This design allows the skin and the substructure to share the stresses, providing a strong yet relatively lightweight structure. In contrast, a pure monocoque design relies solely on the skin, and a truss structure uses a rigid framework of tubes.

Question 3

Within a turbofan engine, what is the primary function of the compressor section?

Accepted Answer

To squeeze incoming air and increase its pressure and temperature before combustion.

Answer

The compressor section, located behind the fan, is composed of rotating blades and stationary stators that draw in air and compress it. This process significantly increases the pressure and temperature of the air, making it more volatile for efficient combustion when mixed with fuel in the combustion chamber.

Question 4

Which of the following correctly describes the typical roles of AC and DC power on a naval aircraft?

Accepted Answer

AC power is used for high-power systems like motors and heating, while DC power is used for solid-state electronics and as a backup source from batteries.

Answer

Aircraft electrical systems typically use AC as the primary generated power for heavy-load items like motors, pumps, and lighting. This AC power is then converted to DC through Transformer-Rectifier Units (TRUs). DC power is ideal for sensitive electronic components, avionics, and for charging the aircraft's batteries, which serve as an essential emergency power source.

Question 5

Movement of an aircraft around its longitudinal axis, also known as roll, is controlled by which primary flight control surface?

Accepted Answer

Ailerons

Answer

The longitudinal axis runs from the nose to the tail of the aircraft. Movement around this axis is called roll. Ailerons, located on the outboard trailing edge of the wings, move in opposite directions to create a differential in lift, causing the aircraft to roll left or right.

EAWS - Enlisted Aviation Warfare Specialist Practice Test

EAWS - Enlisted Aviation Warfare Specialist Practice Test

EAWS - Enlisted Aviation Warfare Specialist Aircraft Fundamentals and Systems Questions and Answers