materials + processes Flashcards
(47 cards)
The bond that is formed between a metal and non-metal where the metal donates one or more electrons to the non-metal and causes the formation of two opposing ions is referred to as a:
a) Covalent bond
b) ionic bond
c) metallic bond
d) james bond
Ionic bond
What type of solid does not form a true lattice structure?
a) crystalline
b) dentric
c) amorphous
d) allotropic
Amorphous
Which type of bond is based on the electromagnetic interaction between delocalized electrons and positive ions?
a) covalent bond
b) ionic bond
c) metallic bond
d) iconic bond
Metallic bond
The state at which matter exists as a solid, a liquid, and a gas is referred to as the:
a) equilibrium point
b) critical point
c) sublimation point
d) triple point
Triple point
What name is given to an ionized gas that contains positive and negative ions that are derived from various origins, such as heat, electricity or electromagnetic energy?
a) plasma
b) inert
c) argon
d) isotope
Plasma
Which non-destructive testing method would employ the use of such items as; Vernier calipers, micrometers, mirrors and pit-gauges?
a) magnetic particle testing
b) visual testing
c) acoustic testing
d) dye testing
visual testing
Which form of testing incorporates the use of alternating circular electrical currents to detect surface discontinuities or measure coating thickness on thin materials?
a) magnetic particle testing
b) radiographic testing
c) EMF testing
d) eddy current testing
Eddy current testing
each of the following are reasons that NDT is performed on manufactured and in-service articles, except:
a) to verify proper assembly of complex components
b) to locate discontinuities that can affect the life of the article
c) to maintain certification of testing personnel as required by code
d) to screen or sort incoming materials
To maintain certification of testing personnel as required by code
in a “stable” or “neutral” atom, the number of protons in the nucleus is:
a) greater then the number of electrons in orbit around the atom
b) less than the number of electrons in orbit around the atom
c) the same as the number of electrons in orbit around the atom
d) dependant on the number of neutrons outside the atom
The same as the number of electrons in orbit around the atoma
Solids such as glass and pitch (resin and bitumen) that do not take on a crystilline form are referred to as:
a) amorphous
b) crystalline
c) cementite
d) martensitic
amorphous
Stainless steels are available in wrought and cast form. These types of materials most often contain:
a) no less than 25% iron
b) no less than 30% iron
c) no less than 50% iron
d) no less than 55% iron
No less than 50% iron
What name is given to a material that contains a high purity of iron and some slag?
a) wrought iron
b) cast iron
c) malleable cast iron
d) iron ore
Wrought iron
Which of the following would most likely NOT be a reason that non-ferrous materials would be used over ferrous materials?
a) corrosion resistance
b) increased strength
c) appearance
d) cost and availability
Cost and availability
All of the following are materials considered ferromagnetic, except:
a) magnesium
b) nickel-chromium
c) lead
d) martensitic stainless steel
martensitic stainless steel
All of the following materials are considered ferromagnetic, except:
a) cast iron
b) low carbon steel
c) ferritic steel
d) aluminum
aluminum
Which material contains greater than 3% carbon and some impurities, and is not useful for the manufacture of tools because its too little?
a) wrought iron
b) pig iron
c) carbon steel
d) cast iron
pig iron
What term is given to a material or substance that contains two or more elements, where at least one of the elements is a metal?
a) alloy
b) compound
c) solution
d) isotope
alloy
Each of the following would be considered reasons for using metals over composites or plastics, except:
a) increased strength
b) increased hardness
c) higher impact resistance
d) cheaper to buy
cheaper to by
This type of plastic undergoes a chemical change when heated that prevents it from having the ability to be reheated and re-molded.
a) thermosetting
b) thermoplastics
c) polystyrene
d) polyethylene
thermosetting
What type of lattice structure is shown?
a) amorphous
b) body centered cubic
c) hexagonal closed packed
d) face centered cubic
face centered cubic
what type of lattice structure is shown?
a) body centered cubic lattice
b) hexagonal closed packed
c) tetragonal closed packed lattice
d) face cantered cubic lattice
hexagonal closed packed
Which of the following can have a negative influence on some non-destructive tests?
a) grain size
b) grain orientation
c) grain boundary composition
d) any of the above
any of the above
What is the term used for a solid that can exist in more than one crystalline form, depending on its temperature?
a) allotropic
b) amorphous
c) cementite
d) tuyeres
tuyeres
What is a phase?
a) a form of material that possesses a single characteristic structure and associated characteristic properties
b) a form of material that possesses a dual characteristic structure and a single characteristic properties
c) an alloy that possesses several different lattice structure characteristics and directional properties
d) a form of heat treatment that promotes a characteristic structure and property in alloys
a form of material that possesses a single characteristic structure and associated characteristic properties
