Mathematics
Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.
Building and Construction
Knowledge of materials, methods, and the tools involved in the construction or repair of houses, buildings, or other structures such as highways and roads.
Education and Training
Knowledge of principles and methods for curriculum and training design, teaching and instruction for individuals and groups, and the measurement of training effects.
Mechanical
Knowledge of machines and tools, including their designs, uses, repair, and maintenance.