© Mikell P. Groover 2013
Chapter 16 SHEET METALWORKING
Multiple Choice Quiz
There are 26 correct answers in this multiple choice quiz (some questions have multiple answers
that are correct). To achieve a perfect score on the quiz, all correct answers must be given. Each
correct answer is worth 1 point. Each omitted answer or wrong answer reduces the score by 1
point. Percentage score on the quiz is based on the total number of correct answers.
16.1
Sheet metalworking includes both forming and cutting operations: (a) true or (b) false?
16.2
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: (a) bulk stock, (b) oversized sheet, (c) plate, or (d) thick sheet?
16.3
Most sheet metalworking operations are performed as which one of the following: (a) cold
working, (b) hot working, or (c) warm working?
16.4
Most sheet-metal operations are performed on machine tools called stamping presses, and
the associated tooling is called a punch and die: (a) true or (b) false?
16.5
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: (a) true or (b) false?
16.6
As sheet-metal stock hardness increases in a blanking operation, the clearance between
punch and die should be (a) decreased, (b) increased, or (c) remain the same?
16.7
A circular sheet-metal slug produced in a hole punching operation will have the same
diameter as the (a) die opening or (b) punch?
16.8
The cutting force in a sheet-metal blanking operation depends on which mechanical
property of the metal (one correct answer): (a) compressive strength, (b) modulus of
elasticity, (c) shear strength, (d) strain rate, (e) tensile strength, or (f) yield strength?
16.9
Which of the following descriptions applies to a V-bending operation as compared to an
edge-bending operation (two best answers): (a) costly tooling, (b) inexpensive tooling, (c)
limited to 90 bends or less, (d) used for high production, (e) used for low production, and
(f) uses a pressure pad to hold down the sheet metal?
16.10 Sheet-metal bending involves which of the following stresses and strains (two correct
answers): (a) compressive, (b) shear, and (c) tensile?
16.11 Which one of the following is the best definition of bend allowance: (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, or (d) length before
bending of the straight sheet-metal section to be bent?
16.12 Springback in a sheet-metal bending operation is the result of which of the following (one
best answer): (a) elastic modulus of the metal, (b) elastic recovery of the metal, (c)
overbending, (d) overstraining, or (e) yield strength of the metal?
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students enrolled in courses for which the textbook has been adopted. Any other reproduction or translation of this work beyond that permitted
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© Mikell P. Groover 2013
16.13 Which of the following are variations of sheet-metal bending operations (two best
answers): (a) coining, (b) flanging, (c) hemming, (d) ironing, (e) notching, (f) shear
spinning, (g) trimming, and (h) tube bending?
16.14 The following are measures of feasibility for several proposed cup-drawing operations.
Which of the operations are likely to be feasible (three best answers): (a) DR = 1.7, (b) DR
= 2.7, (c) r = 0.35, (d) r = 0.65, (e) t/Db = 0.5%, and (f) t/Db = 2%, where DR = drawing
ratio, r = reduction, t = stock thickness, and Db = blank diameter?
16.15 The holding force in drawing is most likely to be (a) greater than, (b) equal to, or (c) less
than the maximum drawing force?
16.16 Which one of the following processes uses a thick rubber pad to form sheet metal over a
positive form block: (a) embossing, (b) Guerin process, (c) hydroforming, (d) lancing, or
(e) stretch forming?
16.17 Which one of the following stamping dies is the most complicated: (a) blanking die, (b)
combination die, (c) compound die, (d) edge-bending die, (e) progressive die, or (f)
V-bending die?
16.18 In a blanking die, the device that clears the sheet metal from the punch after blanking is
called which one of the following: (a) clearance device, (b) punch holder, (c) stop, (d)
stripper, or (e) upper shoe?
16.19 Which one of the following press types is usually associated with the highest production
rates in sheet-metal-stamping operations: (a) adjustable bed, (b) open back inclinable, (c)
press brake, (d) solid gap, or (e) straight-sided?
16.20 Which of the following processes are classified as high-energy-rate forming processes (two
best answers): (a) electrochemical bending, (b) electromagnetic forming, (c) electron beam
deep drawing, (d) explosive forming, (e) Guerin process, (f) hydroforming, (g) redrawing,
and (h) shear spinning?
Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to
students enrolled in courses for which the textbook has been adopted. Any other reproduction or translation of this work beyond that permitted
by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.