Chapter 1 Flashcards
Losing an electron makes it electropositive (positive ion)
True or False?
True
_________________ alter a material’s properties in a controlled manner to produce components of products.
Manufacturing Processes
Helium has greater ionization energy than Hydrogen.
True or False?
True
Polymeric materials that are formed into a variety of three-dimensional shapes; large molecules (bulky) ; molecules are not compact (low density) ; polymers are flexible
Plastics
Production is performed on a start-and- stop basis, such as for the manufacture of made-to-order products.
Intermittent Production System
It has an electrical conductivity value falling between that of a conductor and an insulator.
Semiconductors
The process of extrusion belongs to what category of shaping process
Deformation Process
Starting material is used and no subsequent machining is required to achieve final part geometry
Net shape Processes
Strength, toughness, ductility, hardness, elasticity, fatigue, and creep belong to what property ?
Mechanical properties
It is the property of a material that shows little or no plastic deformation before fracture when a force is applied.
brittleness
Type of bonding in which electrons are shared between atoms in their outmost shell to become stable.
Covalent
atoms are located at regular and recurring positions in three dimension
Crystalline Structures
In _________ bonding , there is sharing of outer shell electrons by all atoms to form a general electron cloud that permeates the entire block
Metallic
Such materials which only melt a very high temperatures are called _____ materials.
fusibility
Sodium has larger atomic radius than hydrogen
True or False?
True
Strength is the ability of a material to resist applied forces without fracturing.
True or False?
True
_____ is defined as the gradual extension of a material over a long period of time whilst the applied load is kept constant.
Creep
The resistance of magnetic circuit is referred to as
Reluctance
Surface processing that refers to mechanical working such as sand blasting, and physical processes like diffusion
Surface Treatments
This is the ease with which materials will melt.
Fusibility
Medium production quantity ranges
100 to 10,000 units
These includes such properties as density, and the properties displayed when a force is applied to a material, e.g. yield strength, strength, stiffness,hardness, toughness
Mechanical properties
Examples of this classification of industry are banking, education, government, legal services, retail trade, transportation
Tertiary industries
Density, Thermal expansion, conductivity, specific heat, melting point, and electrical and magnetic properties are under _____ property
Physical
Low strength and high resistance to corrosion
Non-Ferrous Matals
It combines high production volume with high product variety.
Mass Customization
The good magnetic conductors have low reluctance
True or false?
True
Gaining an electron (negative ion) – electropositive
True or false?
False
groups of atoms that are normally agglomerated together
Microscopic
The resistance of magnetic circuit is referred to as
Reluctance
It is the ability of a material to deform under load and return to its original size and shape when the load is removed.
Elasticity
metals and alloys containing a high proportion of the element iron.
Ferrous metals
starting material is a ductile/brittle solid, from which material is removed
Material Removal Processes
Basic structural unit of matter
Atoms
It is the ability of a material to withstand scratching (abrasion) or indentation by another hard body
Hardness
These are, for example, relevant in considerations of abrasion and wear,
corrosion and solvent resistance
Surface Properties
strongest materials available and are used for applications where high strength is required at relatively low cost and where weight is not of primary importance.
Ferrous metals
Classification of industry that cultivates and exploits natural resources
Primary Industries
It is the state of a material which has been loaded beyond its elastic limit so as to cause the material to deform permanently.
Plasticity
starting material is a heated liquid that solidifies to form part geometry
Solidification Processes
