Question 1

A ceramic material can be defined as an organic compound consisting of a metal or semimetal and one or more nonmetals:

Accepted Answer

A) True 
 B)False

Question 2

Which one of the following is the chemical formula for the repeating unit in polyethylene:

Accepted Answer

A) CH2 
B) C2H4 
C) C3H6 
D) C5H8 
E) C8H8 
A) CH2 
B) C2H4 
C) C3H6 
D) C5H8 
E) C8H8

Question 3

Which one of the following is not a common alloying ingredient in steel:

Accepted Answer

A) chromium 
B) manganese 
C) nickel 
D) vanadium 
E) zinc 
A) chromium 
B) manganese 
C) nickel 
D) vanadium 
E) zinc

Question 4

Which of the following contains significant amounts of aluminum oxide (three correct answers):

Accepted Answer

A) alumina 
B) bauxite 
C) corundum 
D) feldspar 
E) kaolinite
F)quartz
G)sandstone
H)silica 
A) alumina 
B) bauxite 
C) corundum 
D) feldspar 
E) kaolinite
F)quartz
G)sandstone
H)silica

Question 5

Which one of the following reinforcing geometries offers the greatest potential for improving strength and stiffness in the resulting composite material:

Accepted Answer

A) continuous fibers 
B) discontinuous fibers 
C) flakes 
D) particles 
E) infiltrated phase 
A) continuous fibers 
B) discontinuous fibers 
C) flakes 
D) particles 
E) infiltrated phase

Question 6

Most plastic molding compounds include fillers and therefore can be classified as polymer matrix composites:

Accepted Answer

A) True 
 B)False

Question 7

The strength and hardness of steel increases as carbon content

Accepted Answer

A) increases 
B) decreases 
A) increases 
B) decreases

Question 8

Which of the following metals is noted for its good electrical conductivity (one best answer):

Accepted Answer

A) copper 
B) iron 
C) nickel 
D) tungsten 
A) copper 
B) iron 
C) nickel 
D) tungsten

Question 9

The predominant phase in the iron-carbon alloy system for a composition with 99% iron at room temperature is which one of the following:

Accepted Answer

A) austenite 
B) cementite 
C) delta 
D) ferrite 
E) gamma 
A) austenite 
B) cementite 
C) delta 
D) ferrite 
E) gamma

Question 10

Traditional brass is an alloy of which of the following metallic elements (two correct answers):

Accepted Answer

A) aluminum 
B) copper 
C) gold 
D) tin 
E) zinc 
A) aluminum 
B) copper 
C) gold 
D) tin 
E) zinc

Question 11

The reinforcing phase is the matrix within which the secondary phase is imbedded:

Accepted Answer

A) True 
 B)False

Question 12

Which one of the following is the most important cast iron commercially:

Accepted Answer

A) ductile cast iron 
B) gray cast iron 
C) malleable iron 
D) white cast iron 
A) ductile cast iron 
B) gray cast iron 
C) malleable iron 
D) white cast iron

Question 13

Glass ceramics are polycrystalline ceramic structures that have been transformed into a mostly glassy state:

Accepted Answer

A) True 
 B)False

Question 14

Which of the following materials are used as fibers in fiber-reinforced plastics (four best answers):

Accepted Answer

A) aluminum oxide 
B) boron 
C) cast iron 
D) E-glass 
E) epoxy
F)Kevlar 49
G)polyester
H)silicon 
A) aluminum oxide 
B) boron 
C) cast iron 
D) E-glass 
E) epoxy
F)Kevlar 49
G)polyester
H)silicon

Question 15

The difference between traditional ceramics and new ceramics is that most traditional ceramics are based primarily on silicates whereas the most new ceramics are based on oxides, carbides, or nitrides:

Accepted Answer

A) True 
 B)False

Question 16

Which one of the three polymer types involves the greatest amount of cross-linking:

Accepted Answer

A) elastomers 
B) thermoplastics 
C) thermosets 
A) elastomers 
B) thermoplastics 
C) thermosets

Question 17

In the Boeing 787 Dreamliner, what percentage of the aircraft consists of composite materials (two correct answers):

Accepted Answer

A) 12% by volume 
B) 20% by volume 
C) 50% by volume 
D) 80% by volume 
E) 12% by weight
F)20% by weight
G)50% by weight
H)80% by weight 
A) 12% by volume 
B) 20% by volume 
C) 50% by volume 
D) 80% by volume 
E) 12% by weight
F)20% by weight
G)50% by weight
H)80% by weight

Question 18

A branched molecular structure is stronger in the solid state and more viscous in the molten state than a linear structure for the same polymer:

Accepted Answer

A) True 
 B)False

Question 19

Which one of the following polymer types are most commonly used in fiber-reinforced polymer matrix composites:

Accepted Answer

A) elastomers 
B) thermoplastics 
C) thermosets 
A) elastomers 
B) thermoplastics 
C) thermosets

Question 20

Which of the following polymers are normally thermoplastic (three best answers):

Accepted Answer

A) acrylics 
B) nylon 
C) phenolics 
D) polychloroprene 
E) polyethylene
F)polyisoprene
G)Polyurethane 
A) acrylics 
B) nylon 
C) phenolics 
D) polychloroprene 
E) polyethylene
F)polyisoprene
G)Polyurethane

Exam 5: Engineering Materials

A ceramic material can be defined as an organic compound consisting of a metal or semimetal and one or more nonmetals:

Which one of the following is the chemical formula for the repeating unit in polyethylene:

Which one of the following is not a common alloying ingredient in steel:

Which of the following contains significant amounts of aluminum oxide (three correct answers):

Which one of the following reinforcing geometries offers the greatest potential for improving strength and stiffness in the resulting composite material:

Most plastic molding compounds include fillers and therefore can be classified as polymer matrix composites:

The strength and hardness of steel increases as carbon content

Which of the following metals is noted for its good electrical conductivity (one best answer):

The predominant phase in the iron-carbon alloy system for a composition with 99% iron at room temperature is which one of the following:

Traditional brass is an alloy of which of the following metallic elements (two correct answers):

The reinforcing phase is the matrix within which the secondary phase is imbedded:

Which one of the following is the most important cast iron commercially:

Glass ceramics are polycrystalline ceramic structures that have been transformed into a mostly glassy state:

Which of the following materials are used as fibers in fiber-reinforced plastics (four best answers):

The difference between traditional ceramics and new ceramics is that most traditional ceramics are based primarily on silicates whereas the most new ceramics are based on oxides, carbides, or nitrides:

Which one of the three polymer types involves the greatest amount of cross-linking:

In the Boeing 787 Dreamliner, what percentage of the aircraft consists of composite materials (two correct answers):

A branched molecular structure is stronger in the solid state and more viscous in the molten state than a linear structure for the same polymer:

Which one of the following polymer types are most commonly used in fiber-reinforced polymer matrix composites:

Which of the following polymers are normally thermoplastic (three best answers):

Introduction and Overview of Manufacturing

The Nature of Materials

Mechanical Properties of Materials

Physical Properties of Materials

Dimensions, Surfaces, and Their Measurement

Fundamentals of Metal Casting

Metal Casting Processes

Glassworking

Shaping Processes for Plastics

Processing of Polymer Matrix Composites and Rubber

Powder Metallurgy

Processing of Ceramics and Cermets

Fundamentals of Metal Forming

Bulk Deformation Processes in Metal Workiing

Sheet Metalworking

Theory of Metal Machining

Machining Operations and Machine Tools

Cutting Tool Technology

Economic and Product Design Considerations

Grinding and Other Abrasive Processes

Nontraditional Machining and Thermal Cutting

Heat Treatment of Metals

Surface Processing Operations

Fundamentals of Welding

Welding Processes

Brazing, Soldering, and Adhesive Bonding

Mechanical Assembly

Rapid Prototyping and Additive Manufacturing

Processing of Integrated Circuits

Electronics Assembly and Packaging

Microfabrication Technologies

Nanofabrication Technologies

Automation Technologies for Manufacturing Systems

Integrated Manufacturing Systems

Process Planning and Production Control

Quality Control and Inspection

Filters