Quiz
Qualitative
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Fragen in diesem Quiz (45)
1The proportion of heat generated in a turning operation is transferred to the components in the following order:
- Aworkpiece > chip > tool
- Btool > chip > workpiece
- Cchip > tool > workpiece
- Dchip > workpiece > tool
2As compared to down milling (climb) operations, up milling (conventional) has characteristics, such as
- AWorkpiece surface condition does not affect tool life; work-holding is more stable
- BWorkpiece surface condition does affects tool life; work-holding is more stable
- CWorkpiece surface condition does not affect tool life, but work-holding is less stable
- DWorkpiece surface condition does affects tool life; work-holding is less stable
3Parameters n and C in the Taylor tool life equation
- AAre constants and do not change even if tool and workpiece materials are changed
- BAre constants and do not change even if tool material is changed
- CAre constants and do not change even if workpiece material is changed
- DAre constants only if tool and workpiece materials are not changed
4The latest hardness scale to be introduced to combine all scales is the ____________ hardness scale
- ARockwell B
- BKnoop
- CBrinnell
- DRockwell C
5In the idealized cutting model a chip is produced ahead of the tool by plastic deformation and shears the material continuously along the ________
- Ashear angle
- Bflank face
- Cshear plane
- Drake face
6The most important property for a cutting tool material is its ______________
- Atoughness
- Bstrength
- Chot hardness
- Dstiffness
7Turning a workpiece with heavy scale, rusted or oxidized surface can lead to ___________ wear.
- AVB (Flank Face)
- Brake face
- Cnose
- Dnotch
8The partitioning of the percent heat generation in the cutting zone is ___________________________.
- ARake face > flank face > shear plane
- Bshear plane > rake face > flank face
- Cflank face > shear plane > rake face
- Dshear plane > flank face > rake face
9The effective rake angle of a cutter can be larger then the tool nominal rake angle if _________
- Athe nominal rake angle is large
- Bthe nominal rake angle is small
- Cthe cutter is used in oblique cutting
- Dthe cutter has a clearance angle
10The abrasive-wear resistance of a cutting tool can be enhanced by selecting a tool coating material with a __________.
- Ahigh toughness
- Bhigh ductility
- Chigh hardness
- Dhigh thermal conductivity
11Application of lubricant/coolant to metal cutting __________ chip thickness
- Acan reduce
- Bwill not change
- Ccan increase
- Dcan reduce depth of cut and
12The basic mechanism of crater wear is usually described as __________.
- Aadhesion
- Babrasion
- Cattrition
- Ddiffusion
13The mechanism in forming built-up edge (BUE) to a cutter is described as __________.
- AChemical affinity between the tool and workpiece material
- BHigh temperature melting of the workpiece material in the cutting zone
- CMechanical loading of the workpiece material to the cutting edge
- DVibration that leads to chip build up on the flank face
14In an orthogonal cutting operation, if cutting edge is inclined at an inclination angle, __________.
- Aeffective rake angle should decrease and cutting force should increase
- Beffective rake angle should decrease and cutting force should decrease
- Ceffective rake angle should increase and cutting force should increase
- Deffective rake angle should increase and cutting force should decrease
15Lubrication/cooling can reduce friction in metal cutting. For a given cutting condition, applying lubrication/cooling results in __________.
- Aincreased cutting and shear forces
- Bdecreased cutting and shear forces
- Cincreased cutting force but reduced shear force
- Dno change in cutting/shear forces
16A built-up edge (BUE) formed during metal cutting normally __________.
- Ais harder than the bulk metal
- Bis softer than the bulk metal
- Chelps reduce cutting force
- Dhelps improve workpiece surface finish
17In metal cutting, wear mechanism of __________.
- Acrater wear is due to abrasive rubbing, whereas flank wear is due to diffusion
- Bcrater wear is due to diffusion, whereas flank wear is due to abrasive rubbing
- Cboth crater wear and flank wear are due to diffusion
- Dboth crater wear and flank wear are due to abrasive rubbing
18A badly oxidized and unevenly round bar is being turned on a lathe. We should recommend __________ in order to preserve tool life.
- Aa small depth of cut, small feed and low speed
- Ba small depth cut, and a high speed
- Ca large depth cut, large feed but a low speed
- Da large depth cut and a high speed
19Among the following tool materials __________ best allows for interrupted cutting.
- Ahigh speed steel (HSS)
- Bceramics
- Cdiamond
- DWC with low cobalt content
20The most required property for a cutting tool is __________.
- Ahot hardness
- BYoung's modulus
- Ctoughness
- Dimpact strength
21Parameter n and C in the Taylor tool life equation __________.
- Aare constants and do not change even if tool and workpiece materials are changed
- Bare constants and do not change even if tool material is changed
- Care constants and do not change even if workpiece material is changed
- Dare constants only if tool and workpiece materials are not changed
22Heat generated during a cutting operation is transferred in low to high percentages in the following order:
- ATool, Part, Chip
- BTool, Chip, Part
- CPart, Chip, Tool
- DChip, Part, Tool
- EChip, Tool, Part
- FPart, Tool, Chip
23Select the order that best represents tool materials below in increasing hardness order. (increasing Rockwell or Knoop hardness numbers) low --> high
- AHSS, Carbon steel, Ceramics, Carbides, CB Nitrides, Diamond
- BCarbon steel, HSS, Carbides, Ceramics, CB Nitrides, Diamond
- CCarbon steel, HSS, Carbides, CB Nitrides, Ceramics, Diamond
- DCarbon steel, HSS, CB Nitrides, Carbides, Ceramics, Diamond
- EHSS, Carbon steel, Carbides, CB Nitrides, Ceramics, Diamond
24When drilling through a material a __________ is usually left on the back side of the hole.
- Adent
- Bchip
- Cburr
- Drelief angle
25In general on a manually operated Bridgeport milling machine you would cut using __________.
- AClimb milling
- BConventional milling
- CDoesn't Matter
26In general a CNC milling machine uses __________.
- AClimb milling
- BConventional milling
- CDoesn't matter
27For most engineering materials, specific energy for grinding is __________ for turning or milling.
- Athe same as
- Bmuch less than
- Capproximately twice as
- Dapproximately 10 times as
- Eapproximately 50 times as
- Fapproximately 100 times as
28Among the following abrasives, (a) CBN & (b) __________ are suitable for ferrous materials grinding.
- AAl2O3 (aluminum oxide)
- BCBN
- CDiamond
- DSiC
29A grinding wheel is marked with D140N100V1/4, which means that the abrasive layer of the wheel contains up to __________ of diamond in volume.
- A14%
- B90+%
- C40%
- D25%
30The hardness of the widely used abrasives are in the order of __________.
- AAl2O3 > CBN > diamond > SiC
- Bdiamond > SiC > CBN > Al2O3
- Cdiamond > Al2O3 > CBN > SiC
- Ddiamond > CBN > SiC > Al2O3
31The surface speed of a conventional grinding wheel is __________ the cutting speed in turning or milling.
- Athe same as
- Bmuch lower than
- Capproximately twice as
- Dapproximately 10 times as
- Eapproximately 50 times as
- Fapproximately 100 times as
32The rake angle of abrasives in grinding are generally ___________.
- AVery negative, up to -60 degrees
- Bpositive to 10 degrees
- Cslightly negative, -10 degrees to 0 degrees
- Dpositive to 60 degrees
- Ea few degrees positive and negative
- Fmixed large positive and negative degrees
33When grinding soft metals such as aluminum or magnesium you would select a wheel with __________ spacing.
- Adense
- Bmedium
- Copen
- Dlarge open
34The most common type of bonding agent for grinding wheels is __________.
- Aresin
- Brubber
- Cvitrified
- Dpowdered metal
35Attritious wear in abrasive grinding is similar to __________ wear in cutting tools.
- Acrater
- Bflank
- Crake face
- Dnotch
36The oldest of the non-traditional or advanced machining processes (AMP) we've discussed.
- AEBM
- BCM
- CECM
- DECG
37In an ECG operation __________ is removed by abrasives, the rest by electrochemical means.
- A2%
- B5%
- C7%
- D10-15%
38A natural process of "undercutting" occurs in the __________ process.
- AWJM
- BCM
- CECM
- DEDM
39Has the highest rate of overall material removal of the AMP's we discussed.
- ACM
- BECM
- CECG
- DEDM
40Select the best process for cutting numerous shapes on a large (3' cube) think walled 3-dimensional object. Final dimensional tolerance of the machining is important.
- ALBM
- BEDM
- CWire EDM
- DEBM
41What would be the best choice for cutting through large sheets of materials yet not thermally affect the part?
- AEDM
- BWire EDM
- CWJM
- DECM
42What would be the best choice for manufacturing multiple copies of an item in thin sheets of metal with intricate designs cut all the way through the material?
- ALBM
- BWire EDM
- CCM
- DAJWM
43Another name for the photo-resist compounds in the CM processes are:
- Aanti-etchers
- Bsafety zones
- Cmasks
- Dde-etchers
44Assuming similar finish and tolerances which process should be the fastest to "machine" a hole 0.250"diameter
- AEDM
- BECM
- CAWJ
- DWJM
45This process has gone from a rarely used subtractive process to a cutting edge additive process.
- AEDM
- BWire EDM
- CEBM
- DLBM
Informationen
- Beschreibung
- Quiz am Qualitative, erstellt von torixoxo6 am 10/12/2014.
- Autor
- torixoxo6
- Sprache
- English
- Aufrufe
- 1
- Bewertung
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