2A7X1 Aircraft Metals Technology Vol 4

Front 1

High-speed steels with the "T" designation have a PRINCIPAL alloy element of

Back 1

b. tungsten

Front 2

When a machining operation subjects the cutter to the shock of an interrupted cut, you do NOT select a cutter made of

Back 2

a. cemented carbide

Front 3

The process of sintering is BEST described as

Back 3

b. holding a material under pressure just below the melting temperature until it fuses

Front 4

A cutting tool that has a coating, which is not a surface covering but actually a part of the tool, BEST describes

Back 4

b. cubic boron nitrides

Front 5

Polycrystalline diamond cutting tools are NOT effective on cobalt or nickel because

Back 5

c. they chemically react with the cutter and cause rapid wear

Front 6

For GENERAL turning operation, you should grind a relief angle of

Back 6

b. 10 degrees

Front 7

The lathe tool bit relief angle affected by a 14 1/2 degree tool holder angle is the

Back 7

a. end

Front 8

To prevent formation of long shavings during turning operations, positive-negative rake inserts have

Back 8

a. a chip breaker

Front 9

If you take TOO LIGHT a feed on a workpiece, you can

Back 9

b. work-harden the workpiece

Front 10

The type of grinding wheel you should use for ROUGH GRINDING carbides is

Back 10

b. 80-grit, SiC

Front 11

Because of its strength, the BEST type of advanced ceramic cutting tools is

Back 11

b. silicon nitride

Front 12

The advanced ceramic that is EXTENSIVELY used in electrical applications is

Back 12

c. aluminum oxide

Front 13

The SIZE of a lathe is designated by the maximum diameter of the workpiece swung over the ways, distance between centers, and

Back 13

c. overall length of the bed

Front 14

The item that permits you to remove backlash between the compound rest and cross slide is the

Back 14

a. gib

Front 15

You use the carriage clamp screw ONLY to lock the carriage in position when you are

Back 15

b. facing

Front 16

The lathe chuck you DON'T use to hold parts with rough surfaces is the

Back 16

d. draw bar collet

Front 17

When truing a faceplate for machining, your LAST option should be

Back 17

b. taking a light facing cut

Front 18

What item can you mount on a faceplate to hold a workpiece that has a VERTICAL surface?

Back 18

b. Angle plate

Front 19

A characteristic that faceplates and driveplates do NOT share is the

Back 19

d. provision for mounting work on the face

Front 20

The factor NOT used in determining the size of a center hole is the

Back 20

a. length of cut

Front 21

The SMALL end diameter of a 3/4" solid mandrel is

Back 21

b. 0.7495"

Front 22

If you must manufacture 250 washers of the same outside diameter, it's BEST to use

Back 22

b. a gang mandrel

Front 23

To machine a 1" diameter carbon steel rod with a selected cutting foot speed (cfs) of 80, you determine the lathe spindle revolutions per minute (rpm) with the formula RPM = CFS X 4 / D, which results in an rpm of

Back 23

c. 320 rpm

Front 24

The RECOMMENDED feed rate for roughing and finishing on a lathe is

Back 24

c. 0.025" to 0.035" and 0.002" to 0.005", respectively

Front 25

The TRUE statement regarding feed rates when machining long workpieces with small outside diameters is feed rates must be reduced

Back 25

a. because the long workpieces tend to spring

Front 26

In GENERAL, the depth of cut when taking roughing cuts on workpieces over 3/4" should be

Back 26

d. 0.250"

Front 27

For taking a finishing cut during straight turning operations, you should take a shallow cut for about 1/4"

Back 27

b. to see if the diameter is correct

Front 28

To face a workpiece properly, the MAXIMUM length the workpiece should extend out of the lathe chuck is

Back 28

a. 1 1/2 times the workpiece diameter

Front 29

When you machine an undercut in a workpiece, ensure the cutting tool has

Back 29

a. no side rake so you can cut in either direction

Front 30

The process of feeding a parting tool into the workpiece, and then moving it slightly to once side for clearance is known as

Back 30

b. step parting

Front 31

If you are parting to length 0.375" spacers with a 0.187" parting tool, you adjust the carriage for each cut

Back 31

c. 0.562"

Front 32

The method of cutting radii on the lathe that requires SIMULTANEOUS COORDINATED movement of the carriage and cross slide is

Back 32

c. hand manipulation

Front 33

The method of cutting radii on the lathe that requires a full-scale layout of the form of the work on a piece of thin sheet metal is

Back 33

d. template and pointer

Front 34

The taper of American Standard taper pins is

Back 34

b. 0.2500 ipf

Front 35

The TPF for the American Standard steep machine taper is

Back 35

c. 3 1/2 TPF

Front 36

If after checking a taper you are machining with the compound rest on a lathe, you find the taper-per-inch is not correct even though you have determined the compound rest angle is accurately set, the PROBABLE cause is the tool bit is NOT

Back 36

a. set at center height

Front 37

When you file work rotating in a lathe, you point the tip of the file at a 10 degree angle toward the tailstock end of the lathe, and hold the handle with your

Back 37

b. left hand and the file tip with your right

Front 38

If you're using the offset tailstock method of machining a taper and you have the included angle and length of work given, you determine the actual angle to machine by

Back 38

a. dividing the included angle by 2

Front 39

One DISADVANTAGE of using the tailstock offset method of machining tapers is

Back 39

d. you can only machine external tapers

Front 40

To take depths of cut when using the taper attachment, use the

Back 40

b. compound rest

Front 41

If the shank of a taper-shank drill is TOO SMALL to fit into the tailstock spindle, use a

Back 41

c. socket reducer

Front 42

You can keep drill from turning when you float it on the tailstock center by

Back 42

d. mounting it in a lathe dog and resting it on the compound rest

Front 43

To produce a very accurate hand-reamed hole, you

Back 43

a. drill approximately 1/32" undersize, bore within 0.005", and hand ream

Front 44

The revolutions per minute you should use for machine REAMING is

Back 44

b. one-half the drilling speed.

Front 45

The position of the boring tool in relation to the work for boring is

Back 45

a. 5 degrees above center for straight and on-center for taper boring

Front 46

In the thread designation 1/4-20 UNC-3B, the "3B" represents a

Back 46

a. close tolerance internal thread

Front 47

Unless otherwise specified, ALL International Organization for Standardization metric threads are considered

Back 47

d. right-hand

Front 48

The "g" in the metric thread designation "M10 x 1.5 - 8" means

Back 48

c. external

Front 49

Thread micrometers are designed to give a direct reading of the thread

Back 49

a. pitch diameter

Front 50

The back-rake angle you should grind on a threading tool is

Back 50

a. 0 degrees

Front 51

The amount of side relief angle ground on a threading tool depends upon the

Back 51

b. helix angle of the thread

Front 52

During a threading operation, take successive cuts by using the

Back 52

d. compound rest

Front 53

You can produce a mirror-like finish on a workpiece while single-pointing if you take

Back 53

d. light cuts of 0.0005"

Front 54

Before you cut internal threads on a workpiece, you must bore the hole to the

Back 54

b. minor diameter of the thread

Front 55

The MAIN difference between cutting right-hand and left-hand threads is, when you cut

Back 55

c. left-hand threads, you swivel the compound rest to the left for external threads

Front 56

The method of cutting multiple lead threads on the lathe that works BEST for cutting Acme and square threads is

Back 56

d. positioning the compound rest parallel to the ways

Front 57

The taper per foot setting on a taper attachment when machining pipe threads is

Back 57

c. 3/4"

Front 58

The NOMINAL size of an external taper pipe thread is the

Back 58

b. approximate inside diameter of the pipe

Front 59

The included angle of an ACME thread is

Back 59

a. 29 degrees

Front 60

To cut a metric thread on a standard lathe, one of the replacement gears must have

Back 60

a. 127 teeth

Front 61

The spindle speed you should use when power tapping a hold with a lathe is

Back 61

a. 10 to 30 rpm

Front 62

The setting for the finish cut when you thread with a geometric die is the

Back 62

b. actual screw pitch

Front 63

If the diametral pitch and work blank diameter are NOT in relation each other, the knurl

Back 63

c. tool does not track properly

Front 64

When dressing a grinding wheel on the toolpost grinder, the FINAL depth of cut should be

Back 64

a. 0.0005"

Front 65

The tool you use in conjunction with a center rest to support hexagonal or square stock is a

Back 65

d. cathead

Front 66

By using the micrometer carriage stop, you can position the carriage to a tolerance within

Back 66

c. 0.0010"

Front 67

The feature of the quick-change toolpost that provides a positive hold and accurate setting for multiple tool holders is

Back 67

a. dovetailed surfaces

Front 68

When a lathe must be lifted during installation , it is BEST to lift it with

Back 68

d. heavy straps

Front 69

When leveling a lathe during installation, you should use a

Back 69

c. precision level

Front 70

On a lathe, the gibs on the compound rest should be adjusted

Back 70

b. snug, but not tight, on the compound rest.

Front 71

The size of a milling machine is determined by the

Back 71

c. longitudinal table travel in inches

Front 72

The knee on a milling machine attaches to the column by

Back 72

c. dovetail ways

Front 73

BEFORE you tighten or loosen the arbor nut on a horizontal milling machine, you should

Back 73

a. install the arbor support

Front 74

When you install a milling machine, level it by placing a precision level

Back 74

c. longitudinally and laterally on the table

Front 75

The taper on MOST STANDARD milling machine arbors is

Back 75

d. 3 1/2 ipf

Front 76

The feature of a plain milling cutter that eliminates shock and permits a free cutting action

Back 76

d. helical teeth

Front 77

The type of milling cutter you would select to cut off work or mill narrow slot is the

Back 77

c. metal slitting saw

Front 78

While rotating, end mills with a right-hand cut are designed to cut

Back 78

b. counterclockwise only

Front 79

What's the diameter and width of a #404 Woodruff keyseat cutter?

Back 79

b 1/8" wide and 1/2" diameter

Front 80

If you have a spindle speed of 80 rpm, a chip thickness of 0.004", and a cutter with 12 teeth, what is the correct feed rate determined by using the formula F = T x nt x rpm?

Back 80

a. 3.8 ipm

Front 81

The process of milling a flat surface PERPENDICULAR to the cutter axis is an example of

Back 81

a. face milling

Front 82

VOID

Back 82

VOID

Front 83

The MOST LIKELY cause of a parallelogram slot when milling is

Back 83

a. tool deflection in the slot

Front 84

When you mill flutes on a reamer, cut the teeth with

Back 84

b. 2 degrees variation in spacing

Front 85

To mill a square ended keyway in a shaft, you should use a

Back 85

b. plain milling cutter

Front 86

You align the index head with the longitudinal axis of the milling machine table by using

Back 86

b. keys on the base plate

Front 87

The MAIN purpose of the sector arms on an index head is to

Back 87

d. count the number of holes needed to index

Front 88

The type of indexing attachment is quick and easy to setup, and is adjusted by the use of a clutch lever is the

Back 88

c. super spacer

Front 89

On the rotary table surface grinder, you get the depth of cut by feeding the

Back 89

d. work up into the wheel

Front 90

For FINISH grinding, the depth of cut should NOT exceed

Back 90

d. 0.0005"

Front 91

BEFORE you shut off the machine, you should let the wheel run and

Back 91

d. turn off the coolant

Front 92

Discoloration or burning of a part is MOST LIKELY caused by

Back 92

d. insufficient coolant

Front 93

When starting a surface grinder, you should jog start the spindle to

Back 93

a. allow the wheel to come up to speed slowly

Front 94

On a tool and cutter grinder, when the crossfeed handwheel is rotated 2 1/2 full revolutions, the amount of travel is

Back 94

c. 0.250"

Front 95

If you're setting up to cylindrically grind a reamer, position it so the grinding wheel strikes the reamer

Back 95

c. cutting edge heel first

Front 96

The tool and cutter grinding wheel that can grind the face and shoulder of a workpiece at the SAME TIME is the

Back 96

d. angular wheel

Front 97

The only point a computer numerical control machine knows WITHOUT programmer intervention is the

Back 97

b. reference point

Front 98

The G-code that indicates a tool change is

Back 98

a. T

Front 99

To eliminate the portions of the radius not needed when constructing a computer numerical control program, use the

Back 99

d. trim feature

Front 100

The purpose of post processing a completed computer-aided design/computer-aided manufacturing file is it

Back 100

a. converts the program into G-code