Qualitative Questions

1. 1Lubrication/cooling can reduce friction in metal cutting. For a given cutting condition, applying lubrication and cooling results in __________________.

   1. Aincreased cutting and shear forces
   2. Bincreased cutting force but reduced shear force
   3. Cdecreased cutting and shear forces
   4. Dno change in cutting/shear forces
2. 2A built-up edge (BUE) formed during metal cutting normally ________________.

   1. Ais harder than the bulk metal
   2. Bis softer than the bulk metal
   3. Chelps reduce cutting force
   4. Dhelps improve workpiece surface finish
3. 3In an orthogonal cutting operation, if cutting edge is inclined at an inclination angle____________________.

   1. Aeffective rake angle should decrease and cutting force should increase
   2. Beffective rake angle should decrease and cutting force should decrease
   3. Ceffective rake angle should increase and cutting force should increase
   4. Deffective rake angle should increase and cutting force should decrease
4. 4Parameter n and C in the Taylor tool life equation _______________.

   1. Aare constants only if tool and workpiece materials are not changed
   2. Bare constants and do not change even if tool and workpiece materials are changed
   3. Care constants and do not change even if tool material is changed
   4. Dare constants and do not change even if workpiece material is changed
5. 5When grinding soft metals such as aluminum or magnesium you would select a wheel with ___________ spacing.

   1. Aopen
   2. Bmedium
   3. Cdense
   4. Dlarge open
6. 6Among the following tool materials ___________ best allows for interrupted cutting.

   1. Ahigh speed steel (HSS)
   2. Bceramics
   3. Cdiamond
   4. DWC with low cobalt content
7. 7Among the following abrasives, ___________ & ___________ are suitable for ferrous materials grinding.

   1. ACBN, Al2O3 (Aluminum Oxide)
   2. BCBN, Diamond
   3. CCBN, SiC (Silicon Carbide)
8. 8Heat generated during a cutting operation is transferred in low to high percentages in the following order: ___________.

   1. ATool, Part, Chip
   2. BTool, Chip, Part
   3. CPart, Chip, Tool
   4. DChip, Part, Tool
   5. EChip, Tool, Part
   6. FPart, Tool, Chip
9. 9For most engineering materials, specific energy for grinding is ___________ for turning or milling.

   1. Aapproximately 10 times as
   2. Bthe same as
   3. Cmuch less than
   4. Dapproximately twice as
   5. Eapproximately 50 times as
   6. Fapproximately 100 times as
10. 10When drilling through a material a ___________ is usually left on the back side of the hole.

    1. Aburr
    2. Bdent
    3. Cchip
    4. Drelief angle

11. 11In metal cutting, wear mechanism of _____________________.

    1. Acrater wear is due to diffusion, whereas, flank wear is due to abrasive rubbing
    2. Bcrater wear is due to abrasive rubbing, whereas flank wear is due to diffusion
    3. Cboth crater wear and flank wear are due to diffusion
    4. Dboth crater wear and flank wear are due to abrasive rubbing
12. 12A grinding wheel is marked with D140N100V1/4, which means that the abrasive layer of the wheel contains up to ___________ of diamond in volume.

    1. A90+%
    2. B14%
    3. C40%
    4. D25%
13. 13In general on a manually operated Bridgeport milling machine you would cut using __________.

    1. AConventional Milling
    2. BClimb Milling
    3. CDoesn't Matter
14. 14In general a CNC milling machine uses ___________.

    1. AClimb Milling
    2. BConventional Milling
    3. CDoesn't Matter
15. 15The abrasive-wear resistance of a cutting tool can be enhanced by selecting a tool coating material with a ___________.

    1. Ahigh hardness
    2. Bhigh toughness
    3. Chigh ductility
    4. Dhigh thermal conductivity
16. 16A badly oxidized and unevenly round bar is being turned on a lathe. We should recommend ______________ in order to preserve tool life.

    1. Aa large depth of cut, large feed but at low speed
    2. Ba small depth of cut, small feed and low speed
    3. Ca small depth of cut, and a high speed
    4. Da large depth of cut and a high speed
17. 17The hardness of widely used abrasives are in the order of ___________.

    1. ADiamond>CBN>SiC>Al2O3
    2. BDiamond>Al2O3>CBN>SiC
    3. CAl2O3>CBN>Diamond>SiC
    4. DDiamond>SiC>CBN>Al2O3
18. 18The most common type of bonding agent for grinding wheels is ___________.

    1. Avitrified
    2. Bresin
    3. Crubber
    4. Dpowdered metal
19. 19The surface speed of a conventional grinding wheel is ___________ the cutting speed in turning or milling.

    1. Aapproximately 10 times as
    2. Bapproximately 100 times as
    3. Capproximately 50 times as
    4. Dthe same as
    5. Emuch lower than
    6. Fapproximately twice as
20. 20The rake angle of abrasives in grinding are generally ___________.

    1. AVery negative, up to -60 degrees
    2. Bpositive to 10 degrees
    3. Cslightly negative, -10 to 0 degrees
    4. Dpositive to 60 degrees
    5. Ea few degrees pos. and neg.
    6. Fmixed large pos, and neg. degrees
21. 21The 4 wheels below have the same max RPM, same diameter, same face width and are of similar characteristics. Select the one wheel which will give the finest surface finish, all other conditions being optimal for each wheel

    

    1. AA
    2. BB
    3. CC
    4. DD
22. 22The effective rake angle of a cutter can be larger than the tool nominal rake angle if ___________.

    1. AThe cutter is used in oblique cutting
    2. BThe nominal rake angle is large
    3. CThe nominal rake angle is small
    4. DThe cutter has a clearance angle
23. 23Attritious wear in abrasive grinding is similar to ___________ wear in cutting tools

    1. Aflank
    2. Bcrater
    3. Crake face
    4. Dnotch
24. 24The oldest of the non-traditional or advanced machining processes (AMP we've discussed.

    1. ACM
    2. BEBM
    3. CECM
    4. DECG
25. 25Select the answer that best represents tool materials in increase hardness order. (low to high)

    1. AHSS, Carbon Steel, Ceramics, Carbides, CB Nitrides, Diamond
    2. BCarbon Steel, HSS, Carbides, Ceramics, CB Nitrides, Diamond
    3. CCarbon Steel, HSS, Carbides, CB Nitrides, Ceramics, Diamond
    4. DCarbon Steel, HSS, CB Nitrides, Carbides, Ceramics, Diamond
    5. EHSS, Carbon Steel, Carbides, CB Nitrides, Ceramics, Diamond
26. 26In an ECG operation ___________ is removed by abrasives, the rest by electrochemical means.

    1. A5%
    2. B2%
    3. C7%
    4. D10-15%
27. 27A natural process of "undercutting" occurs in the ___________ process.

    1. ACM
    2. BWJM
    3. CECM
    4. DEDM
28. 28Has the highest rate of overall material removal of the AMPS we discussed.

    1. AECM
    2. BCM
    3. CECG
    4. DEDM
29. 29Select the best process for cutting numerous shapes on a large (3' cube) thin walled 3-dimensional object. Final dimensional tolerance of the machining is important.

    1. ALBM
    2. BEDM
    3. CWire EDM
    4. DEBM
30. 30As compared to down milling (climb) operations, up milling (conventional) has characteristics, such as ___________.

    1. AWorkpiece surface condition does not affect tool life, but work-holding is less stable
    2. BWorkpiece surface condition doe snot affect tool life; work-holding is more stable
    3. CWorkpiece surface condition does not affect tool life, but work-holding is more stable
    4. DWorkpiece surface condition affects tool life and work-holding is less stable
31. 31What would be the best choice for manufacturing multiple copies of an item in thin sheets of metal with an intricate designs cut all the way through the material?

    1. ALBM
    2. BWire EDM
    3. CCM
    4. DAWJM
32. 32Assuming similar finish and tolerances, which process should be the fastest to "machine" a hole 0.250" diam. x 0.750" deep in a 2" thick steel block?

    1. AECM
    2. BEDM
    3. CAWJ
    4. DWJM
33. 33What would be the best choice for cutting through large sheets of material yet not thermally affect the part?

    1. AWJM
    2. BEDM
    3. CWire EDM
    4. DECM
34. 34This process has gone from a rarely used subtractive process to a cutting edge additive process.

    1. AEBM
    2. BEDM
    3. CWire EDM
    4. DLBM
35. 35The proportion of heat generated in a turning operation is transferred to the components in the following order:

    1. Achip > workpiece > tool
    2. Bworkpiece > chip > tool
    3. Cchip > tool > workpiece
    4. Dtool > chip > workpiece
36. 36Parameter n and C in the Taylor tool life equation ___________.

    1. AAre constants and do not change even if tool and workpiece materials are changed
    2. BAre constants and do not change even if tool material is changed
    3. CAre constants and do not change even if workpiece material is changed
    4. DAre constants only if tool and workpiece materials are not changed
37. 37The latest hardness scale to be introduced to combine all scales is the ___________ hardness scale.

    1. AKnoop
    2. BRockwell B
    3. CRockwell C
    4. DBrinnell
38. 38The partitioning of the percent heat generation in the cutting zone is ___________.

    1. Ashear plane > rake face > flank face
    2. Brake face > flank face > shear plane
    3. Cflank face > shear plane > rake face
    4. Dshear plane > flank face > rake face
39. 39In the idealized cutting model a chip is produced ahead of the tool by plastic deformation and shears the material continuously along the ___________.

    1. Ashear plane
    2. Bshear angle
    3. Cflank face
    4. Drake face
40. 40The mechanism in forming a built-up edge (BUE) to a cutter is described as ___________.

    1. AMechanical loading of the workpiece material to the cutting edge
    2. BChemical affinity between the tool and workpiece material
    3. CHigh temperature melting of the workpiece material in the cutting zone
    4. DVibration that leads to chip build up on the flank face
41. 41The most important property for a cutting tool material is its ___________.

    1. Ahot hardness
    2. Btoughness
    3. Cstrength
    4. Dstiffness
42. 42Another name for the photo-resist compounds in the CM process are:

    1. Amasks
    2. Banti-etchers
    3. Csafety zones
    4. Dde-etchers
43. 43Turning a workpiece with heavy scale, rusted or oxidized surface can lead to ___________ wear.

    1. Anotch
    2. BVb (Flank Face)
    3. Cnose
    4. Drake face
44. 44Application of lubricant/coolant to metal cutting ___________ chip thickness.

    1. Acan reduce
    2. Bcan increase
    3. Cwill not change
    4. Dcan reduce depth of cut and

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Test sobre Qualitative Questions, creado por edonlon2007 el 10/12/2014.

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