ToolingU Materials Questions and Answers 100% Correct!!

Abrasives - ANSWER-A material made of hard, sharp particles used for cutting chips from a workpiece surface. They are often used in finishing operations that clean, polish, or otherwise prepare the surface of a part. Aluminum Oxide - ANSWER-A chemical compound of aluminum and oxygen that is used as a conventional abrasive. It is extremely durable. Atom - ANSWER-The smallest unit of an element. It consists of protons and neutrons in a center nucleus and orbiting electrons. Carbon Fiber - ANSWER-A material made from slender, thread-like strands of carbon, a strong nonmetallic element. It is a rigid material with good tensile strength, chemical resistance, and temperature tolerance. Ceramic - ANSWER-A hard, brittle material that can withstand high temperatures and resist corrosion. Ceramics include traditional materials such as brick and clay, as well as advanced ceramics used as abrasives, cutting tools, and electrical components. Chemical Resistance - ANSWER-A material's ability to resist the gradual degradation caused by the atmosphere, moisture, or other substances. Several structural adhesives have strong chemical resistance. Composite - ANSWER-A material made by combining materials from two or more of the following groups: metals, plastics, and ceramics. Composites are often used to make aircraft components and athletic equipment. Composites - ANSWER-A material made by combining materials from two or more of the following groups: metals, plastics, and ceramics.Composites are often used to make aircraft components and athletic equipment. Conductor - ANSWER-A material that allows free movement of electrons and therefore enables the easy flow of electricity. Most conductors are metals. Coolants - ANSWER-A cutting fluid used to decrease the temperature of the tool and workpiece during machining. Metal cutting operations use coolants to counteract the high temperatures created during cutting. Corrosion - ANSWER-The gradual deterioration of a material due to atmosphere, moisture, chemicals, or other agents. Corrosion often appears as rust. Corrosion Resistant - ANSWER-A material's ability to resist the gradual degradation caused by the atmosphere, moisture, or other substances. Corrosion resistant parts function properly for a longer period of time. Crucibles - ANSWER-A ceramic container in which substances can be melted at high temperatures. Crucibles used in metallurgy are made of ceramics. Crystal Structures - ANSWER-The regular, repeating pattern of atoms in a material. Crystal structures in a metal develop as the metal drops below the recrystallization temperature and solidifies. Density - ANSWER-The amount of mass within a specific volume of a substance. Objects with greater density increase in mass and weight. Dielectric Strength - ANSWER-The voltage at which the insulating qualities of a material break down. Ceramics and plastics have a high dielectric strength. Durability - ANSWER-The ability of materials to withstand extended exposure to environmental wear and mechanical forces. Ceramics tend to have good durability. Electrical Conductivity - ANSWER-A material's ability to act as a medium for conveying electricity. Electrical conductivity depends on the material's structure. Electromagnet - ANSWER-A magnet formed from electric current. An electromagnet is typically formed by wrapping wire around an iron core and electrically charging it. Electron - ANSWER-A negatively charged particle that orbits the nucleus of an atom. Electrons are involved in chemical bonding and electrical conductivity. Electrons - ANSWER-A negatively charged particle that orbits the nucleus of an atom. Electrons are involved in chemical bonding and electrical conductivity. Fiberglass - ANSWER-A lightweight and strong material composed of fine glass fibers. Fiberglass is used as a reinforcement in many composites. Hardness - ANSWER-A material's ability to resist indentation or scratching. An increase in hardness generally leads to a decrease in toughness, or ability to withstand fracture. Insulation - ANSWE