Cdc

Front 1

physical properties in metals are the properties that are

Back 1

not changed by heat treatment or cold working

Front 2

if a metal has a compostion of 43% Fe, 1% c, and 0.2% Ni, what type of metal is it

Back 2

ferrous

Front 3

if a metal has a composition of 15% Cr, 1% C, 0.21% Fe, and 20% Ni, what type of metal is it

Back 3

nonferrous

Front 4

the diff between cast iron and cast steel is that

Back 4

cast iron contains more than 2% C

Front 5

the mechanical properties of a metal are determined by the

Back 5

grain structure

Front 6

at room temp., cementite grain structure

Back 6

is a mechanical mixture

Front 7

when the element of a metal are absorbed into each other, and the individual components cannot be seen, you have a

Back 7

solid soulution

Front 8

a metals resistance to a higher number of cyclic loads is known as

Back 8

fatigue strength

Front 9

what must be done to a molten metal to form a cast product

Back 9

pour into a mold

Front 10

metal products shaped by force while in a solid state are classified as

Back 10

wrought

Front 11

metal that is worked after casting is considered

Back 11

wrought

Front 12

the process of pulling heated metal through a series of dies

Back 12

drawing

Front 13

what test involves the application of a slowly applied load along a samples axis

Back 13

tensile strength

Front 14

weight of minor load on rockwell tester

Back 14

10 kg

Front 15

when rockwell tester is used, lack of surface uniformity results in

Back 15

inaccurate readings

Front 16

unknown hardness on rockwell

Back 16

C

Front 17

if you notice brale penetrator is chiped

Back 17

replace it

Front 18

what type of penetrator may you have if you get consistently low readings

Back 18

chipped brale

Front 19

main diff between the SAE and AISI coding systems

Back 19

AISI prefix indicates the manufacturing process

Front 20

what metal identification system uses a letter designator to seperate metals into 18 diff family groupings

Back 20

UNS

Front 21

when classifying heat treating frunaces, one variable is the

Back 21

air condition

Front 22

circulating air furnaces are limited to opperations that require

Back 22

low temp

Front 23

when heat treating, using a reactive atmosphere results in chemical

Back 23

blending

Front 24

what is the primary benefit of an oxidizing reactive atmosphere

Back 24

lower costs

Front 25

would you use a nitrogen atmospere for hardening stainless steel?

Back 25

no

Front 26

the choice of heating element depends on the furnace

Back 26

function and atmosphere

Front 27

which furnace component protects the heating elements from damage and serves as the floor to the furnace

Back 27

hearth plate

Front 28

to maintain an atmosphere around the thermocouple equal to that of the air at room temp, heat treating furnaces require

Back 28

protective tubes

Front 29

what type is the most accurate pyrometer used today on heat treating furncaes

Back 29

electronic

Front 30

an oxidized thermocouple results in

Back 30

incorrect temp readings

Front 31

the amount of hardness or softness you can achieve for carbon and low alloy steels is dictated by the

Back 31

carbon content

Front 32

when three atoms of iron and one atom of carbon chemically unite, the resulting compound is known as

Back 32

Fe3C

Front 33

to prevent excessive grain growth when heat treating carbon and alloy steel, you must soak

Back 33

slightly less than required to ensure uniform heating

Front 34

to prevent cracking when cold working metal

Back 34

slightly stress rerlieve or partially anneal it

Front 35

what is and adverse effect of hardening steels

Back 35

brittleness increases

Front 36

when a steel part of unequal cross section is heat treated, the soaking period is determined by the

Back 36

heaviest cross section

Front 37

decalescence occurs when heated steel

Back 37

absorbs heat without a rise in temp

Front 38

for a given type of steel the time that a material remains in decalescence is based on the

Back 38

metal's mass

Front 39

during the heat treating process, when the part has a sudden liberation of heat without a drop in temp its called

Back 39

recalescence

Front 40

during the heat treating of low alloy steel, upon slow cooling to the Ar1 point, transformation occurs

Back 40

at 1333 degres f

Front 41

during the heat treating of low alloy steel, upon fast cooling to the Ar1 point, transformation occurs

Back 41

upon austeniztion

Front 42

when heat treating a part of uneven cross section, what is the quenching procedure

Back 42

heavier section first

Front 43

when quenching a heat treated part in a liquid medium, the purpose for agitation is to

Back 43

maintain contact with the quenchant

Front 44

when quenching a heat treated part in a liquid medium, stirring should be

Back 44

minimized to prevent warpage

Front 45

when annealing steel parts the cooling rate depends on the

Back 45

compostion of the metal

Front 46

which type of steel has the highest normalizing temp

Back 46

hypereutectoid

Front 47

what is required to achieve hardness in ferrous metals

Back 47

the material must contain sufficient carbon content

Front 48

as the percentage of carbon increases in steels, the hardening temp

Back 48

decreases

Front 49

to prevent the formation of pearlite when hardening carbon steel, cool it below 1000 degrees F in less than

Back 49

1 sec

Front 50

when a metal registers Rc53 on rockwell scale it is at

Back 50

max hardness

Front 51

the purpose of case hardening is to produce

Back 51

a hard case over a tough core

Front 52

when grain refining care harden steel

Back 52

refine the case first

Front 53

unlike a carburizing case hardening process, nitriding requires

Back 53

hardening and tempering first

Front 54

an additional advantage to nitried parts is that they have increased

Back 54

corrosion resistance

Front 55

which process produces the most malleable condition in high carbon steel

Back 55

spheroidizing

Front 56

heat treating of stainless steel must be closely controlled to prevent

Back 56

carbon loss

Front 57

stainless steel is stabilized for use at high temp by adding

Back 57

columbium or titanium

Front 58

austenitic stainless steels are hardened by

Back 58

cold working

Front 59

control decarburization with martensitic stainless steels when heat treating, you can

Back 59

use a carburizing atmosphere

Front 60

after descaling martensitic stainless steels by acid pickling, baking helps

Back 60

remove hydrogen embrittlement

Front 61

precipitation hardening stainless steels are different than austenitic stainless steels, since PH stainless steels have a

Back 61

lower nickel content

Front 62

aging martensitic precipitation stainless steels improves

Back 62

strength and ductility

Front 63

for hardness and strength the most important element in aluminum alloys is

Back 63

copper

Front 64

a major weakeness of aluminum alloys at high temp is its tendency to

Back 64

hot short

Front 65

the T designator for aluminum alloys indicates the

Back 65

treatment process

Front 66

the T6 designator for aluminum alloys indicates solution heat treated

Back 66

and artificially aged

Front 67

successful solution heat treatment for heat treatable aluminum alloys requires

Back 67

trapping the copper in solid solution

Front 68

in addition to improving strength solution treation aluminum alloys also improves

Back 68

corrosion resistance

Front 69

Eutectic melting in aluminum alloys results in

Back 69

loss of corrosion resistance

Front 70

in aluminum alloys how does the natural PH comapre to artificial precipitation hardening

Back 70

there is no noticeable diff

Front 71

when heat treating clad aluminum, oversoaking results in

Back 71

loss of corrosion resistance

Front 72

overaging of aluminum alloys results in

Back 72

lower strength

Front 73

one advantage of nickel-cobalt super alloys is its

Back 73

corrosion resistanct at elevate temps

Front 74

to age harden nickel base alloys, they must be held at what temp range

Back 74

900 to 1600 F

Front 75

after welding, titanium alloys should be

Back 75

stress relieved

Front 76

what heat-treating procedure should you perform to improve machinability in titanium alloys

Back 76

annealing

Front 77

what is the most common heat treating procedure ofr titanium alloys

Back 77

annealing

Front 78

after solution heat treation most titanium alloys are quenched in

Back 78

water

Front 79

what property makes aluminum bronzes valuable in a hazardous environment

Back 79

spark resistance

Front 80

if you suspect that the beryllium copper alloy has been incorrectly solution treated, you should

Back 80

anneal it

Front 81

since the temp for age hardening is below the recrystallization temp the aging process

Back 81

refines the grains

Front 82

what is not a variable that must be considered and controlled for the passivation selection

Back 82

size

Front 83

which is not a correct statement about using citric acid for passivation

Back 83

best whenever etching is needed

Front 84

which is not a material used for peening operations

Back 84

aluminum shot

Front 85

which rotarty flap would you used to peen an aluminum alloy surface

Back 85

type II

Front 86

what material is most often used when pre-plating aluminum, steel, or brass

Back 86

nickel or copper

Front 87

the terms of a fraction are the

Back 87

numerator or denominator

Front 88

what is the LCD of 1/8, 5/16, and, 3/4

Back 88

16

Front 89

an 18 in gear meshes with a 6 in gear. if the large gear has 72 teeth, how many teeth does the small gear have

Back 89

24

Front 90

bringing a number to its root means finding the number of

Back 90

equal factors into which it can be divided

Front 91

the pythagorean theorem bases its law on the fact that the square of the length of the hypotenuse of a right triangle is equal to the

Back 91

sum of the squares of the other two sides

Front 92

he line rotates clockwise from the initial line, it is a

Back 92

negative angle

Front 93

the position of a line at the start of an angle is known as the

Back 93

initial line

Front 94

trig functions are the numerical balues of the angles and sides of

Back 94

right triangles calculated by ratios between the sides of acute angles

Front 95

the 3 items you must know in order to solve a right triangle are the function, the definition, and the

Back 95

length of side

Front 96

the sine of an angle in a right triangle equals the

Back 96

side opposite divided by the hypotenuse

Front 97

which metric unit is used to measure capacity

Back 97

liter

Front 98

which metirc unit is used to measure capacity

Back 98

liter

Front 99

which metric prefix means 1000

Back 99

kilo

Front 100

one inch equals 25.4 millimeters. how is that expressed in meters

Back 100

0.0254 meters

Front 101

what item, if not removed while running shop machinery, could cause serious injury

Back 101

necklace

Front 102

to prevent the risk of oxygen deficiency in the work area when working with liquid nitrogen always

Back 102

properly vent the work area

Front 103

what is the minimum number of feet permitted for a vehicle to drive behind a running aircraft engine

Back 103

200 ft

Front 104

always park a vehicle so that it is visible from the cockpit and with the

Back 104

driver's side door closest to the aircraft

Front 105

if you park a vehicle near an aircraft during engine run-up, what is the minimum parking distance

Back 105

25 ft. in front 200 ft. in rear

Front 106

what is the max operating spped if you're operating a special-purpose vehicle in close proximity to an aircraft

Back 106

10 MPH

Front 107

who has the right away on the flightline in all situations

Back 107

aircrafts

Front 108

if you must park your vehicle on the flightline at night use

Back 108

warning flashers

Front 109

if you must leave your vehicle unattended on flight line, you must

Back 109

leave the vehicle unlocked with keys in ignition

Front 110

what must you do after you have completed maintenance on a flight deck component

Back 110

account for all tools

Front 111

approx how many feet from the rear is the aircraft is the noise safety zone

Back 111

300-400

Front 112

under ORM, who is responsible for making risk decisions at the proper level

Back 112

operations leader

Front 113

if you spill something on the floor when should you wipe it up

Back 113

when it happens

Front 114

a flammable liquid is a liquid with a flash point below

Back 114

100 F

Front 115

what should you do before you begin any maintenance in a flammable or explosive environment

Back 115

bleed static on a grounding plate

Front 116

when draftin, from where should the light fall on the draving surface

Back 116

over the left shoulder of a right handed drafter

Front 117

covering the draving board with vinyl or heavy paper

Back 117

helps keep the table from being damaged

Front 118

one quality of vellum or tracing paper is

Back 118

ease of reproduction

Front 119

to ensure blueprints or mechanical drawings, you should

Back 119

store them flat

Front 120

basic drafting equipment consists of

Back 120

a drawing board, t square, and drafting instruments

Front 121

to keep your t square from warping, you should

Back 121

lay it flat

Front 122

when you need to quickly draw angles of other than multiples of 15 degrees, a good tool to select is

Back 122

an adjustable triangle

Front 123

the qurpose of an engineer's or architect's scale is to

Back 123

reduce or enlarge drawings based on the scale

Front 124

the engineer's scale divides inches into

Back 124

decimals

Front 125

the scale, used most often in drafting is the

Back 125

architect's scale

Front 126

the compass, least likely to spring out shape during use, is the

Back 126

center bow compass

Front 127

if you need to increase the radius of a circle, when using a friction head compass, select

Back 127

extension bars

Front 128

the tool used to transfer measurements and distances is

Back 128

dividers

Front 129

when you use dividers to step off equal spaces on a line, you

Back 129

alternate clockwise and counterclockwise steps

Front 130

you can reduce the time you do repetitive drafting jobs by using

Back 130

drafting templates

Front 131

if you use a heavy coating of layout dye on your workpiece, you'll have

Back 131

ragged and uneven lines

Front 132

a good application of the small rule with holder is measuring

Back 132

internal recesses

Front 133

when you construct a figure using geometric construction, use a

Back 133

pencil, a compass, and straightedge

Front 134

when you need to divide an area into equal apaces, use a scale that

Back 134

spans slightly more than the space that you want to divide

Front 135

when construction a perpendicular bisector, the method most accurate is

Back 135

using geometric construction

Front 136

wheich is not true of using arcs

Back 136

is not accurate

Front 137

when constructing circles and arcs on drawings, first draw

Back 137

the circles or arcs

Front 138

when construction a straight line, equal to an arc, set the dividers to to divide the

Back 138

arc into 2 equal parts

Front 139

when you construct the plane figures, you're showing

Back 139

3 dimensional

Front 140

a pictorial view of an object is given by an

Back 140

oblique projection

Front 141

when the projection lines are parallel to each other and perpendicular to the projection plance, the projection is known as

Back 141

an orthographic projection

Front 142

the min number of views needed in an orthographic projection is

Back 142

1

Front 143

the main reason to include an auxiliary view on a print is

Back 143

for clairfication of an object or detail

Front 144

when you have to show 2 or more diff direction cutting planes through an object, use the

Back 144

offset section

Front 145

if you have 3 or more adjacent parts in a cross section, two of the parts should have 45 degree crosshatching, the remaining parts should have crosshatching of

Back 145

30 or 60 degrees

Front 146

to construct an oblique projection, always situate the side with the most complex or irregular features as the

Back 146

front view

Front 147

the lines that define the end limits of an edge or surface to which a measurement applies are known as

Back 147

extension lines

Front 148

the lines that shows where a note applies to an object on the drawing is a

Back 148

leader line

Front 149

the lines that represent the axes of symmetrical parts and serve as extension lines for holes or ther features are called

Back 149

center lines

Front 150

you're going to draw an object and you realize that even though it's uniform in length, it's too long for the print you select

Back 150

a break line

Front 151

if you dimension a long arc whose center is off the print, the leader line is

Back 151

broken

Front 152

to indicate the location of the center of a large arc, use

Back 152

one horizontal and one vertical dimension

Front 153

when you show contour dimensions, show the size and location of hole in the

Back 153

views where the contours appear

Front 154

what feature permits a screw head to seat flush with the parent material

Back 154

countersink

Front 155

for press fit purposes the ifo you must include on the print for knurling is the

Back 155

tolerance diameter before the knurl

Front 156

the tolerance for a dimension with a two place (X.XX) decimal is

Back 156

0.010 inch

Front 157

for angular dimensions where no tolerance is given, hold the angle to the nearest

Back 157

half degree

Front 158

surface roughness is the measurement of finely space irregularities whose height, width, and direction establish surfce

Back 158

pattern

Front 159

lay is defined as

Back 159

the surface pattern produced by tool marks

Front 160

welding symbols give all necessary info for a print weld symobls give

Back 160

type of weld and weld contour

Front 161

to show that a weld need to be placed on the other side of the part the symbol should be placed

Back 161

on the top of the reference line

Front 162

a tolerance zone defined by two paralle planes is the description of

Back 162

flatness tolerance

Front 163

a tolerance zone that is at a right angle to a datum plane is a

Back 163

perpendicular tolerance

Front 164

when you sketch vertical lines, you should use locating dots and

Back 164

sketch downward

Front 165

the most likely location for the title block on a print is the

Back 165

lower right hand corner

Front 166

notes that apply directly to a particular portion of a drawing are called

Back 166

local notes

Front 167

what CAD line tool creates lines that are parallel to existing lines

Back 167

offset lines

Front 168

when CAD technician chooses to change a drawing they must

Back 168

call up the file and edit the drawing

Front 169

what CAD permits the drafter to pivot the drawing on its axis

Back 169

rotate

Front 170

wen desiginin a tool item the important aspect of stndard fasteners that you consider is, they are

Back 170

readily available

Front 171

screws used to fasten pulleys and gears onto shafts are also known as

Back 171

setscrews

Front 172

the most common self locking nuts found on aircraft

Back 172

fiber insert nuts

Front 173

on ordinary working gages, manufacturers allow a tolerance of

Back 173

10%

Front 174

nonferrous tool materials include such materials as

Back 174

tungsten in carbide form

Front 175

a defect found in tools manufactured with low grade steel is

Back 175

uneven tensile strength

Front 176

the best way to keep thermal expansion to a min is to

Back 176

keep tools sharp and use lots of coolant

Front 177

if you are going to machine a series of holes in a workpiece and the location is not critical

Back 177

drill the hole on a drill press

Front 178

the leading cause of tool failure is

Back 178

faulty design

Front 179

which one of the following statements is true

Back 179

a jig guides the cutting tool and a fixture does not

Front 180

what jig permits you to perfrom machine operations on three sides

Back 180

channel jig

Front 181

to drill holes in the flange of a shaft collar, use

Back 181

a ring jig

Front 182

a disadbanctage of using screw guides is that

Back 182

the threads wear and the guide becomes inacurate

Front 183

when placing on a workpiece on a V locator you restrict movement

Back 183

laterally

Front 184

having a diamond locator pin on a cylindrical locator permits

Back 184

a slight deciation between the holes in the workpiece

Front 185

the process that produces relief markings on materials that have thick cross sections is

Back 185

coining

Front 186

an advantage of using an inverted die procedure is, you

Back 186

have reduced the possibility of bending stock

Front 187

a disadvantage of using progressive operations on thin materials is the dies

Back 187

dish the blank

Front 188

on compound dies, with slower working speeds, the ability to use scrap materials is and advantage because scrap materials

Back 188

offset the cost of operating the machine

Front 189

when using the rubber die process, the

Back 189

metal is cut in tension instead of in shear

Front 190

a non-destructive inspection is

Back 190

detecting variations or discontinuities in structure without damaging parts

Front 191

a pair of ring gages used as a set is known as

Back 191

a Go-No-Go set

Front 192

to overcome reading errors, when using precision measuring instruments, you must

Back 192

train and practice

Front 193

what type of fit is used mainly for permissible movement between mating parts and permits a sliding fit

Back 193

clearance

Front 194

if you were to assemble a flywheel and ring gear, what fit would you select

Back 194

FN5

Front 195

an excellent method for accurately reworking an out of round internal taper is

Back 195

honing

Front 196

the max recommended length of a lap, for lapping long spindles, is

Back 196

4x the work dia

Front 197

the width of the spline face of a locally manufacture stud removal tool should be

Back 197

1/32" for smaller studs

Front 198

if you select an Ezy-out to remove a broken stud drill

Back 198

all the way throuhg the stud

Front 199

when you replace a stud with a lockpin that does not cut into the threads you should

Back 199

drill a new pin hole

Front 200

if you have to remove a broken plug, try

Back 200

an extractor

Front 201

when using a hackwsaw blade to remove a broken plug

Back 201

make a wooden handle

Front 202

to modify a speed handle, to make it more useful for removing screws,

Back 202

make a pressure pad for more pressure

Front 203

when drilling a screw out a nutplate, its difficult to keep the drill on center because

Back 203

nutplates float or move around in their brackets

Front 204

after you install a heli-coil, remember to properly remove the tang by

Back 204

breaking it off with a breakoff tool

Front 205

the type of bearing that permits movement along a straight line is a

Back 205

slipper bearing

Front 206

anti-friction bearings are hardened so they

Back 206

retain their strength

Front 207

fabric lined anti-friction bearing are especially designed for

Back 207

heavy load applications

Front 208

to install an aircraft bearing that needs exceptionally high radial load capacity in a small size, selct

Back 208

an aircraft needle bearing

Front 209

to reason that you should remove bearings from their housings at the earliest stage of disassembly is to

Back 209

prevent inadvertent contamination

Front 210

when performing a roller swaging poeration, make sure you center the bearing and

Back 210

make sure the bearing is square with the hole before you press it

Front 211

after maintenance on a Red X aircraft discrepancy is complete, who sighns off the RED X symbol

Back 211

the inspector that checked the completed work

Front 212

what form is used for shop equipment that requires only a prior to use inspection and is repairable but in an unserviceable conditon

Back 212

DD Form 1577-2 (green tag)

Front 213

if you notice the fiberglass handle on your hammer is split, you should

Back 213

replace the hammer

Front 214

to prepare a chisel for cutting hard materials, grind the cutting edge included angle to

Back 214

70 degrees

Front 215

for a hard-to-reach wrenching job, hold the pliers

Back 215

tightly near the handle end for leverage

Front 216

when using a portable disk sander, approx. what angle should you maintain between the sanding disk and workpiece surface

Back 216

15 degrees

Front 217

if you are going to use a high-speed grinder in the shop

Back 217

use a curtain to protect shop personnel

Front 218

two common types of surface plates are made of

Back 218

cast iron and granite

Front 219

what feature prevents cast-iron surface plates from rocking on uneven surfaces

Back 219

three legs

Front 220

when placing heavy items on a surface plate

Back 220

set them on the plate edge and slide them into position

Front 221

if you drop an object on the surface of a cast-iron surface plate and it nicks the plate, how do you remove the nick

Back 221

hone the nick with an oilstone

Front 222

what is not recommended for daily cleaning of granite surface plates

Back 222

mild soap and water

Front 223

what are the standard lengths of sine bars

Back 223

5 and 10 in

Front 224

what tool can you use if you find the vernier caliper too awkward to handle while trying to take a measurement

Back 224

telescoping gage

Front 225

what is the correct way to operate the telescoping gage when using it to gage a hole

Back 225

set the gage in the hole, open it slowly, and let the plungers expand fully in the hole for measurement

Front 226

use acme thread tool gages to

Back 226

set up thread-cutting tools in lathes

Front 227

what is the reading on a 1inch depth micrometer when all the graduations are exposed

Back 227

0.000

Front 228

what determines the largest measurement possible when using an inside micrometer

Back 228

longest extension rod

Front 229

to obtain the correct diameter of a hole when using an inside micrometer, you must add to the actual micrometer reading the length of the

Back 229

body and extension rod

Front 230

on an internal micrometer, what feature permits you to obtain very reliable readings

Back 230

three-point measuring contact system

Front 231

on vernier calipers, what is the max deviation of parallelism permitted

Back 231

0.0005 in

Front 232

each graduation on the main scale of a vernier caliper or height gage equals

Back 232

0.025 in

Front 233

ther vernier bevel protractor accurately divides a degree into segments of

Back 233

5 minutes

Front 234

to check for curvature in a shaft with a dial indicator, mount the ends of the shaft in v-blocks, and then take

Back 234

4 indicator readings around the shaft 90 degrees apart

Front 235

on what material would you use an all-hard hacksaw blade

Back 235

brass

Front 236

which hacksaw blade do you use to saw hollow shpaes and metals of light cross section

Back 236

flexable

Front 237

how many strokes per min is the best cutting speed when using a hand hacksaw

Back 237

40-50

Front 238

if you had to cut a very thin piece of material with a hacksaw, what could you use to keep the saw from chattering

Back 238

clamp the stock between two wood scraps

Front 239

the cut of a file refers to the

Back 239

coarseness and type of cut

Front 240

which file would you select if you had to finish filing threads on a threaded rod

Back 240

three-square

Front 241

which file would you select if you need a safe cutting edge for filing a keyway

Back 241

pillar

Front 242

which scraper would you select the angular portion of a dovetail bearing surface

Back 242

hooked

Front 243

when you scrape the mating surface while using mating parts to identify high spots, notice the spots

Back 243

increase in number, but decrease in size

Front 244

to ream a hole with an interrupted cut, such as a keyway, select

Back 244

a helical fluted reamer

Front 245

on a tap what does the marking "LH" after the thread series indicate

Back 245

a left handed tap

Front 246

using the formula DS=TD-1/N tap drill do you select for a 3/8-20 NC tap

Back 246

0.325 in

Front 247

to remove a broken tap with at least 1/4 in of the tap protruding above the parent metal, first

Back 247

grind flats on the tap and remove it using vise grips

Front 248

the difference between the starting and trailing sides of a die is the

Back 248

starting side has three tapered threads; the trailing side has one tapered thread

Front 249

the main purpose of using lubricants in shop machinery is to

Back 249

reduce friction

Front 250

the tendency of an oil to resist flow is known as its

Back 250

viscosity

Front 251

which type of grease is best used as lubricant for machines prone to high-temp operations and churning

Back 251

soda-soap

Front 252

one limitation of using a solid lubricant is it cannot

Back 252

carry away heat

Front 253

what oiling system pumps the oil to the machine bearings

Back 253

centralized

Front 254

an oiling system that provides cooling, as well as lubrication, is called a

Back 254

bath system

Front 255

the main purpose of using a coolant is to

Back 255

carry away cutting tool heat

Front 256

all cutting fluids extracted from petroleum are classified as

Back 256

mineral oils

Front 257

in a machining operation where the workpiece is a magnesium casting you should select a cutting oil that

Back 257

does not contain water

Front 258

the mist-type coolant delivery system is used

Back 258

for low-speed machining only

Front 259

what is the purpose of the flexible air line located on the head of the contour machine

Back 259

keep layout lines free from ships

Front 260

what part of the saw band provides chip clearance

Back 260

gullet

Front 261

the set of a saw band is the

Back 261

total amount of teeth are offset

Front 262

what is the min number of saw band teeth that should be in contact with the workpiece at all times

Back 262

2

Front 263

which file band is best for filing tool steel

Back 263

16 to 20 pitch bastard cut

Front 264

what causes excessive wear on the idler and drive weels when using the contour machine

Back 264

excessive tension

Front 265

the amount of feed pressure required for filing operations on the contour machine is determined by the

Back 265

finish required on the material

Front 266

what type of band do you use for straight sawing operations

Back 266

widest available

Front 267

which factors must you consider when selecting a saw band for contour sawing

Back 267

smallest radius to be cut and material thichness

Front 268

when performing a stacking-sawing operation on the contour machine, the thickness of the stack should be

Back 268

no greater than the stack width at the base

Front 269

when selecting a mounting saw band for friction sawing on the contour machine, select a

Back 269

dull band and mount it with the teeth upside down

Front 270

when performing friction sawing, use

Back 270

high band velocity and high feed pressure

Front 271

on the contour machine, the angular saw guides

Back 271

twist the saw band to a 30 degree angle

Front 272

rotating the switch cutoff adjustment on the saw band welder of a contour machine affects the

Back 272

weld timing

Front 273

what factors do you need to consider when selecting the proper blade for a cutoff operation

Back 273

size, shape, and cross section of the workpiece

Front 274

to prevent coolant stoppage during cutoff equipment operation

Back 274

clean the coolant filter

Front 275

one difference between contour machine saw bands and horizontal cutoff saw bands is the

Back 275

gage is thicker on the cutoff saw bands

Front 276

to regulate the rate of cut on a horizontal band saw, use the

Back 276

feed adjustment

Front 277

the hold-downs on a universal punching and shearing machine

Back 277

prevent material kickback

Front 278

when making multiple notching cuts on the universal punching and shearing machine, the blade should be lubricated every

Back 278

10-15 cuts

Front 279

to prevent punch failure on a universal punching and shearing machine,

Back 279

do not punch holes in material thicker than the punch dia

Front 280

the size of a radial drill press is designated by the

Back 280

distance from the center of the spindle to the edge of the column with the head extended

Front 281

the component of the radial press that swivels and permits you to drill outsized workpieces is the

Back 281

arm

Front 282

the portion of the land of a drill that is not cut away to provide clearance is referred to as the

Back 282

margin

Front 283

a drill that has a heatptreated holder with a blade made from high-speed steel or cemented carbide best describes a

Back 283

spade drill

Front 284

what machine reamer design feature prevents chatter during reaming operations

Back 284

unequally spaced teeth

Front 285

what is the max amt of metal you can remove with a nose reamer during roughing operations

Back 285

0.030 inch

Front 286

when selecting a pilot for a 0.500 in counter bore, select one that is

Back 286

0.001 to 0.002 under size

Front 287

to spot face a hole correctly, set the speed at

Back 287

25% of the drilling speed

Front 288

what is the recommended chisel edge angle on drill bits intended for general drilling operations on carbon steel

Back 288

118 degrees

Front 289

how do you keep the from from "climbing up" the drill bit as it emerges through the work

Back 289

reduce the feed pressure

Front 290

ne way to prevent chatter when machine reaming is to

Back 290

decrease the cutting speed

Front 291

before you raise or lower a radial drill press that has been idle for a couple days

Back 291

clean the column and apply a fresh oil film

Front 292

what is the most common type of abrasive used in grinding wheels

Back 292

aluminum oxide

Front 293

in the grinding wheel markings "A60-L6-V11," what does the letter V designate

Back 293

bond type

Front 294

after you mount a grinding wheel, what important step must you perform prior to using it in a grinding operation

Back 294

stand aside and let it run for 1 min

Front 295

when selecting a flange for mounting a grinding wheel, it should be approx.

Back 295

one third the dia of the wheel

Front 296

the purpose of dressing a grinding wheel is to

Back 296

improve cutting action

Front 297

the most efficient type of grinding wheel dresser for truing wheels used to perform precision grinding is the

Back 297

diamond dresser

Front 298

when grinding drill points, never raise the shank higher than the cutting edge while you grind or you will

Back 298

grind a negative relief angle on the cutting edge

Front 299

when tracking the belt on a belt sander ensure the machine is

Back 299

running

Front 300

when using sand for abrasive blasting operations on sheet metal, ensure the material is thicker than

Back 300

0.0625 in

Front 301

you must replace the nozzle on a media blasting machine when

Back 301

the outlet is worn to 1 1/2 times its original size

Front 302

what factors determine the nozzle pressure in abrasive blasting

Back 302

medium type and material thickness

Front 303

to determine the best blast distance when abrasive blasting, you start at

Back 303

18 inches and work inward

Front 304

you mask components before abrasive blasting to

Back 304

prevent media intrusion

Front 305

an advantage of using a mechanical arbor press rather than a hydraulic press for broaching is

Back 305

you can feel the cutting action and keep from overpressing the broach

Front 306

what is the pressure range of a typical shop hydraulic press

Back 306

5 to 50 tons

Front 307

when you press-fit a workpiece while using the hydraulic press, what do you do to keep from marring the surface

Back 307

place a soft metal shim between the work and ram

Front 308

the only way to accurately determine the amount of pressure exerted by a hydraulic press is to

Back 308

watch the pressure gage

Front 309

which waterjet mixing tube material is good for rough cutting or when training a new operator

Back 309

low-cost composite carbide

Front 310

what is the part accuracy if cutting material that is over one inch thick with a water jet

Back 310

+-0.005 to +-0.100

Front 311

when piercing with a waterjet, the distance between the tip and nozzle is normally between

Back 311

0.030 and 0.060 inches

Front 312

how often can you normally expect to change nozzle parts on a waterjet

Back 312

daily

Front 313

high speed steels with the "T" designation have a principal alloy element of

Back 313

tungsten

Front 314

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

Back 314

cemented carbide

Front 315

the process of sintering is best described as

Back 315

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

Front 316

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

Back 316

cubic boron nitrides

Front 317

polycrystalline diamond cutting tools are not effective on cobalt or nickel because

Back 317

they chemically react with the cutter and cause rapid wear

Front 318

for general turning operation, you should grind a relief angle of

Back 318

10 degrees

Front 319

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

Back 319

end

Front 320

to prevent formation of long shavings during turning operation, positive negative rake inserts have

Back 320

chip breaker

Front 321

if you take too light a feed on a workpiece you can

Back 321

work harden the workpiece

Front 322

the type of grinding wheel you should use for rough grinding carbides is

Back 322

80-grit, SiC

Front 323

because of it strength the best type of advanced ceramic cutting tools is

Back 323

silicon nitride

Front 324

the advanced ceramic that is extensively used in electrical applications is

Back 324

aluminum oxide

Front 325

the size of a lathe is designated by the max dia of the work piece swung over the ways, distance between centers, and

Back 325

overall length of bed

Front 326

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

Back 326

gib

Front 327

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

Back 327

facing

Front 328

the lathe chuck you do not use to hold parts with rough surfaces is the

Back 328

draw bar collet

Front 329

when truing a faceplate for machining your last option should be

Back 329

taking a light facing cut

Front 330

what item can you mount on a face plate to hold a workpiece that has a vertical surface

Back 330

angle plate

Front 331

a characteristic that faceplates and driveplates do not share is the

Back 331

provision for mounting work on the face

Front 332

the factor not used in determining the size of a center hole is the

Back 332

length of cut

Front 333

if you must manufacture 250 washer of the same outside dia, its best to use

Back 333

a gang mandrel

Front 334

in general the depth of cut when taking roughing cuts on workpieces over 3/4 should be

Back 334

0.0250

Front 335

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

Back 335

to see if the dia is correct

Front 336

to face a workpiece properly, the max length the workpiece should extend out of the late chuck is

Back 336

1 1/2 times the dia

Front 337

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

Back 337

no side rake so you can cut in either direction

Front 338

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

Back 338

step parting

Front 339

the method of cutting radii on the lathe that requires simultaneous coordinated movement of the carriage and cross slide is

Back 339

hand manipulation

Front 340

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 340

template and pointer

Front 341

the taper of American standard taper pins is

Back 341

0.2500 ipf

Front 342

the TPF for the american standard steep machine taper is

Back 342

3 1/2 TPF

Front 343

if after checking a taper you are machining with the compound rest on a lathe, you must find taper per inch is not correct even though you have determined the compound rest angle is accurately set, the probable casue is the tool bit is not

Back 343

set at center height

Front 344

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

Back 344

left hand and tip with right

Front 345

if your using the offest tailstock method of machining a taper and you have the included angle and length of work given you determin the actual angle to machine by

Back 345

dividing the included angle by 2

Front 346

one disadvange of using the tailstock offset method of machining tapers is

Back 346

you can only machine external tapers

Front 347

if the shank of a taper-shank drill is to small to fit into the tailstock spindle, use a

Back 347

socket reducer

Front 348

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

Back 348

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

Front 349

to produce a very accurate hand -reamed hole, you

Back 349

drill approx 1/32 undersize, bore within 0.055, and hand ream

Front 350

the revolutions per min you should use for machine reaming is

Back 350

one half the drilling speed

Front 351

the positon of the boring tool in realtion to the work for boring is

Back 351

5 degrees above center for straight and on center for taper boring

Front 352

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

Back 352

close tolerance internal

Front 353

unless otherwise specified, all international organization for standardization metric threads are considered

Back 353

right hand

Front 354

the "g" in metric thread desination "M10x1.5-8g" means

Back 354

external

Front 355

thread micrometes are designed to give a direct reading of the thread

Back 355

pitch diameter

Front 356

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

Back 356

0 degree

Front 357

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

Back 357

helix angle of the thread

Front 358

during a threading operation, take successive cuts by using the

Back 358

compound rest

Front 359

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

Back 359

light cuts of 0.0005

Front 360

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

Back 360

minor diamter of the thread

Front 361

the main diff between cutting right-hand and left-hand threads is, when you cut

Back 361

left-hand threads, you swivel the compund rest to the left for external threads

Front 362

the method of cutting multiple lead threads on the lathe that works best for acme and square threads is

Back 362

positioning the compound rest parallel to the ways

Front 363

the taper per foot setting on a taper attachment when machining pipe threads its

Back 363

3/4"

Front 364

the nominal size of an external taper pipe thread is the

Back 364

approximate inside diameter of the pipe

Front 365

the included angle of an acme thread is

Back 365

29 degrees

Front 366

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

Back 366

127 teeth

Front 367

the spindle speed you should use when poper tapping a hole with a lathe

Back 367

10-30 rpm

Front 368

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

Back 368

actual screw pitch

Front 369

if the diametral pitch and work blank diameter are not in relation to each other, the knurl

Back 369

tool does not track properly

Front 370

when dressing a grinding wheel on the toolpost grinder, the final depth of cut should be

Back 370

0.0005"

Front 371

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

Back 371

cathead

Front 372

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

Back 372

0.0010"

Front 373

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

Back 373

dovetailed surfaces

Front 374

en a lathe must be lifted during installation, it is best to lift it with

Back 374

heavy straps

Front 375

when leveling a lathe during installation, you should use a

Back 375

presision level

Front 376

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

Back 376

snug, but not tight, on the compound rest

Front 377

the size of a milling machine is determined by the

Back 377

longitudinal table travel in inches

Front 378

the knee oon a millin machine attaches to the column by

Back 378

dovetail ways

Front 379

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

Back 379

install the arbor support

Front 380

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

Back 380

longitudinally and laterally on the table

Front 381

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

Back 381

2 degree variation in spacing

Front 382

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

Back 382

plain milling cutter

Front 383

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

Back 383

keys on the base plate

Front 384

the main purpose of the sector arms on an index head is to

Back 384

count the number of holes needed to index

Front 385

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

Back 385

super spacer

Front 386

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

Back 386

work up into the wheel

Front 387

for finsih grinding, the depth of cut should not exceed

Back 387

0.0005

Front 388

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

Back 388

turn off the coolant

Front 389

discoloration or burning of a part is most likely casued by

Back 389

insufficient coolant

Front 390

when starting a surface grinder, when the crossfeed handwheel is rotated 2 1/2 full revolutions, the amount of travel is

Back 390

0.250"

Front 391

if your setting up to cylindrically grind a reamer, position it so the grinding wheel strikes the reamer

Back 391

cutting edge heel first

Front 392

the tool and cutter grinding wheel that can grind the face and shoulder of a workpiece at the same time is the

Back 392

angular wheel

Front 393

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

Back 393

reference point

Front 394

the g-code that indicates a tool change is

Back 394

T

Front 395

to eliminate the portions of the radius not needed twhen constructing a computer numerical control program, use the

Back 395

trim feature

Front 396

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

Back 396

converts the program into g-code

Front 397

when compared to other types of stainless steel, the most difficult to weld is

Back 397

martensitic

Front 398

before you can return a cobalt-base workpiece to high temp service, you must

Back 398

solution-anneal it

Front 399

the weldability of aluminum alloys depends on the

Back 399

proportions of Cu and magnesium

Front 400

the factor that does not affect the size of the heat affected zone of a base metal is the

Back 400

machine type