Exam 2 Multiple Choice
turning
A single-point cutting tool is used for which one of the following operations: (a) drilling, (b) milling, or (c) turning?
cold working
Most sheet metalworking operations are performed as which one of the following: (a) cold working, (b) hot working, or (c) warm working
direct extrusion
In which of the following extrusion operations is friction a factor in determining the extrusion force? direct extrusion indirect extrusion
increase flow stress
Increasing strain rate tends to have which one of the following effects on flow stress during hot forming of metal? decreases flow stress has no effect increases flow stress
true
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?
true
Most vertical boring machines are equipped for both turning and boring and are used for large, heavy work parts with large diameters: (a) true or (b) false?
compressive tensile
Sheet-metal bending involves which of the following stresses and strains (two correct answers): (a) compressive, (b) shear, and (c) tensile?
shear strength
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?
false
The distinguishing feature between a drilling fixture and a drill jig is that the fixture provides a means of guiding the tool during the hole-making operation: (a) true or (b) false?
a through hole
When the drill bit in a drilling operation exits the opposite side of the work, the resulting hole is called which one of the following: (a) a blind hole or (b) a through hole?
external cylinder
With which one of the following geometric forms is the turning operation most closely associated: (a) external cylinder, (b) flat plane, (c) round hole, (d) screw threads, or (e) sphere?
true
sheet metalworking includes both forming and cutting operations? true false
low volume to area ratio
which of the following is typical of the starting work geometry in sheet metal processes
average flow stress
which of the following stress or strength parameters is used in the computation of rolling force? average flow stress compression strength final flow stress tensile strength yield strength
plain milling slab milling straddle milling
Which of the following are classified as peripheral milling rather than face milling (three best answers): (a) end milling, (b) plain milling, (c) pocket milling, (d) slab milling, (e) straddle milling, and (f) surface contouring?
high ductility and low yield strength
Which of the following are desirable properties of the work material in metal forming? (2) high ductility high tensile strength high yield strength low ductility low yield strength
contour turning profile milling
Which of the following are examples of generating the workpart geometry in machining, as opposed to forming the geometry (two best answers): (a) broaching, (b) contour turning, (c) drilling, (d) profile milling, and (e) thread cutting?
bar drawing extrusion forging
Which of the following are the three basic bulk deformation processes in metal forming? bar drawing blanking deep drawing extrusion forging stamping
drilling milling turning
Which of the following are the three most common machining operations: (a) broaching, (b) drilling, (c) lapping, (d) milling, (e) planing, (f) shaping, or (g) turning?
flanging hemming
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?
broach
Which one of the following cutting tools cannot be used on a turret lathe: (a) broach, (b) cutoff tool, (c) drill bit, (d) single-point turning tool, or (e) threading tool?
length before bending of the straight sheet metal section to be bent
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?
Guerin process
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?
progressive die
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?
screw machine
Which one of the following turning machines permits very long bar stock to be used: (a) chucking machine, (b) engine lathe, (c) screw machine, (d) speed lathe, or (e) turret lathe?
die opening
A circular sheet-metal slug produced in a hole punching operation will have the same diameter as the (a) die opening or (b) punch?
lathe
A facing operation is normally performed on which one of the following machine tools: (a) drill press, (b) lathe, (c) milling machine, (d) planer, or (e) shaper?
boring drilling turning
A lathe can be used to perform which of the following machining operations (three correct answers): (a) boring, (b) broaching, (c) drilling, (d) milling, (e) planing, and (f) turning?
turning
A lathe is used to perform which one of the following manufacturing operations: (a) broaching, (b) drilling, (c) lapping, (d) milling, or (e) turning?
workpart moves linearly past a single-point tool
A planing operation is best described by which one of the following: (a) a single-point tool moves linearly past a stationary workpart, (b) a tool with multiple teeth moves linearly past a stationary workpart, (c) a workpart is fed linearly past a rotating cutting tool, or (d) a workpart moves linearly past a single-point tool?
low v, high f and d
A roughing operation generally involves which one of the following combinations of cutting conditions: (a) high v, f, and d; (b) high v, low f and d; (c) low v, high f and d; or (d) low v, f, and d, where v = cutting speed, f = feed, and d = depth of cut?
increased
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?
true
Boring and reaming share the common feature that they are both used to enlarge an existing hole: (a) true or (b) false?
false
Flash in impression die forging serves no useful purpose and is undesirable because it must be trimmed from the part after forming? true false
0.6 Tm
Hot working of metals refers to which one of the following temperature regions relative to the melting point? room temperature 0.2 Tm 0.4 Tm 0.6 Tm
stripper
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?
true
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?
2 x depth of cut
In a turning operation, the change in diameter of the workpart is equal to which one of the following: (a) 1 x depth of cut, (b) 2 x depth of cut, (c) 1 x feed, or (d) 2 x feed?
reduction ratio
In metal extrusion, the extrusion ratio is also known by which of the following terms? area reduction draft reduction reduction ratio
milling planing
Machined parts can be classified as rotational or nonrotational. Which of the following are examples of operations that create nonrotational geometries (two best answers): (a) boring, (b) drilling, (c) milling, (d) planing, and (e) turning?
enlarge a drilled hole improve surface finish on a hole improve tolerance on hole diameter
Reaming is used for which of the following functions (three correct answers): (a) accurately locate a hole position, (b) create a stepped hole, (c) enlarge a drilled hole, (d) improve surface finish on a hole, (e) improve tolerance on hole diameter, and (f) provide an internal thread?
true
Rolling is a bulk deformation process in which the thickness of the work is reduced by compressive forces exerted by two opposing rolls? true false
elastic recovery of the metal
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?
compressive
Stresses applied in most metal forming operations are which of the following? compressive shear tensile
lower
The coefficient of friction between the part and the tool in cold working tends to be? higher lower no different to its value
true
The material removal processes are a family of shaping operations in which excess material is removed from a starting work part so that what remains is the desired final geometry: (a) true or (b) false?
slab
The starting workpiece in hot rolling of steel plate and sheet stock is which one of the following? bar stock billet bloom slab wire stock
drilling milling
Typical operations performed on a machining center include which of the following (two best answers): (a) boring, (b) drilling, (c) milling, (d) sawing, and (e) turning?
plate
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:
bar and wire drawing flashless forging rolling
Which of the following bulk deformation processes are involved in the production of nails for lumber construction (3) bar and wire drawing extrusion flashless forging impression die forging rolling upsetting
inexpensive tooling used for low production
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?
grinding machining
Which of the following manufacturing processes are classified as material removal processes (two correct answers): (a) casting, (b) drawing, (c) extrusion, (d) forging, (e) grinding, (f) machining, (g) molding, (h) pressworking, and (i) spinning?
cluster mill four-high mill
Which of the following rolling mill types are associated with relatively small diameter rolls in contact with the work? (2) cluster mill continuous rolling mill four-high mill reversing mill three-high configuration
average flow stress
Which of the following stress or strength parameters is used in the computation of the force in an extrusion operation average flow stress compression stress final flow stress tensile strength yield strength
cutting speed
Which one of the following cutting conditions has the strongest effect on cutting temperature: (a) cutting speed, (b) depth of cut, or (b) feed?
coefficient of friction between roll and work roll diameter
maximum possible draft in a rolling operation depends on which of the following parameters? (2) coefficient of friction between roll and work roll diameter roll velocity stock thickness strain strength coefficient on work metal
false
production of tubing is possible in indirect extrusion but not in direct extrusion? true false
plastic region
the flow curve expresses the behavior of a metal in which of the following regions of the stress-strain curve? elastic region plastic region