Question 1

A machinability rating greater than 1.0 indicates that the work material is

Accepted Answer

A) easier to machine than the base metal 
B) more difficult to machine than the base metal where the base metal has a rating = 1.0 
A) easier to machine than the base metal 
B) more difficult to machine than the base metal where the base metal has a rating = 1.0 A

Question 2

When selecting the appropriate cutting conditions for a given machining operation, which of the following parameters should be selected before the other:

Accepted Answer

A) cutting speed 
B) feed 
A) cutting speed 
B) feed B

Question 3

When cutting a ductile work material, an increase in cutting speed will generally

Accepted Answer

A) degrade surface finish which means a higher value of Ra 
B) improve surface finish which means a lower value of Ra 
A) degrade surface finish which means a higher value of Ra 
B) improve surface finish which means a lower value of Ra B

Question 4

A high tooling cost and/or tool change time will tend to

Accepted Answer

A) decrease 
B) have no effect on 
C) increase the cutting speed for minimum cost 
A) decrease 
B) have no effect on 
C) increase the cutting speed for minimum cost

Question 5

Of the various methods for testing machinability, which one of the following is the most important:

Accepted Answer

A) cutting forces 
B) cutting temperature 
C) horsepower consumed in the operation 
D) surface roughness 
E) tool life
F)tool wear 
A) cutting forces 
B) cutting temperature 
C) horsepower consumed in the operation 
D) surface roughness 
E) tool life
F)tool wear

Question 6

Which cutting speed is always lower for a given machining operation:

Accepted Answer

A) cutting speed for maximum production rate 
B) cutting speed for minimum cost 
A) cutting speed for maximum production rate 
B) cutting speed for minimum cost

Question 7

Which of the following criteria are generally recognized to indicate good machinability (four best answers):

Accepted Answer

A) ease of chip disposal 
B) good surface finish 
C) high cutting temperatures 
D) high power requirements 
E) long tool life
F)low cutting forces
G)zero shear plane angle 
A) ease of chip disposal 
B) good surface finish 
C) high cutting temperatures 
D) high power requirements 
E) long tool life
F)low cutting forces
G)zero shear plane angle

Question 8

Which one of the following operations is generally capable of the best surface finishes, which means the lowest value of Ra:

Accepted Answer

A) broaching 
B) drilling 
C) end milling 
D) planing 
E) turning 
A) broaching 
B) drilling 
C) end milling 
D) planing 
E) turning

Question 9

In general, which one of the following materials has the highest machinability:

Accepted Answer

A) aluminum 
B) cast iron 
C) copper 
D) low carbon steel 
E) stainless steel
F)titanium alloys
G)unhardened tool steel 
A) aluminum 
B) cast iron 
C) copper 
D) low carbon steel 
E) stainless steel
F)titanium alloys
G)unhardened tool steel

Question 10

The actual surface roughness Ra almost always has a lower value than the ideal surface roughness Ri:

Accepted Answer

A) True 
 B)False

Question 11

Which one of the following operations is generally capable of the closest tolerances:

Accepted Answer

A) broaching 
B) drilling 
C) end milling 
D) planing 
E) sawing 
A) broaching 
B) drilling 
C) end milling 
D) planing 
E) sawing

Question 12

Which of the following are geometric factors in a machining operation that determine the surface geometry of the work part (three best answers):

Accepted Answer

A) cutting speed 
B) depth of cut 
C) ductility of the work material 
D) feed 
E) nose radius on the tool
F)type of machining operation 
A) cutting speed 
B) depth of cut 
C) ductility of the work material 
D) feed 
E) nose radius on the tool
F)type of machining operation

Question 13

Which of the following time components in the average production machining cycle is affected by cutting speed (two correct answers):

Accepted Answer

A) average tool change time per piece 
B) part loading and unloading time 
C) setup time for the machine tool 
D) time the tool is engaged in cutting 
A) average tool change time per piece 
B) part loading and unloading time 
C) setup time for the machine tool 
D) time the tool is engaged in cutting

Exam 20: Economic and Product Design Considerations

A machinability rating greater than 1.0 indicates that the work material is

When selecting the appropriate cutting conditions for a given machining operation, which of the following parameters should be selected before the other:

When cutting a ductile work material, an increase in cutting speed will generally

A high tooling cost and/or tool change time will tend to

Of the various methods for testing machinability, which one of the following is the most important:

Which cutting speed is always lower for a given machining operation:

Which of the following criteria are generally recognized to indicate good machinability (four best answers):

Which one of the following operations is generally capable of the best surface finishes, which means the lowest value of Ra:

In general, which one of the following materials has the highest machinability:

The actual surface roughness Ra almost always has a lower value than the ideal surface roughness Ri:

Which one of the following operations is generally capable of the closest tolerances:

Which of the following are geometric factors in a machining operation that determine the surface geometry of the work part (three best answers):

Which of the following time components in the average production machining cycle is affected by cutting speed (two correct answers):

Introduction and Overview of Manufacturing

The Nature of Materials

Mechanical Properties of Materials

Physical Properties of Materials

Engineering 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

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

Which one of the following operations is generally capable of the best surface finishes, which means the lowest value of R_a:

The actual surface roughness R_a almost always has a lower value than the ideal surface roughness R_i: