201D

Question 1

why is limestone added to a blast furnace?

A. to act as a flux to remove impurities
B. to increase carbon content of the pig iron
C. to reduce the time needed to melt iron ore
D. to reduce the melting point of the iron ore

Answer 1

A. to act as a flux to remove impurities

Question 2

the blast furnace is loaded with which material?

A. silicon, iron ore and coke
B. iron ore, coke and limestone
C. Sulphur, coke and limestone
D. iron ore Sulphur and limestone

Answer 2

B. iron ore, coke and limestone

Question 3

In relations to steel, which what is coke?

A. an element mined from from the earth composed
B. a fuel source made by removing moisture from coal
C. a sedimentary rock used as a flux in the blast furnace.
D. a popular soft drink

Answer 3

B. a fuel source made by removing moisture from coal

Question 4

Cast iron has a high carbon content of 1.7% to 4.5%. it is refined from pig iron using what?

A. the basic oxygen process
B. an electric arc furnace
C. a blast furnace
D. a copula furnace or an induction furnace

Answer 4

D. a copula furnace or an induction furnace

Question 5

with the basic oxygen steel-steelmaking process, of blowing in oxygen?

A.to combine with the carbon
B.to oxidize the manganese
C. to turn sulpher into slag
D. to unite with the pig iron

Answer 5

A.to combine with the carbon

Question 6

what materials are loaded into the basic oxygen steel-making vessel?

A. iron ore, limestone and coke
B. limestone and scrap steel
iron ore, coke and scrap steel
C. iron ore, coke and scrap steel
D. scrap steel and pig iron

Answer 6

D. scrap steel and pig iron

Question 7

which steel-making process is commonly used for making high quality alloy and tool steels?

A. a blast furnace
B. a basic oxygen furnace
C. an electric arc furnace
D. a copula furnace

Answer 7

C. an electric arc furnace

Question 8

what is the normal charge for the electric furnace steel-making process?

A. iron ore, coke and limestone
B. carefully selected scrap metals
C. molten iron and limestone
D. iron ore and scrap steel

Answer 8

B. carefully selected scrap metals

Question 9

what is the end product from the blast furnace?

A. Stainless steel
B. cast iron
C. iron ore
D. pig iron

Answer 9

D. pig iron

Question 10

What is the continuous casting process?

A. where molten metal is solidified into billets, blooms, blanks, rounds or slabs
B. where pig iron is refined inti cast iron
C.where molten steel is poured into moulds
D. where iron ore is turned into pig iron

Answer 10

A. where molten metal is solidified into billets, blooms, blanks, rounds or slabs

Question 11

pig iron is refined to produce either:

A. cast iron or steel
B. brass or bronze
C. iron or carbon
D. iron ore or carbon

Answer 11

A. cast iron or steel

Question 12

what is the range of carbon content for cast irons

A. 0.5% to 1.5%
B. 1.5% to 2.5%
C. 2% to 4.5%
D. 4.0 to 7.0%

Answer 12

C. 2% to 4.5%

Question 13

which type of steel has a shiny surface?
A Hot rolled
B Cold rolled

Answer 13

B Cold rolled

Question 14

what is the approximate carbon content of low carbon steel?

A. 0.05% to 0.30%
B. 0.30% to 0.45%
C. 0.45% to 7.5%
D. 0.75% to 1.50%

Answer 14

A. 0.05% to 0.30%

Question 15

which metal leaves the steel-making furnace and is poured into a mold that is in the shape of the final project

A. pig iron
B. cast steel
C. iron ore
D. limestone

Answer 15

B. cast steel

Question 16

based on the deoxidization process, what are the four classes of steel?

A. low carbon, medium carbon, high carbon
B. rimmed, capped, semi- killed, killed
C. ferritic, austenitic, martensitic
D. mild, alloy, heat treatable, extra low carbon

Answer 16

B. rimmed, capped, semi- killed, killed

Question 17

which type of steel is of the highest quality?

A. rimmed
B. semi-killed
C. killed
D. capped

Answer 17

C. killed

Question 18

why is a cap or seal used in making capped steel?

A. to fully deoxidize the molten steel
B. to decrease the cooling rate and help prevent gas voids
C. to increase the cooling rate and decrease deoxidize the steel
D. to increase the cooling rate and fully deoxidize.

Answer 18

B. to decrease the cooling rate and help prevent gas voids

Question 19

which type of steel is not deoxidized?

A. rimmed
B. semi-killed
C. killed
D. capped

Answer 19

A. rimmed

Question 20

which is true of a semi-killed steel?

A. no deoxidants are added
B. they are fully deoxidized
C. a cap or seal is added to the top
D. a small amount of deoxidizer is added

Answer 20

D. a small amount of deoxidizer is added

Question 21

which combination best describes the three essential raw materials used in a blast furnace?

A. iron ore, clay and coke
B. iron ore, limestone and coke
C. lime stone, sand and coke
D. coke, scrap metal, and iron powder

Answer 21

B. iron ore, limestone and coke

Question 22

what is the primary function of a coke in a blast furnace operation?

A. acts as a coolant to regulate furnace temp
B. combines with impurities to form sag
C. serves as both a fuel and reducing agent to extract iron
D. adds strength to final iron product

Answer 22

C. serves as both a fuel and reducing agent to extract iron

Question 23

what is the purpose of adding limestone to the blast furnace?

A. to reduce the melting point of iron
B. to form a protective layer over molten iron
C. to bind with impurities and form slag
D. to insulate the furnace walls from heat loss

Answer 23

C. to bind with impurities and form slag

Question 24

what is the most accurate description of pig iron.

A. a highly refined iron alloy used in tool making
B. Iron with a carbon content around 4% produced in a blast furnace
C. a pure form of iron extracted directly from ore
D. steel that has been dioxide using aluminum

Answer 24

B. Iron with a carbon content around 4% produced in a blast furnace

Question 25

after production, pig iron typically under goes which following processes? A. casting into molds for use in buildings B. cooling and direct use as rebar C. further refining in basic oxygen or electric arc furnaces D. grinding and chemical analysis

Answer 25

C. further refining in basic oxygen or electric arc furnaces

Question 26

which of the following best differentials an induction furnace from a cupola furnace? A. induction furnaces use magnetic fields to melt metal; cupola furnaces rely on coke combustion B. Cupla furnaces are used only for non-ferrous metals C. induction furnaces produce more slag than cupola furnaces D. cupola furnaces melt metal using arc discharge

Answer 26

A. induction furnaces use magnetic fields to melt metal; cupola furnaces rely on coke combustion

Question 27

what is the melting mechanism of an induction furnace? A. Radiant heat from gas burners B. magnetic induction generating eddy currents in the metal C. heat generated from carbon rods D. Resistance heat from metal contact plates

Answer 27

B. magnetic induction generating eddy currents in the metal

Question 28

which materials are typically charged into a basic oxygen furnace (BOF)? A. molten pig iron and scrap steel with fluxes like limestone B. only scrap steel and aluminum C. zinc, lead and other non-ferrous metals D. coke and iron powder

Answer 28

A. molten pig iron and scrap steel with fluxes like limestone

Question 29

how is steel refined in a basic oxygen furnace? A. by blowing nitrogen through molten iron B. by cooling molten steel with water C. by injecting oxygen to oxidize impurities D. by mixing high-carbon graphite

Answer 29

C. by injecting oxygen to oxidize impurities

Question 30

what is the role of graphite electrodes in an electric arc furnace? A. to insulate the walls of the furnace B.to conduct electricity and generate heat via electric arcs C. to stir molten metals D. to supply extra carbon and increase strength

Answer 30

B.to conduct electricity and generate heat via electric arcs

Question 31

which shapes are commonly formed through continuous casting? A. screws, bolts and gears. B. billets, blooms and slabs C. tubes, wires and rods D. disc sheets and ingots

Answer 31

B. billets, blooms and slabs

Question 32

why is continuous casting commonly used in steel production? A. it cools faster and improves welds B. it allows molten steel to solidify into predefined shapes efficiently C. it removes impurities and gas bubbles from steel D. it eliminates the need for rolling mills

Answer 32

B. it allows molten steel to solidify into predefined shapes efficiently

Question 33

what is the primary differences from hot rolling and cold rolling of metals? A. cold rolling increases grain sizes, and hot rolling decreases it B. cold rolling is used for thick sheets, hot rolling is used for wires C. hot rolling is done above recrystallization temperatures, cold rolling below it D. hot rolling always produces a shinier surface finish

Answer 33

C. hot rolling is done above recrystallization temperatures, cold rolling below it

Question 34

which feature best characterizes grey cast iron? A contains nodular graphite for strength B has a flaky graphite which improves machinability C is ductile and resistant to bending D produces a white, brittle fracture when broken

Answer 34

B has a flaky graphite which improves machinability

Question 35

what distinguishes killed steel from rimmed steal? A. killed steel forms a rim of slag; rimmed steel does not B. killed steel is partially deoxidized; rimmed steel is fully deoxidized C Killed steel has no gas evolution; rimmed steel has gas evolution during solidification D. rimmed steel is more uniform in composition

Answer 35

C Killed steel has no gas evolution; rimmed steel has gas evolution during solidification

Question 36

What is the temperature of the coke inside a blast furnace? A. 1000oC(1832oF) B. 1500oC(2732oF) C. 2000oC(3632oF) D. 2500oC(4532oF)

Answer 36

C. 2000oC(3632oF)

Question 37

What is the final product of the blast furnace? A. cast iron B. pig iron C. stainless steel D. low carbon steel

Answer 37

B. pig iron

Question 38

What are the three raw materials used to produce iron? A. coke, limestone, carbon B. hematite, iron ore, coke C. limestone, carbon, iron ore D. iron ore, coke, limestone

Answer 38

D. iron ore, coke, limestone

Question 39

What does the heat from the Blast furnace change limestone into? A. calcium oxide and carbon monoxide B. calcium oxide and oxygen C. calcium oxide and carbon dioxide D. calcium oxide and nitrogen

Answer 39

C. calcium oxide and carbon dioxide

Question 40

Why are killed steels used for structural steel and forgings? A. no deoxidizers are added to the steel B. ingots are degassed and uniform throughout C. carbon content is maintained to levels below .08% D. nodules of carbon are evenly dispersed in matrix

Answer 40

B. ingots are degassed and uniform throughout

Question 41

If manganese or cerium is added to a cast iron melt, what will it produce? A. gray cast iron B. white cast iron C. malleable cast iron D. nodular cast iron

Answer 41

D. nodular cast iron

Question 42

Which of the following properties are true of grey cast iron? A. low wear resistance B. excellent wear resistance C. difficult to cast into intricate shapes D. ductile

Answer 42

B. excellent wear resistance

Question 43

In its natural state, what is iron ore found as? A. ferrite B. pig iron C. iron oxide D. rock

Answer 43

C. iron oxide

Question 44

Which cast iron will bend before it breaks? A. nodular cast iron B. white cast iron C. gray cast iron D. all of the above

Answer 44

A. nodular cast iron

Question 45

What is the basic oxygen steel making furnace charged with? A. limestone, coke, iron ore B. limestone, coke, hematite C. hematite, coke, scrap steel D. pig iron and scrap steel

Answer 45

A. limestone, coke, iron ore

Question 46

What type of atmosphere exists inside a working blast furnace? A. carbon dioxide, carbon monoxide, and oxygen B. carbon monoxide, nitrogen, and oxygen C. nitrogen, oxygen and sulphur D. oxygen, sulphur dioxide, and carbon dioxide

Answer 46

A. carbon dioxide, carbon monoxide, and oxygen

Question 47

What is the percentage of carbon usually present in killed steel? A. minimum of 0.25% B. maximum of 0.25% C. minimum of 0.35% D. maximum of 0.35%

Answer 47

A. minimum of 0.25%

Question 48

Which type of furnace has an alternating current going through a coil that is wrapped around the vessel shell? A. Cupola Furnace B. Electric Arc Furnace C. Basic Oxygen Steel-Making Furnace D. Induction Furnace

Answer 48

D. Induction Furnace

Question 49

When white cast iron is heat treated from 815o to 900oC (1500o to 1650oF) and cooled slowly, what is the product? A. tool steels B. malleable cast iron C. gray cast iron D. wrought iron

Answer 49

B. malleable cast iron

Question 50

What is the main product of the Cupola and Induction furnaces? A. Pig Iron B. Cast Iron C. Steel D. Aluminum

Answer 50

B. Cast Iron

Question 51

What are the most common type of ore's used in steel production? A. Magnetite B. Coke C. Hematite D. Both A and C

Answer 51

D. Both A and C

Question 52

What can pig iron be refined into? A. brass or bronze B. iron or carbon C. cast iron or steel D. hematite or magnetite

Answer 52

C. cast iron or steel

Question 53

What is the percentage of carbon present in rimmed steel? A. 0.015% B. 0.15% C. 0.02% D. 0.20%

Answer 53

B. 0.15%

Question 54

iron makes up ________ or more of the composition steel. A 65% B 75% C 85% D 95%

Answer 54

95%

Question 55

tool steels are difficult to weld because of the: A low carbon content B high carbon content C lack of deoxidizers D shiny finish

Answer 55

B high carbon content

Question 56

which alloy in the range of 0.1% - 0.15% improves machining? A. silicon B copper C phosphorus D Sulphur

Answer 56

D Sulphur