Thermal Expansion and Material Behavior. An aircraft structural component made of aluminum experiences a significant temperature drop when flying at high altitude. What physical change generally happens to the metal dimensions as it cools down?
Basic Pneumatics & Pressure Units. A tire pressure gauge on a landing gear strut reads 120 PSI (Pounds per Square Inch). If converted to approximate atmospheres (atm), where 1\atm is approx 14.7\PSI, how many atmospheres of pressure is this?
Aviation Rivet Identification. Look at the head markings on the solid aluminum rivet shank shown below. It has a raised dot stamped on the head. What does this specific manufacturer marking indicate about the rivet's material composition?
Electrical Circuits (Ohm’s Law Application). Based on the simple electrical circuit schematic below, a component operates on a 24-volt aircraft DC bus and draws 4 amps of current. What is the resistance of this component in ohms?
Shop Safety & Chemical Handling (MSDS). Examine the hazardous warning diamond graphic commonly found on aircraft solvent containers. What does the blue section on the left of the NFPA hazard label represent?
Material Identification (Corrosion Types). Look at the magnified cross-section image of an aluminum aircraft skin panel. A white, powdery deposit has formed along the grain boundaries. What type of aviation corrosion does this represent?
Torque Wrench Operation & Units. An engineering manual specifies that a critical bolt must be tightened to 150 inch-pounds (in-lbs). However, your available torque wrench only displays Newton Meters (NM). What value should you set the wrench to? (Note: 1 NM = 8.85 inches-lbs)
Technical Drawing & Orthographic Projections. Study the multi-view orthographic drawing (top, front, and side views) of a machined metal bracket. Which 3D isometric view correctly corresponds to these 2D projections?
Basic Mechanical Advantage (Gears). Look at the gear train diagram below. Gear A (driver) has 10 teeth and rotates counter-clockwise. It is meshed with Gear B, which has 30 teeth. In what direction and at what speed relative to Gear A will Gear B rotate?
Hydraulic Systems (Pascal's Principle). In the hydraulic actuator graphic below, a small input piston with an area of 10\cm2 is pushed with a force of 100\N. If the output piston has a larger area of 50\cm2, what is the output force generated and the resulting system pressure?
