Knowledge of the structure and content of the English language including the meaning and spelling of words, rules of composition, and grammar.
Knowledge of machines and tools, including their designs, uses, repair, and maintenance.
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.
Knowledge of design techniques, tools, and principles involved in production of precision technical plans, blueprints, drawings, and models.
Knowledge and prediction of physical principles, laws, their interrelationships, and applications to understanding fluid, material, and atmospheric dynamics, and mechanical, electrical, atomic and sub- atomic structures and processes.