MFG 1 homework packet new - cf.linnbenton.edu

Shop SafetySection A Unit 1

Name___________________________________

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) Compressed air may: 1)

A) Injure skin B) Injure ears

C) Cause metal chips to fly D) Cause all of the above

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.

2) The ________ _________ _______ contains information about the properties of particular

chemicals, materials, and other substances.

2)


3) Grinder operations require that: 3)

A) Dust must be controlled

B) Side shield safety glasses be worn

C) Side shield safety glasses be worn and dust controlled

D) Plain safety glasses be worn and dust controlled

4) Proper dress includes: 4)

A) Solid shoes, short or secured hair and a short sleeve shirt

B) Any shoes, short hair and short sleeves

C) Solid shoes and a shop coat

D) Short hair and shirt sleeve shirt

5) To protect hands: 5)

A) Keep them out of danger by thinking about safety

B) Wear gloves

C) Clean chips with a brush instead of hands

D) Both A and C

TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false.

6) Gloves should be worn when cutting hot chips. 6)


7) Grinding dust can: 7)

A) Be a hazard to health B) Be controlled using coolants

C) Be extremely fine metal particles D) All of the above

8) Safety is: 8)

A) Something that pertains only to being inside the machine shop

B) Something that pertains only to machine tool operations

C) An attitude that should be considered in everything you do

D) Really only important to beginners

1

Shop SafetySection A Unit 1

9) The right way (position) to lift is: 9)

A) Weigh the load to see if it is over 57 pounds

B) Keep the back straight, bend knees and squat down

C) Size up the load to determine if it is within your lifting capacity

D) Lean over the load and lift it slightly to see how heavy it is

10) You are going to do maintenance on a permanently wired machine tool. You should first: 10)

A) Turn the machine switch to off

B) Switch off the circuit breaker to the machine, tag and/or lock out the switch with an

appropriate tag and lock

C) Call an electrician to disconnect the machine wiring

D) Have another person stand by the machine while you work

11) Oil soaked rags: 11)

A) Can be a health hazard

B) Should be stored in an approved safety can

C) A, B, and D

D) Can be a fire hazard


12) ________ ________ procedures are intended to protect workers when machine

maintenance is performed.

12)

2

Mechanical HardwareSection A Unit 2

Name___________________________________


1) The term unified coarse thread refers to the number of threads per inch on standard threaded

fasteners.

1)

2) Pitch refers to the number of threads per inch of length. 2)

3) Thread classifications of A or B refer to whether the thread is internal or external. The letter 'A'

would be used with an external thread.

3)

4) A M10 × 1.5 metric thread would have a thread diameter of 1.5 mm. 4)

5) Thread fit are specified as 1, 2, or 3. Class 1 fits are the tightest fit. 5)


6) A regular nut is: 6)

A) Thinner than a jam nut B) Slotted

C) Thinner than its size designation D) Hardened

7) Set screws are used: 7)

A) In place of machine screws B) To secure pulleys to shafts

C) Because they are soft D) Because they have hex heads

8) The difference between a screw and a bolt is: 8)

A) Length B) Class of thread C) Application D) Head shape

9) Cap screws are: 9)

A) Square headed B) Precision screws

C) The same as machine screws D) Also called machine bolts

10) An external type tooth lock washer: 10)

A) Provides less friction than an internal tooth lock washer

B) Provides more friction than an internal tooth lock washer

C) Provides the same friction as an internal tooth lock washer

D) Is used only with 82 degree flat head screws

11) Dowel pins are: 11)

A) Heat treated and precision ground B) Made from dowel stock

C) Painted D) Made from brass

12) A bearing is often held on a shaft with a (an): 12)

A) Bearing holder B) Locktite

C) Internal retaining ring D) Knurled surface

1

Systems of MeasurmentSection C Unit 1

Name___________________________________


1) One inch is equal to 25.4 mm. 1)


2) The measurement 0.0001 would be: 2)

A) One ten-thousandth B) One millionth

C) One thousandth D) One hundredth

3) Knowing inches, to find cm. multiply inches by: 3)

A) 10 B) 25.4 C) .03937 D) 2.54

4) Knowing mm., to find cm.: 4)

A) Divide by 10 B) Divide by 100 C) Multiply by 10 D) Multiply by 100

1

Reading DrawingsSection A Unit 3

Name___________________________________


1) The most common print format the machinist will see is the: 1)

A) Right angular B) Two view C) Orthochromatic D) Orthographic

2) The tolerance of a bore is 1.250 plus or minus .005. The tolerance is: 2)

A) Unilateral B) Bilateral

C) Standard D) None of the above

3) After boring the hole through the coupling, a machinist measures the bore diameter to be 1.251

inches. The tolerance was 1.250 plus or minus .005. It can be concluded that the diameter of the bore

is:

3)

A) Within acceptable tolerance B) Exactly as specified on the drawing

C) Too large D) Too small

4) The tolerance of the keyset width is .125 plus .002 minus .000. It is a ________ tolerance: 4)

A) unilateral B) bilateral

C) unidirectional D) 0.002 inch "absolute"


5) Countersinking is a machining operation in which the end of a hole is shaped to accept a flat head

screw.

5)

6) Counterboring is a machining operation where the end of a hole is enlarged in diameter so that a

bolt head may be recessed.

6)

7) CS is an abbreviation for countersink. 7)

8) CSK is an abbreviation for countersink. 8)

9) The abbreviation for bolt circle is Bltcirc. 9)

10) An auxiliary view is normally used to show a hidden feature. 10)

1

Using Micrometer InstrumentsSection C Unit 4

Name___________________________________


1) What is the maximum discrimination of a standard inch (non-vernier) micrometer? 1)

A) .100 in. B) .0001 in. C) .001 in. D) .010 in.

2) The distance between the graduations on the sleeve of a micrometer is ________ of an inch. 2)

A) .025 in. B) .0001 in. C) .040 in. D) .001 in.

3) The part of the micrometer that carries the .001 inch graduations is the: 3)

A) Carrier B) Thimble C) Spindle D) Sleeve

4) How many threads per inch are on a micrometer spindle? 4)

A) 10 B) 25 C) 40 D) 100


5) A combination micrometer is designed for dual system use in metric and inch measurement. 5)


6) A two-inch micrometer measures from: 6)

A) 2 to 3 inches B) 2 inches and up C) 0 to 2 inches D) 1 to 2 inches


7) Calibration is the process by which any measuring instrument is compared with a known standard. 7)


8) The part of the micrometer which supports the anvil is called the: 8)

A) Spindle B) Support C) Brace D) Frame


9) The screw thread micrometer is specifically designed to measure the pitch diameter of a screw

thread.

9)


10) The scale which permits reading a micrometer to .0001 inch is called the: 10)

A) Decimal B) Milli C) Micro D) Vernier

11) What part of a micrometer assures repeated equal measuring pressure? 11)

A) Ratchet stop B) Spindle lock C) Friction spindle D) A and C

1

Using Micrometer InstrumentsSection C Unit 4

12) In order to be certain of the dimension when measuring with a micrometer: 12)

A) Show the mic to a friend B) Show the mic to your instructor

C) Take at least one reading D) Take at least two readings

13) When measuring a workpiece still hot from machining: 13)

A) Take a quick measurement B) Warm up the micrometer

C) Do not let the anvil touch the work D) Allow the workpiece to cool

2

Setups on the Vertical Milling MachineSection J Unit 3

Name___________________________________


1) A workpiece that is to be clamped to the machine table, can be aligned with the table axis by: 1)

A) Measuring from the edge of the table to the side of the work

B) Placing it against stops in the T-slots

C) Indicating the side of the workpiece

D) All of the above

2) To align a vise on a machine table: 2)

A) Place the vise against stops in the table T-slots

B) Indicate the solid jaw

C) Indicate the adjustable vise jaw

D) Measure the vise jaw with a rule

3) When is the tool head alignment checked with a dial indicator? 3)

A) When any tool changing takes place

B) Before any machining takes place

C) Once every day

D) Before any precise machining square to the table is performed

4) Prior to indicating a tool head for squareness to the table, tighten: 4)

A) The saddle clamps B) The knee clamping screws

C) The table clamps D) All of the above

5) To position the spindle axis precisely over a workpiece edge: 5)

A) Use a dial indicator and a precision parallel

B) Move the table while observing the micrometer dials

C) Use an edge finder

D) All of the above

6) When an edge finder is used to align the spindle center line with a workpiece edge, the spindle

RPM should be:

6)

A) 300 B) 500 C) 700 D) 900

7) When the tip moves on a .200 inch diameter edge finder, how far is the spindle center line from the

workpiece?

7)

A) .100 in. B) .200 in. C) .300 in. D) .400 in.

8) The machine spindle is centered over an existing hole in the workpiece with the aid of: 8)

A) A dial indicator B) An edge finder

C) A precision rule D) All of the above

9) When aligning a work head, how much preload should be set into the indicator? 9)

A) .005 in. B) .030 in. C) .015 in. D) .045 in.

1

Setups on the Vertical Milling MachineSection J Unit 3

10) While aligning a workhead, the head clamping bolts should be: 10)

A) Removed B) Tight

C) Loose D) Exerting a slight drag

2

Vertical Milling Machine OperationsSection J Unit 4

Name___________________________________


1) Lower cutting speeds are used when machining: 1)

A) Tough materials B) Hard materials

C) Abrasive materials D) All of the above

2) High cutting speeds are used with: 2)

A) Light cuts B) Large diameter cutters

C) Heavy cuts D) All of the above

3) What materials are generally cut dry, that is without cutting fluids? 3)

A) Brass B) Steel

C) Cast iron D) Both A and C above

4) Cutting fluids: 4)

A) Increase production B) Prolong tool life

C) Act as lubricants D) All of the above

5) On a setup that is not very rigid, use a: 5)

A) Larger diameter cutter B) Heavy feed

C) Lower cutting speed D) Higher cutting speed

6) When cutting steel under normal conditions, the depth of cut for an end mill should be no more

than:

6)

A) The diameter of the cutter B) 1/4 of the cutter diameter

C) 2 times the cutter diameter D) 1/2 of the cutter diameter

7) The effects of an excessive feed rate are: 7)

A) Very good surface finish

B) Cutting edge chipping and possible broken cutters

C) Rapid cutting edge wear

D) Long lasting cutting edges

8) The longest tool life can be obtained when using: 8)

A) The correct coolant B) The right cutting speed

C) A feed rate that is not too low D) All of the above

9) What is the RPM for a 1/4 (.250) inch diameter, four flute end mill at a cutting seed of 200 SFPM? 9)

A) 1200 B) 2200 C) 3200 D) 4200

10) What is the feed rate in IPM for a 1/2 inch diameter, two-flute end mill with a cutting speed of 100

SFPM and a feed per tooth rate of .003 inch?

10)

A) 1.6 B) 2.8 C) 3.8 D) 4.8

1

Vertical Milling Machine OperationsSection J Unit 4

11) When milling a cavity: 11)

A) The backlash in the table feed mechanism should be ignored

B) The cutting pressure should be with the cutter rotation

C) The cutting pressure should be against the cutter rotation

D) None of the above

12) Circular slots are best machined with: 12)

A) Circular slot cutters B) The aid of a rotary table

C) The workpiece clamped to the table D) All of the above

13) When milling a keyseat into a shaft: 13)

A) The cutter should be sharp

B) The cutter has to be the correct size

C) The cutter needs to be centered over the shaft

D) All of the above

14) Angular cuts on workpieces can be made: 14)

A) By tilting the workpiece B) By tilting the work head

C) With the peripheral teeth of an end mill D) All of the above

15) Holes can be drilled on a vertical milling machine by: 15)

A) Using the sensitive quill feed B) Using the quill power feed

C) Raising the knee of the machine D) All of the above

16) How many thousandths of an inch of material should be left for a finishing cut, when roughing out

a cavity?

16)

A) .010 B) .030 C) .060 D) .080

2

Basic Precision Layout PracticeSection E Unit 2

Name___________________________________


1) The first step in using any height gage after cleaning the surface plate, is to check the: 1)

A) Base for cosine error

B) Vernier alignment at the top of the beam scale

C) Column for perpendicularity

D) Check the height gage zero refrence

2) When scribing perpendicular lines, the workpiece must be: 2)

A) Set on a parallel bar

B) Inverted

C) Left as is and the height gage used on an angle plate

D) Turned 90 degrees

3) Layout lines scribed with a height gage should be: 3)

A) Scribed so that a permanent mark is left on the workpiece

B) Short, dashed lines

C) Scribed repeated times to insure a visible mark

D) Only deep enough to remove the layout dye

1

Work-Holding and Hand ToolsSection B Unit 2

Name___________________________________


1) Parallel clamps are mostly used for: 1)

A) Clamping workpieces on machines such as drill presses

B) Clamping workpieces on the bench for filing and sawing

C) Holding hardened steel precision parallels

D) Holding work for delicate measuring and layout setups

2) C-clamps are mostly used by machinists for: 2)

A) Holding delicate measuring and layout setups

B) Holding vises on milling machines and shapers

C) Clamping workpieces on the bench for filing and sawing

D) Clamping workpieces on machines such as drill presses

3) Large water pump pliers can be used: 3)

A) For unfinished packing nuts, pipe and pipe fittings

B) To loosen arbor nuts

C) For any bolt and nut it will extend to fit

D) All of the above

4) Ball peen hammers under 10 oz. may be used for: 4)

A) Repositioning work in a machine vise

B) Layout work

C) General heavy bending and hammering

D) Hammering on wrench handles to break loose stubborn threads

5) When adjusting a finished work piece in a machine vise, use a: 5)

A) 3 pound ball peen hammer B) Maul

C) Plastic or rawhide mallet D) 8 ounce ball peen hammer

6) An advantage of the adjustable wrench is that one tool can be used for many sizes. What is one of

its disadvantages?

6)

A) It is bulkier than an end wrench and will not fit in some places

B) If it is adjusted too loosely, it will slip and round off the nut or bolt head. This is also hard on

the users knuckles

C) A and B above

D) There are no disadvantages

7) Pipe wrenches should be used only on: 7)

A) Ground and polished surfaces B) Pipe and pipe fittings

C) Nut and bolt heads D) None of the above


8) ________ wrenches are widely used by machinists and mechanics to provide the correct

amount of tightening pressure on a screw or nut.

8)

1

Work-Holding and Hand ToolsSection B Unit 2


9) Standard screwdrivers will slip and damage the slot if: 9)

A) The hardness or temper has been drawn out by overheating

B) The blade is too narrow or too wide

C) The point is misshapen

D) All of the above

10) When clamping parts with finished surfaces in a bench vise: 10)

A) A cheater should be used on the handle to gain leverage

B) They should be gripped very lightly so that rough jaws will not mar finished surfaces

C) They should be gripped very lightly so the smooth surface will not cause it to slip out of the

jaws

D) Soft jaws should be used

2

FilesSection B Unit 4

Name___________________________________


1) A file that has no teeth on its edge is called a: 1)

A) Flat edge B) Safe edge C) Smooth edge D) Straight edge

2) A mill file is: 2)

A) Square B) Double cut C) Milled D) Single cut

3) Files are cleaned with a: 3)

A) File card B) Brush card C) Bench brush D) File cleaner

4) Which of the following can be used to keep a file from pinning? 4)

A) A thin coat of bluing B) Vegetable oil

C) Chalk D) Cutting oil

5) Which kind of file should be used on soft materials? 5)

A) Knife B) Curved tooth C) Coarse D) Flat

6) Which kind of file should be used to obtain a smooth finish on the workpiece? 6)

A) Smooth cut B) Single cut C) Double cut D) Cross cut

7) On which type of file is coarseness designated by a number? 7)

A) Mill B) Machine

C) Curved tooth D) Needle (Swiss pattern)

8) The life a a file is shortened by: 8)

A) Filing too fast B) Too much pressure on the file when filing

C) Letting one file lie on top of another D) All of the above

9) A flat surface may be obtained by the process of: 9)

A) Filing only on the return stroke B) Filing only on the forward stroke

C) Draw filing D) Short stroke filing


10) Pinning can cause deep scratches on a workpiece. 10)


11) Files do not make good pry bars because they are: 11)

A) The wrong shape B) Not long enough

C) Too tough D) Too brittle

1

FilesSection B Unit 4

12) File handles are used to: 12)

A) Extend the file life B) Protect the file user

C) Extend the file D) Protect the file

2

Operating the Machine ControlsSection I Unit 5

Name___________________________________


1) On lathes where speed changes are made by shifting belts on step pulleys, the shift to low speed

range is made by:

1)

A) Engaging both the bull gear lock pin and the back gear

B) Disengaging the bull gear lock pin and moving the back gear lever with the spindle running

C) Shifting the belt tension lever and engaging the back gear

D) Moving the back gear lever forward with the spindle running

2) Speed changes are made on geared head lathes with: 2)

A) A single shift lever mounted on top

B) Shifting levers with synchro-mesh making possible the shifting up and down with the motor

running

C) Several shifting levers on the headstock

D) Automatic transmissions

3) The lead screw is reversed by shifting the: 3)

A) Left hand thread lever B) Feed reverse lever

C) Feed change lever D) Lead screw reversing lever

4) The feed change lever: 4)

A) Changes the direction of the lead screw

B) Changes the feed to a high or low range

C) Diverts the feed to either the cross slide or the carriage

D) Connects or disconnects the carriage handwheel

5) The sliding gear shifter levers on the quick change gear box are used for: 5)

A) Quickly changing feeds during a cut to get a varied finish

B) Quickly change speeds

C) Selecting feeds or threads per inch

D) Changing the ratio between the longitudinal feed and the cross feed

6) The carriage handwheel: 6)

A) Is used for a quick approach and return and for delicate operations not requiring power feed

B) Is used for feeding when coarser feeds are required and when long cuts are made on shafts

C) Has a micrometer dial that is sometimes in metric units as well as English units

D) Should never be used except in an emergency

7) What effect do you think the carriage feed/cross feed ratio would have on surface finish if the same

feed setting is used for turning both the face and the outside diameter surfaces?

7)

A) The facing surface would be coarser and the outside diameter surface would be finer

B) It would be making threads per inch on the longitudinal and feeds on the facing surface

C) The outside diameter surface would be coarser and the facing surface would be finer

D) None, they are the same

1

Operating the Machine ControlsSection I Unit 5

8) The half-nut lever is used for: 8)

A) Threading

B) Changing from longitudinal to cross feed

C) Taking up the slack in the cross slide nut

D) Engaging the longitudinal feed on the carriage

9) Micrometer collars on the cross feed and compound feed handles are graduated in: 9)

A) Degrees and minutes B) Fractions of inches and in centimeters

C) English and English-metric units D) Tenths of inches

10) A lathe that is calibrated for single depth: 10)

A) Will take twice the amount turned on the dial from the diameter of the workpiece

B) Only reads in English units and not in metric units

C) Will take off one-half the amount turned on the dial from the diameter of the workpiece

D) Will take off the amount turned in on the dial from the diameter of the workpiece

2

Cutting Tools for the LatheSection I Unit 3

Name___________________________________


1) High speed steel (HSS) tools are: 1)

A) Used by machinists more often than any other kinds

B) Often used on machines that are capable of operating only at high RPM

C) Able to withstand higher temperatures than other kinds of cutting tools such as carbides

D) Easily shaped into desired forms of tools

2) Form tools produce a specially shaped machined surface by: 2)

A) Exerting great pressure on the work and embossing it

B) The use of special attachments for the lathe

C) Plunging into the workpiece to produce the form of the tool

D) Using a template of the form and a single point tool

3) The most important aspect of a lathe tool is: 3)

A) The tool geometry, including end, side relief and rake angles

B) The fact that they can be re-sharpened when they wear or break

C) The ability to be shaped into desired form

D) When they get overheated in the cut, they are ruined and must be replaced

4) What is a "chip trap"? 4)

A) An improperly ground tool or one that has been re ground many times often has a "chip trap"

that prevents a smooth flow of chips across the tool face

B) A "chip trap" is simply a chip disposal device

C) A wad of stringy chips wrapped around the chuck or workpiece is know as a "chip trap"

D) Too many chips are allowed to accumulate in the chip pan and on the floor, making a

dangerous "chip trap" for the operator

5) Back rakes should be ground on the tool: 5)

A) When the toolholder is of the straight type without a built in back rake

B) At the same time the side rake is ground

C) At the angle given in Table 1 for turning various metals

D) All of the above

6) A threading tool should: 6)

A) Have a negative rake since it has a tendency to "dig in"

B) Be ground to off set any built in back rake from the holder, thus giving it zero rake

C) Be checked with a center gage

D) Have no side relief angle

1

Cutting Tools for the LatheSection I Unit 3

7) The purpose of side and end relief angles are: 7)

A) To carry the chip away from the point of cut

B) To relieve the pressure of cutting from the point of the tool and divert it to a stronger part of

the tool

C) The side relief allows for feed into the work and the end relief provides clearance for the tool

so it will not rub

D) To insure uniform even chip flow across the tool face

8) Back and side rakes: 8)

A) Provide adequate clearance between the workpiece and the tool

B) Carry the chip away from the point of cut and insure uniform even chip flow across the face

of the tool

C) Relieve the pressure of the cutting tool from the point of the cut and divert it to a strongest

part of the tool

D) Are both the same with different names

9) Chips can be made manageable and safe to the operator by using: 9)

A) Feeds and depths of cut that contribute to chip breaking and by using chip breakers on tools

B) Large back rake and side rake angles on tools to contribute to the smooth flow of an even

uniform chip

C) A piece of wood to break them into smaller chips

D) A hook tool to remove them as soon as they are produced and by wearing gloves to protect

you hands

10) A high speed (HSS) lathe tool would have to be above 1300 F. (704 C.) to be overheated. A

temperature of 2000 F. (1093 C.) could be produced on the cutting edge when grinding by:

10)

A) Using the roughing wheel for finishing

B) Using a glazed wheel or by forcing the tool into the wheel

C) Not cooling it off in water frequently

D) Using a wheel that is too coarse

2

Lathe Spindle ToolingSection I Unit 4

Name___________________________________


1) Chucks and face plates are mounted on the spindle by means of: 1)

A) A circle of socket head screws B) A permanent assembly

C) Interchangeable spindle noses D) Any one of several types of spindle noses

2) The long threaded long taper key drive and camlock are terms used to describe: 2)

A) Various types of spindle noses

B) Screws and slide mechanisms on the carriage of the lathe

C) The lead screw and related mechanisms

D) Part of the drive mechanism in the head stock

3) The independent chuck has: 3)

A) Two, three or six jaws that all move in or out an equal distance

B) Three jaws that move independently of each other

C) Four jaws, each of which can move independently without affecting the position of the others

D) A special adjusting system that makes the jaws center round work more accurately

4) The universal chuck has: 4)

A) A special adjusting system that makes the jaws center round work more accurately

B) Four jaws, each of which can move without affecting the position of the others

C) Three jaws that move independently of each other

D) Two, three or six jaws that all move in or out an equal distance

5) The combination chuck: 5)

A) Is a four-jaw chuck with top jaws

B) Can be a four-jaw chuck in which the jaws can be moved independently

C) Can be a three-jaw chuck with a scroll plate, but each jaw does not have an adjusting screw

for independent action

D) Is a three-jaw chuck held in the jaws of a four-jaw chuck

6) Live centers are: 6)

A) Soft material B) Made with carbide inserts

C) Hardened D) Hardened and annealed

7) What are face plates used for? 7)

A) Facing operations only

B) Mounting fixtures and workpieces

C) Driving shafts between centers with a lathe dog


1

Lathe Spindle ToolingSection I Unit 4

8) A drive center or face driver makes possible the: 8)

A) Driving of a face plate

B) Facing off the rough end of a shaft or in the case of a drive center, the truing up of the center

by a kind of reaming

C) Driving of tubular material without chucking it

D) Driving work between centers so that a cut can be taken full length

9) Steel spring collets are used: 9)

A) For turning small precision parts made from standard sized bar stock

B) In automatic machines only

C) To turn large heavy shafting

D) For centering and turning irregular shaped objects

2

Facing and Center DrillingSection I Unit 6

Name___________________________________


1) In which kind of chuck is square or rectangular work set up for center drilling and facing? 1)

A) Six-jaw universal B) Collet

C) Three-jaw universal D) Four-jaw independent

2) When taking a facing cut on a workpiece held in a chuck, the point of the tool should be: 2)

A) Sharp with no radius B) Slightly above center

C) On center D) Slightly below center

3) In order to obtain a facing feed of .010 inch, approximately what inch per revolution feed setting on

the quick change box is necessary?

3)

A) .010 in. B) .0033 in. C) 10 in. D) .030 in.

4) The rough cutting speed for an alloy steel is 45 SFPM and the workpiece diameter is 5 inches. What

is the correct RPM?

4)

A) 36 B) 65.25 C) 360 D) 562.5

5) A workpiece is center drilled in the lathe for the purpose of: 5)

A) Placing it on a mandrel and for turning between centers

B) Turning between centers only

C) Spotting a hole for drilling or for turning between centers

D) Facing to the center of the workpiece

6) What is the included angle of a center drill? 6)

A) 82 degrees B) 45 degrees C) 60 degrees D) 30 degrees

7) Center drills break as a result of: 7)

A) Too light feed and too high speed

B) Too heavy feed and too low speed

C) Dropping them on the floor

D) Allowing chips to form a tangle around them

8) Drilling in too far with a center drill: 8)

A) Damages the center drill on the tapered section

B) Causes the chips to jam and the drill to heat up

C) Makes the taper too large

D) Makes a sharp outer edge, which is a poor bearing surface

1

Other Lathe OperationsSection I Unit 9

Name___________________________________


1) Bores of machined parts such as gears and pulleys are not made by drilling in a lathe without

further machining because drills:

1)

A) Tend to produce oversize holes that run eccentric to the workpiece axis

B) Are not made for standard shaft sizes

C) Tend to produce undersized holes that run eccentric to the workpiece axis

D) Make bell mouthed holes that must be corrected by reaming or boring

2) The main advantage of boring over reaming in the lathe is that: 2)

A) Boring corrects axial misalignment and reaming does not

B) The process of finishing the bore to a precision diameter can be done more quickly

C) Boring corrects any eccentricity in the bore and reaming does not

D) Better finishes are obtainable

3) Three boring operations include (choose two) 3)

A) Through boring, thread relief and knurling

B) Through boring, facing and threading

C) Through boring, counterboring and internal grooving

D) Through boring, countersinking and drilling

4) A machine reamer finish can be improved by: 4)

A) Running a hand reamer through the bore

B) Running a rose reamer through the bore

C) Boring with a finishing tool

D) Leaving more material to remove when reaming

5) What is the purpose of a thread relief groove for internal threading? 5)

A) To prevent breaking a tap

B) Stress relieve the part being threaded

C) To take pressure off the cutting tool

D) To provide a place for the tool to pass out of the thread

6) Taps used for lathe tapping are: 6)

A) Plug, bottoming and spiral point B) National fine, National coarse and taper

C) Spiral, plug and taper D) Taper, plug and bottoming

7) Parting tools can jam in the cut and break as a result of: 7)

A) Feed that is too light B) Lack of cutting oil or chips not cleared

C) The tool is set above center D) Cutting speed that is too high

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Other Lathe OperationsSection I Unit 9

8) Some ways to prevent chatter when cutting off material with a parting tool are to use: 8)

A) Diagonally ground parting tools, use heavy power feed and a high speed

B) A light hand feed, low speed, cutting oil and a rigid setup

C) A heavy feed, low speed and cut off the material near the chuck or near the tailstock center

D) Coolant, feed in very slowly and use very high speed

9) Ordinary knurls make a pattern on the workpiece by: 9)

A) Cutting the material B) Compressing the material

C) Displacing the material D) All of the above

10) Three reasons knurling is done on workpieces are: 10)

A) To cover up errors be increasing the diameter of a part, for tool handles and press fits

B) For tool handles, to resist corrosion and for appearance

C) For press fits, appearance and a gripping surface


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MFG 1 homework packet new - cf.linnbenton.edu

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