Module Self Assessment Flashcards
The bond that is formed between a metal and a 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
B) Ionic Bond
What type of solid does not form a true lattice structure?
A) Crystalline
B) Dendritic
C) Amorphous
D) Allotropic
C) 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
C) Metallic Bond
The state at which matters exist 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
D) 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
A) Plasma
Which non Destructive Testing Method would employ the use of such items as; Vernier calipers,micrometers, mirrors and pit-gauges
a) MPI
b) VT
c) Acoustic emission testing
d) Dye testing
B) Visual Testing
Which form of testing incorporates the use of alternating circular electrical currents to detect surface discontinuities or measure coating thicknesses on thin material?
A) Magnetic current testing.
B) Radiographic testing.
C) EMF testing
D) Eddy current Testing
D) 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
C) To maintain certification of testing personnel as required by code
In a “stable” or a “neutral” atom, the number of protons in the nucleus is:
a) Greater than 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
c) The same as the number of electrons in orbit around the atom
Solids such as glass and pitch (resin and bitumen) that do not take on a crystallization form are referred to to as:
a) Amorphous
b) Crystalline
c) Cementite
d) Martensitic
a) 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
c) 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
a) 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
d) Cost and availability
All of the following are non ferrous metals except:
a) Magnesium
b) Nickel-chromium
c) Lead
d) Martensitic stainless steel
d) Martensitic stainless steel
All of the following materials are considered ferromagnetic, except:
a) Cast iron
b) Low carbon steel
c) Ferritic stainless steel
d) Aluminum
d) Aluminum
Which material contains greater than 3% carbon and some impurities, and is not useful for the manufacture of tools because it’s too brittle?
a) Wrought Iron
b) Pig Iron
c) Carbon steel
d) Cast Iron
b) 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
a) 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
d) Cheaper to buy
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
a) Thermosetting
What type of lattice structure is shown to the right (6×6)
a) Amorphous
b) Body centered cubic
c) Hexagonal Closed Packed Lattice
d) Face Centered Cubic lattice
b) Body centered cubic
What type of lattice structure is shown to the right (6x4)
a) Body Centered Cubic lattice
b) Hexagonal Closed Packed
c) Tetragonal Closed Packed lattice
D) Face Centered Cubic lattice
b) Hexagonal Closed Packed
Which of the following can have a negative influence on some Non Destructive test?
a) Grain size
b) Grain orientation
c) Grain boundary composition
d) Any of the above
d) 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
a) Allotropic
What is a phase?
a) A form of material that possesses a single charateristic structure and associated characteristic properties.
What name is given to iron when it’s temperature is raised just below its melting point?
a) Alpha iron
b) Beta iron
c) Gamma iron
d) Delta iron
d) Delta iron
What is another name given to iron carbide?
a) Martinsite
b) Pearlized
c) Cementite
d) Austenite
c) Cementite
What term describes a solid solution in which two or more atoms fill regular atom sites on a single lattice?
a) Interstitial
b) Substitutional
c) Polymorphic
d) Allotropic
b) Substitutional
Which hard, needle-like grain structure is formed due to rapid cooling?
a) Martinsite
b) Pearlite
c) Cementite
d) Austenite
a) Martinsite
A typical Alloy in steel is carbon. What diagram describes the Metallic structure and the given amount of carbon present in steel at certain temperatures?
a) the triple point diagram
b) The solid solution diagram
c) The iron carbide diagram
d) The cast iron diagram
c) The iron carbide diagram
What is the name given to the material (the flux) that helps remove impurities in the blast furnace?
a) Brimstone
b) Sandstone
c) Oxygen
d) Limestone
d) Limestone
The process of reducing iron ore to pig iron is:
a) Smelting
b) Blasting
c) Refining
d) Alloying
a) Smelting
Why is the “Hot top” of an ingot removed in the steel making process?
a) To facilitate am even cooling rate in the ingot.
b) To obtain a bloom or billet of the desired length.
c) To remove many of the discontinuities.
d) To supply liquid metal to compensate for shrinkage.
c) To remove many of the discontinuities
Which one of the following would be considered to be the the most common furnace used in steel making today?
a) Crucible furnace
b) Open hearth furnace
c) Open electric furnace
d) Electric arc furnace
d) Electric arc furnace
What is the term given to the method for the removal of impurities “trapped” in the hot top of a solidified ingot?
a) Chopping
b) Topping
c) Cropping
d) Lopping
c) Cropping
A primary shape produced by the continuous casting process that’s approximately square in cross-section, and whose cross sectional area is usually (NOT) less than 36 square inches is referred to as:
a) A bloom
b) A billet
c) An ingot
d) A slab
a) A bloom
Which of the following is considered a non useable, undesired product of the steel making process?
a) Coke
b) Iron ore
c) Slag
d) Limestone
c) Slag
What type of steel is fully de-oxidized in the steel making process?
a) Killed
b) Semi-killed
c) Rimmed
d) Capped
b) Semi-killed
A primary shape produced by the continuous casting process that’s approximately square in cross-section, and whose cross-sectional area is usually less than 36” is referred to as:
a) A bloom
b) A billet
c) An ingot
d) A slab
b) A billet
What type of casting uses an expandable mold that consist of of a mixture of silica sand, bentonite clay and some water
a) Dry sand casting
b) Green sand casting
c) Shell mold casting
d) lost wax casting
b) Green sand casting
What name is given to the bottom part of the mold flask in the casting process?
a) Cope
b) Drag
c) Gate
d) Chill
b) Drag
Non-metallic or foreign materials trapped in the solidified metal of a casting are often referred to as:
a) Porosity
b) Laminations
c) Inclusions
d) Cold shots
c) Inclusions
Which of the casting processes listed below uses “expendable” molds?
a) Die casting
b) Injection mold casting
c) Investment casting
d) Centrifugal casting
c) Investment casting
What is the name of the metal inserts that are placed inside the mold to aid in uniform cooling between thick and thin sections of the finished casting?
a) Chills
b) Chaplets
c) Cores
d) Risers
a) Chills
A discontinuity caused by gas that is released during solidification, or by the evaporation of moisture or volatile material from the surface, is indicative of:
a) Microshrinkage
b) Shrinkage cavity
c) Inclusion
d) Gas porosity
d) Gas porosity
In the casting mold, what does the runner connect?
a) The pouring basin to the sprue.
b) The downgate to the riser
c) The sprue the ingate
d) The pouring basin to the mold cavity
c) The sprue the ingate
The main difference between permanent mold casting and die casting is:
a) In permanent mold casting, molten metal enters the mold by gravity or under a low pressure vacuum or gas, while in die casting, the molten metal only enters the mold under pressure.
Which of the following acts as a reservoir of molten metal that is provided to compensate for the internal contraction of the casting as it solidifies, while also providing the necessary venting of gas or air?
a) Riser
b) Pouring cup
c) Runner
d) Sprue
a) Riser
Which of the following statements could be considered a common characteristic of both sand casting and invest casting?
a) Both may be used to produce small castings
b) Both produce castings of great dimensional accuracy
c) Both make use of wooden patterns
d) Both make use of reusable molds
a) Both may be used to produce small castings
Name the particles in an atom?
Proton, electron, neutron
What information can you get from the atomic number of an element?
Number of protons and number of electrons
