IMSE 250 Quiz #1
Generally speaking, the products of _______ can only be obtained in a limited number of standard cross-sectional shapes. A) rolling B) extrusion C) forging
A) rolling
After the press punches out the disk, it also changes the disk into a cup (as shown to the right). Technically speaking, this process (of transforming the disk into a cup) should be called _______ A) bending. B) drawing.
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Both piercing and blanking are shearing operations. The difference is that the piece being punched out becomes the _______ A) workpiece for piercing (scrap for blanking) B) scrap for piercing (workpiece for blanking)
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In shearing, the metal is deformed _______ A) beyond its yield strength but below its ultimate tensile strength. B) beyond its ultimate tensile strength. C) below its yield strength.
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In the video "How It's Made - Aluminum Cans," the aluminum sheet is fed into to a press that punches out round pieces that will be formed into cans. This process is called _______ A) blanking. B) piercing.
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Many processes are used in manufacturing of aluminum cans. Most of these processes belong to the family of _____________. A) Casting B) Deformation (Forming) C) Material removal (Machining) D) Consolidation (Joining) E) Additive
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Suppose surface A has roughness Rmax = 1 μm and surface B has roughness Ra = 0.75 μm. Which surface is smoother? A) Surface A B) Surface B C) Cannot tell
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The products produced by cold-working processes are ______ ductile than those by hot-working processes. A) more B) less
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Typically, metal cold-working processes are conducted at a temperature _______ A) higher than 0.6 times the melting point B) lower than 0.3 times the melting point C) about the recrystallization temperature
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Which category of metal forming processes generally produces better surface finish? A) Hot working B) Cold working
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Normalizing gives _______ steel than full annealing. A) stronger and more brittle B) weaker and more ductile C) stronger and more ductile D) weaker and more brittle
A) stronger and more brittle
A part made by sand casting, in order to be easily removed from a mold, a _______ draft has to be designed. A) positive B) negative
A) positive
Manufacturing in the U.S. will all be moved to other countries. A) True B) False
B False
In hot working processes, the minimum temperature (recrystallization temperature) should be about _______ times the melting point of the metal. A) 0.4 B) 0.6 C) 0.8
B) 0.6
Generally speaking, steels are Fe-C alloys with less than about _______ carbon content? A) 1% B) 2% C) 5%
B) 2%
Which one is the newest member as the five basic material processing families? A) Casting B) Additive manufacturing C) Forming D) Machining E) Joining
B) Additive manufacturing
In the Iron-Carbon Equilibrium Diagram, which one of the following phases exists at a high temperature (>912 degrees C) environment? A) Ferrite B) Austentite C) Cementite
B) Austenite
Which one of the following groups is a better association? A) Open-die forging -> less machining required; Close-die forging -> more machining required B) Close-die forging -> less machining required; Open-die forging -> more machining required
B) Close-die forging -> less machining required; Open-die forging -> more machining required
A steel bar (carbon content known) is heated to very high temperature (above the Austenite temperature) and kept at that temperature for a long time (say, five hours). It then is cooled down to ambient temperature at a constant given cooling rate. Which diagram would you use to find out the crystallization structure of this steel at the ambient temperature? A) Equilibrium diagram B) Continuous-Cooling-Transformation diagram
B) Continuous-Cooling-Transformation diagram
In a two-part sand casting mold, the top part is called _______ and the bottom part is called ________ A) Cope B) Drag
___A___ , ___B___
List two products (parts) that usually need surface hardening.
Shafts and Gears & Bearings
If we let the young's modulus of AISI 4140 steel be 1, which value will most likely be the young's modulus of plastics? A) 0.1 B) 1 C) 10
A) 0.1
If we let the tensile strength of AISI 4140 steel be 1, which value will most likely be the tensile strength of ceramics? A) 0.5 B) 5 C) 50
A) 0.5
In 2013, about _______ of the U.S. Gross Domestic Product (GDP) came from U.S. manufacturing. A) 13% B) 20% C) 30% D) 50%
A) 13%
A steel bar (carbon content known) is heated to a certain temperature and kept at that temperature for a long time (say, five hours). Which diagram would you use to find out the crystallization structure of this steel at that temperature? A) Equilibrium diagram B) Continuous-Cooling-Transformation diagram
A) Equilibrium diagram
When should you wear eye protection? A) Every moment on the job in a machine shop B) Only when you operate a machine
A) Every moment on the job in a machine shop
Which one of the following represents the most common heat treatment processes? A) Hardening B) Softening
A) Hardening
Can the young's modulus of a material be greatly changed by manufacturing processes? A) Yes B) No
A) No
Which one of the following groups is a better association? A) Open-die forging -> no limit in size; Close-die forging -> small to medium size B) Close-die forging -> no limit in size; Open-die forging -> small to medium size
A) Open-die forging -> no limit in size; Close-die forging -> small to medium size
Which of the following groups is a better association? A) Open-die forging -> simple shape; Close-die forging -> complex shape B) Close-die forging -> simple shape; Open-die forging -> complex shape
A) Open-die forging -> simple shape; Close-die forging -> complex shape
If Rule A is marked in 0.5 mm and Rule B is marked in 1 mm, which rule has higher resolution? A) Rule A B) Rule B
A) Rule A
Aluminum is high ductility metal. A) True B) False
A) True
Both brasses and bronzes contain copper. A) True B) False
A) True
Both steels and cast iron are iron-carbon alloys. A) True B) False
A) True
Which one of the following quenching media quenches fastest? A) Water B) Oil C) Air
A) Water
Can the ductility of a material be greatly changed by manufacturing processes? A) Yes B) No
A) Yes
Can the yield strength of a material be greatly changed by manufacturing processes? A) Yes B) No
A) Yes
Do you need to wear eye protection when you just visit a machine shop? A) Yes B) No
A) Yes
Tolerance is usually _______ A) defined by product designers. B) measured on a batch of products.
A) defined by product designers.
Aluminum is _______ to be recycle and reused. A) easy B) hard
A) easy
Generally speaking, when heat treatment of steel parts, the faster the cooling rate, the _______ the parts will be after heat treatment. A) harder B) softer
A) harder
Measuring and gauging is used _______ A) in all phases of manufacturing. B) only on final products.
A) in all phases of manufacturing.
Generally speaking, as tensile strength increases, hardness _______ A) increases. B) decreases.
A) increases.
Normal distribution can be presented as a bell-shaped curve. The location of the curve is determined by _______ A) the mean. B) the variance. C) both mean and variance. D) other parameters instead of mean or variance.
A) the mean.
In annealing, the work-piece needs to be heated to _______ A) upper transformation temperature. B) lower transformation temperature.
A) upper transformation temperature
In normalizing, the work-piece needs to be heated to above _______ A) upper transformation temperature. B) lower transformation temperature.
A) upper transformation temperature.
Generally speaking, which structure has a better ductility (ability to deform with fracture)? A) Body-centered cubic B) Face-centered cubic
B) Face-centered cubic
Cast iron a high ductility metal. A) True B) False
B) False
In a metal deformation (forming) process, the work-piece must be heated first to conducted the operation? A) True B) False
B) False
Which heat treatment process will give the maximum ductility to a machined metal part? A) Tempering B) Full annealing C) Normalizing
B) Full annealing
Which one of the following statements regarding investment casting is FALSE? A) Investment casting is complex process and tends to be rather expensive. B) Investment casting can produce very large parts. C) Extremely complex shapes can be cast as a single piece. D) Patterns are always needed in investment casting.
B) Investment casting can produce very large parts.
Which one of the following heat treatment methods CANNOT improve the treated metal's machinability? A) Annealing B) Quenching C) Normalizing
B) Quenching
_______ is the degree of consistency achieved with a measurement device when the same person uses it to measure a same dimension several times. A) Reproducibility B) Repeatability
B) Repeatability
Which one of the following is NOT a distinct advantage of a general casting part? A) Complex shaper B) Superb surface finish C) Very large parts D) Difficult-to-machine parts
B) Superb surface finish
Why is it hard to bend a paper clip back to shape? A) Young's modulus increased by strain hardening B) Yield strength increased by strain hardening
B) Yield strength increased by strain hardening
Atoms in most metals have a _______ structure. A) molecular B) crystalline C) amorphous
B) crystalline
Typically, the hardness of the steel _______ when tempering temperature increases. A) increases B) decreases
B) decreases
The hot working parts are most likely to have _______ A) isotropic grain structure. B) directional oriented grain structure.
B) direction oriented grain structure.
Which of the following forming processes is "like squeezing toothpaste out of tube." A) rolling B) extrusion C) forging
B) extrusion
Generally speaking, metals have _______ thermal conductivity than plastics. A) lower B) higher
B) higher
Shafts and wheels on a locomotive have to transmit high torque, so they have to be in a _______ fit. A) clearance B) interference C) transition
B) interference
In tempering, the work-piece needs to be heating to below _______ A) upper transformation temperature. B) lower transformation temperature.
B) lower transformation temperature.
Density is part of _______ A) mechanical properties. B) physical properties.
B) physical properties.
The Inspection can be done in two ways: by attributes or by variables. Surface roughness measurement is done by _______ A) attributes. B) variables.
B) variables.
The United States accounts for about _______ of global manufacturing in 2013. A) 5% B) 10% C) 18% D) 50%
C) 18%
Which of the following steel crystallization structure CANNOT be achieve through continuous cooling of eutectoid steel (C = 0.77%) to ambient temperature? A) Pearlite B) Martensite C) Bainite
C) Bainite
In a metal deformation (forming) process, what type(s) deformation would happen? A) Elastic deformation B) Plastic deformation C) Both A and B
C) Both A and B
Which of the following will be the best material to make gage bocks to maintain their high accuracy for everyday use in manufacturing plants? A) Silver B) Ceramic C) Carbide steel
C) Carbide steel
Which one of the following casting methods is not usually applied to cast iron with a low fluidity? A) Sand casting B) Investment casting C) Die casting
C) Die casting
Which of the following order represents the hardness order from hardest to softest) of the structures? A) Pearlite > bainite > martensite B) Martensite > pearlite > bainite C) Martensite > bainite > pearlite D) Bainite > pearlite > martensite
C) Martensite > bainite > pearlite
Which one of the following statements regarding sand casting is FALSE? A) Sand casting is the most popular of the casting processes. B) Sand casting can produce very large parts. C) The dimension precision is the best among all casting processes. D) Patterns are always needed in sand casting.
C) The dimension precision is the best among all casting processes.
Which one of the following is not associated with casting? A) Porosity B) Shrinkage C) Work-hardening D) Melting
C) Work-hardening
Casting is used for _______ A) prototyping. B) mass production. C) both A and B.
C) both A and B.
The size of a pattern is ________ the size of the part to be cast. A) smaller than B) the same as C) larger than
C) larger than
On Boeing 787 airplanes, which type of material is used the most? A) Metal B) Plastics C) Ceramics D) Composites
D) Composites
Which one of the following statements regarding die casting is FALSE? A) Die casting dies are usually made from tool steels and tend to be rather expensive. B) In die casting, to permit removal of the casting, the dies must open, separating into at least two pieces. C) Die casting can typically produce parts with excellent dimensional precision and surface qualities. D) Patterns are always needed in die casting.
D) Patterns are always needed in die casting.
Which one of the following is NOT among the purposes of heat treatment? A) To increase the strength and hardness B) To decrease the strength and hardness C) To harden only the surface of a part without changing the interior properties D) To alter the shape of a part
D) To alter the shape of a part
To study the effects of cooling rate on steel crystallization structure, it is needed to heat the steel into _______ A) pearlite. B) martensite. C) bainite. D) austenite.
D) austenite
What materials are used to mint the $0.25 coins?
Nickel/Copper