Identification of terms should include the following:

Empty weight—Weight of airframe, engines, propellers, rotors and all installed operating equipment with fixed positions, weight of fixed ballast, unusable fuel, and full operating fluids, including oil and hydraulic fluid
Center of gravity (CG)—Point about which an aircraft will balance and at which the total weight of an aircraft is considered concentrated
Datum line—Imaginary vertical plane from which all horizontal moment arm measurements are taken
Station—Location in an aircraft identified by a number corresponding to its distance, measured in inches, from the datum line
Moment—Weight of an item multiplied by its arm
Arm—Horizontal distance, measured in inches, from the datum line to the CG of a specific item located in an airplane

ACS:

AM.I.C.K1
AM.I.C.K8
AM.I.C.K4

Process/Skill Questions: