Question 1

Sheet-metal bending involves which of the following stresses and strains (two correct answers):

Accepted Answer

A) compressive 
B) shear 
C) tensile 
A) compressive 
B) shear 
C) tensile A , C

Question 2

Which of the following are variations of sheet-metal bending operations (two best answers):

Accepted Answer

A) coining 
B) flanging 
C) hemming 
D) ironing 
E) notching
F)shear spinning
G)trimming
H)tube bending 
A) coining 
B) flanging 
C) hemming 
D) ironing 
E) notching
F)shear spinning
G)trimming
H)tube bending B , C

Question 3

Typical sheet-metal thicknesses are between 0.4 mm (1/64 in) and 6 mm (1/4 in).When thickness exceeds the upper limit of this range, the stock is usually referred to as which one of the following:

Accepted Answer

A) bulk stock 
B) oversized sheet 
C) plate 
D) thick sheet 
A) bulk stock 
B) oversized sheet 
C) plate 
D) thick sheet C

Question 4

As sheet-metal stock hardness increases in a blanking operation, the clearance between punch and die should be

Accepted Answer

A) decreased 
B) increased 
C) remain the same 
A) decreased 
B) increased 
C) remain the same

Question 5

The following are measures of feasibility for several proposed cup-drawing operations.Which of the operations are likely to be feasible (three best answers):

Accepted Answer

A) DR = 1.7 
B) DR = 2.7 
C) r = 0.35 
D) r = 0.65 
E) t/Db = 0.5%
F)t/Db = 2% where DR = drawing ratio r = reduction t = stock thickness and Db = blank diameter 
A) DR = 1.7 
B) DR = 2.7 
C) r = 0.35 
D) r = 0.65 
E) t/Db = 0.5%
F)t/Db = 2% where DR = drawing ratio r = reduction t = stock thickness and Db = blank diameter

Question 6

The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal (one correct answer):

Accepted Answer

A) compressive strength 
B) modulus of elasticity 
C) shear strength 
D) strain rate 
E) tensile strength
F)yield strength 
A) compressive strength 
B) modulus of elasticity 
C) shear strength 
D) strain rate 
E) tensile strength
F)yield strength

Question 7

Which one of the following press types is usually associated with the highest production rates in sheet-metal-stamping operations:

Accepted Answer

A) adjustable bed 
B) open back inclinable 
C) press brake 
D) solid gap 
E) straight sided 
A) adjustable bed 
B) open back inclinable 
C) press brake 
D) solid gap 
E) straight sided

Question 8

Springback in a sheet-metal bending operation is the result of which of the following (one best answer):

Accepted Answer

A) elastic modulus of the metal 
B) elastic recovery of the metal 
C) overbending 
D) overstraining 
E) yield strength of the metal 
A) elastic modulus of the metal 
B) elastic recovery of the metal 
C) overbending 
D) overstraining 
E) yield strength of the metal

Question 9

Which of the following descriptions applies to a V-bending operation as compared to an edge-bending operation (two best answers):

Accepted Answer

A) costly tooling 
B) inexpensive tooling 
C) limited to 90 $\degree$ bends or less 
D) used for high production 
E) used for low production
F)uses a pressure pad to hold down the sheet metal 
A) costly tooling 
B) inexpensive tooling 
C) limited to 90 $\degree$ bends or less 
D) used for high production 
E) used for low production
F)uses a pressure pad to hold down the sheet metal

Question 10

Which of the following processes are classified as high-energy-rate forming processes (two best answers):

Accepted Answer

A) electrochemical bending 
B) electromagnetic forming 
C) electron beam deep drawing 
D) explosive forming 
E) Guerin process
F)hydroforming
G)redrawing
H)shear spinning 
A) electrochemical bending 
B) electromagnetic forming 
C) electron beam deep drawing 
D) explosive forming 
E) Guerin process
F)hydroforming
G)redrawing
H)shear spinning

Question 11

In a sheet-metal cutting operation used to produce a flat part with a hole in the center, the part itself is called a blank, and the scrap piece that is cut out to make the hole is called a slug:

Accepted Answer

A) True 
 B)False

Question 12

Most sheet metalworking operations are performed as which one of the following:

Accepted Answer

A) cold working 
B) hot working 
C) warm working 
A) cold working 
B) hot working 
C) warm working

Question 13

The holding force in drawing is most likely to be

Accepted Answer

A) greater than 
B) equal to 
C) less than the maximum drawing force 
A) greater than 
B) equal to 
C) less than the maximum drawing force

Question 14

Most sheet-metal operations are performed on machine tools called stamping presses, and the associated tooling is called a punch and die:

Accepted Answer

A) True 
 B)False

Question 15

A circular sheet-metal slug produced in a hole punching operation will have the same diameter as the

Accepted Answer

A) die opening 
B) punch 
A) die opening 
B) punch

Question 16

Sheet metalworking includes both forming and cutting operations:

Accepted Answer

A) True 
 B)False

Question 17

Which one of the following processes uses a thick rubber pad to form sheet metal over a positive form block:

Accepted Answer

A) embossing 
B) Guerin process 
C) hydroforming 
D) lancing 
E) stretch forming 
A) embossing 
B) Guerin process 
C) hydroforming 
D) lancing 
E) stretch forming

Question 18

In a blanking die, the device that clears the sheet metal from the punch after blanking is called which one of the following:

Accepted Answer

A) clearance device 
B) punch holder 
C) stop 
D) stripper 
E) upper shoe 
A) clearance device 
B) punch holder 
C) stop 
D) stripper 
E) upper shoe

Question 19

Which one of the following is the best definition of bend allowance:

Accepted Answer

A) amount by which the die is larger than the punch 
B) amount of elastic recovery experienced by the metal after bending 
C) safety factor used in calculating bending force 
D) length before bending of the straight sheet-metal section to be bent 
A) amount by which the die is larger than the punch 
B) amount of elastic recovery experienced by the metal after bending 
C) safety factor used in calculating bending force 
D) length before bending of the straight sheet-metal section to be bent

Question 20

Which one of the following stamping dies is the most complicated:

Accepted Answer

A) blanking die 
B) combination die 
C) compound die 
D) edge-bending die 
E) progressive die
F)V bending die 
A) blanking die 
B) combination die 
C) compound die 
D) edge-bending die 
E) progressive die
F)V bending die

Exam 16: Sheet Metalworking

Sheet-metal bending involves which of the following stresses and strains (two correct answers):

Which of the following are variations of sheet-metal bending operations (two best answers):

Typical sheet-metal thicknesses are between 0.4 mm (1/64 in) and 6 mm (1/4 in).When thickness exceeds the upper limit of this range, the stock is usually referred to as which one of the following:

As sheet-metal stock hardness increases in a blanking operation, the clearance between punch and die should be

The following are measures of feasibility for several proposed cup-drawing operations.Which of the operations are likely to be feasible (three best answers):

The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal (one correct answer):

Which one of the following press types is usually associated with the highest production rates in sheet-metal-stamping operations:

Springback in a sheet-metal bending operation is the result of which of the following (one best answer):

Which of the following descriptions applies to a V-bending operation as compared to an edge-bending operation (two best answers):

Which of the following processes are classified as high-energy-rate forming processes (two best answers):

In a sheet-metal cutting operation used to produce a flat part with a hole in the center, the part itself is called a blank, and the scrap piece that is cut out to make the hole is called a slug:

Most sheet metalworking operations are performed as which one of the following:

The holding force in drawing is most likely to be

Most sheet-metal operations are performed on machine tools called stamping presses, and the associated tooling is called a punch and die:

A circular sheet-metal slug produced in a hole punching operation will have the same diameter as the

Sheet metalworking includes both forming and cutting operations:

Which one of the following processes uses a thick rubber pad to form sheet metal over a positive form block:

In a blanking die, the device that clears the sheet metal from the punch after blanking is called which one of the following:

Which one of the following is the best definition of bend allowance:

Which one of the following stamping dies is the most complicated:

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

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