Mech 2653 Test 3

In surface roughness measurement, the standard cut-off length is ___. A. 0.100" B. 0.050" C. 0.020" D. 0.0100"

0.030"

The mathematical quantity associated with precision for a device is ____. A. Standrd deviation B. Median C. Root mean square D. Mean

Standard deviation

A spade drill is used for what drilling application? A .1" and larger holes in thick materials B. 1" and smaller holes C. deep holes D. 1" and larger holes in thin materials (1/16" and less thickness)

1" and larger holes in thick materials

In the inspection process, the measurement instrument should be ___ times more precise than the tolerance to be measured. A. 2 B. 5 C.10 D. 100

10

The point angle is most often ground at an angle of ___ degrees. A. 135 B.118 C. 95 D. 100 E. 150

118

A point angle of ___ degrees is often used to drill more ductile materials. A. 150 B. 110 C. 135 D. 120

135

A major contribution to the lathe was the slide carriage in ___. A . 1650 B. 1800 C. 1905 D. 1776

1800

Coated carbides have an increased tool life of ___. A. 50-75% B. 500% or more C. 200-300% D. 100-150%

200-300%

Drilling makes up about ____% of all machining operations. A. 25 B. 20 C. 10 D. 35 E. 30

25

When PCBN tooling, cutting speeds and therefore MRR can be ___ times greater than cemented carbide tooling A. 30 B. 20 C. 10 D. 5 E. 2

5

What percentage of the total energy of the machining process goes into the shearing process? A. 30-40% B. 40-50% C. 50-60% D. 60-70%

60-70%

Approximately ___% of carbide tools are coated, commonly by the ___ vapor deposition process. A. 90 to 100 B. 85 to 90 C. 60 to 75 D. Chemical E. Physical F. Electron

85 to 90 Chemical

The desired difference between the dimensions of two mating parts is called ____. A. Allowance B. Interference C. Clearance

Allowance

Which of the following is not a machining process? A. Drilling B. Grinding C. Turning D. Broaching E. Milling F. Shaping G. Casting H. Sawing

Casting

Which of the following is not correct for coated carbide tooling? A. Coated carbides are used only in turning operations B. It should be the first material considered for a machining operation. C. The coating can be a single layer or multiple layers of very thin material. D. The coating materials are selected to improve various properties for the tooling to improve performance of the cutting tool

Coated carbides are used only in turning operations

Cutting fluids are used primarily as ____. A. Rust prevention agents B. Lubricants C. Coolants D. Flushing agents

Coolants

The machine used to reverse engineer parts and perform inspection of parts in 3-D space is ___. A. Laser interferometer B. Robotic measurement machine C. Caliper D. Coordinate measurement machine

Coordinate measurement machine

Select the three variables that are normally controlled in the machining process. A. Part material B. Depth of cut C. Speed D. Temperature of the tooling E. Feed rate F. Work holding devices G. Temperature of the part H. Cutting fluid I. Machine tool horsepower

Depth of cut speed feed rate

Which of the following is not a basic chip type? A. Continuous with built-up edge B. Continuous C. Discontinuous D. Discontinuous with built-up edge

Discontinuous with built up edge

The size of a lathe is specified by two parameters, which are ___ and ___. A. drive motor horsepower B. spindle diameter C. distance between centers D. bed length E. bed width F. swing

Distance between centers swing

What is the process called that produces a flat surface perpendicular to the axis of rotation of the work piece? A. Knurling B. Boring C. Facing D. Turning

Facing

Collets have a wide range of sizes that they can hold. True or False?

False

The compound rest can be used on the lathe to produce long tapers in the turning and boring parts. True or False?

False

With a horizontal boring machine, the part and the tooling are rotated around a horizontal axis simultaneously. True or False?

False

For the oblique machining process, match the listed forces and descriptions: Force acting in the direction of the tool feed A. Radial force B. Primary cutting force C. Feed Force D. Tangential force

Feed Force

When machining long, slender parts to reduce the deflection of the work piece a ___ and a ___ can be used to support the part. A. tracer attachment B. follow rest C. steady rest D. tool rest E. carriage rest

Follow rest steady rest

Identify for each of the following whether the device is used for measurement or gaging. Be careful- the name does not always tell you. Go/No-Go Plug gage A. Measurement B. Gaging

Gaging

What is the process called that uses fixed size instruments to determine if a part has been machined within tolerance? A. Sizing B. Calibrating C. Measurement D. Gaging

Gaging

PCBN and diamonds are extremely hard but brittle materials, placing new demands on machine tools and machining processes. These demands include the following: Machining practices involving ___ entry and exit of the cut to prevent microchipping of the tool material. A. Flexible B. Gentle C. General-purpose D. High-precision E. Quicker F. Rigid G. Feed rates H. Spindle Speeds

Gentle

Which of the following is not a material for drill bits? A. Carbide inserts B. HSS with Al2O3 coating C. HSS with TiN coating D. HSS E. Solid carbide

HSS with Al2O3 coating

Tools made from high speed tool steel are generally used for what type of machining operations? A. High-speed finishing operations B. Hand tools and low-volume machining operations C. High-speed machining operations D. Rough cut machining operations

Hand tools and low volume machining operations

Continuous chips are formed with ___ ductile materials. A. Low B. High C. both, high and low

High

PCBN and diamonds are extremely hard but brittle materials, placing new demands on machine tools and machining processes. These demands include the following: The use of ___ machine tools, because these tool materials are capable of producing higher quality finishes and machining to greater accuracy. A. Flexible B. Gentle C. General-purpose D. High-precision E. Quicker F. Rigid G. Feed rates H. Spindle Speeds

High-precision

Specific horsepower can be defined as ____. A. Horsepower X MRR B. Horsepower/ cutting time C. Horsepower X cutting time D. Horsepower/ MRR

Horsepower/ MRR

The lathe head stock provides ___ and ___. A. housing for the spindle B. speed selection for the spindle C. motion for the tooling D. power for the feed rod and lead screw

Housing for the spindle Speed selection for the spindle

Which of the following is not a method to decrease or eliminate the formation of a built up edge from a cutting tool? A. increasing the depth of cut B. Changing the cutting tool materials C. Adding coolant D. Using positive rake tooling E. Altering the cutting speed

Increasing the depth of cut

Match the description and terms with regard to surface measurement. The direction of the predominant surface pattern produced by the machining process. A. Peak to peak value B. Lay C. Waviness D. Surface roughness

Lay

Cutting fluids are used secondarily as ___. A. Rust Prevention agents B. Coolants C. Flushing agents D. Lubricants

Lubricants

Accuracy is the ___ spread in measurements made of slide movement during successive runs at a set of target points along an axis of the machine or tool. A. Maximum B. Mean C. Minimum D. Median

Maximum

Identify for each of the following whether the device is used for measurement or gaging. Be careful- the name does not always tell you. Dial Caliper A. Measurement B. Gaging

Measurement

Identify for each of the following whether the device is used for measurement or gaging. Be careful- the name does not always tell you. Tool makers microscope A. Measurement B. Gaging

Measurement

Which machining process has generally replaced shaping? A. Milling B. Broaching C. Sawing D. Turning

Milling

What is the process in which a thin tool is fed perpendicular to the axis of rotation of the work piece to remove the completed part of the stock? A. Parting off B. turning C. Facing D. Knurling

Parting off

Which of the following materials is NOT used for gage blocks? A. Polished stainless steel B. Hardened, ground and polished steel C. Ceramic D. Carbide

Polished stainless steel

For the oblique machining process, match the listed forces and descriptions: Force acting in the direction of the cutting velocity vector A. Radial force B. Primary cutting force C. Feed Force D. Tangential force

Primary cutting force

For the oblique machining process, match the listed forces and descriptions: Force acting perpendicular to the machined surface A. Radial force B. Primary cutting force C. Feed Force D. Tangential force

Radial force

Traditional machining is the process of ___. A. adding material to a part in the form of chips B. Removing material from a part using a laser C. Removing material from a part using robots D. Removing unwanted material from a part in the form of chips

Removing unwanted material from a part in the form of chips

PCBN and diamonds are extremely hard but brittle materials, placing new demands on machine tools and machining processes. These demands include the following: The use of more ___ machine tools. A. Flexible B. Gentle C. General-purpose D. High-precision E. Quicker F. Rigid G. Feed rates H. Spindle Speeds

Rigid

Chip formation involves a localized ___ process with ___ strains and high strain rate plastic deformations in a radial ___ region that progresses ahead of the tool.

Shearing, large, compression

Tool failure can be classified into two categories: ____ death and ___ death A. Microchip B. fast C. Erosion D. Slow E. Sudden

Slow Sudden

PCBN and diamonds are extremely hard but brittle materials, placing new demands on machine tools and machining processes. These demands include the following: The use of machine tools with high power, becauase these tool materials are capable of higher MRR and higher ___. A. Flexible B. Gentle C. General-purpose D. High-precision E. Quicker F. Rigid G. Feed rates H. Spindle Speeds

Spindle speeds

Match the description and terms with regard to surface measurement. Finely spaced surface irregularity from the machining operations. A. Peak to peak value B. Lay C. Waviness D. Surface roughness

Surface roughness

Which of the following processes are gage blocks are not used for? A. Surface roughness measurement B. Tool setup C. Layout work D. Instrument calibration

Surface roughness measurement

Measurement is a process by which calibrated instruments are used to determine what? A. That the part is machined from the specified material B. That the part is completed and placed into inventory C. That the part is machined within tolerance D. The actual dimensions of the completed part

The actual dimensions of the completed part

ANSI's guide for specifying allowance and tolerance assumes ___. A. The hole size is considered as base. B. The shaft size is considered as base. C. Both the shaft and hole size are considered as base. D. nothing

The hole size is considered as base.

Which of the following statements is false for discontinuous chips? A. They are formed when brittle materials are machined B. They will produce a poorer surface finish on the part C. They are generated using cutting tools with small rake angles. D. They are formed when machining at high cutting speeds and fine feed rates

They are formed when machining at high cutting speeds and fine feed rates

From the following list, select four reasons for machining a part. A. To produce flat, smooth surfaces for mating parts so that they can seal. B. To produce a prototype of a part. C. To create a rough and uneven surface D. To add material to a part E. To produce unique features; ie threads, o-ring grooves, sharp edges, grooves in a part. F. To make a finished hole in a part that is true along an axis.

To produce flat, smooth surfaces for mating parts so that they can seal. To produce a prototype of a part. To produce unique features; ie threads, o-ring grooves, sharp edges, grooves in a part. To make a finished hole in a part that is true along an axis.

The undesired but permissible deviation from a desired dimension is called ___. A. Tolerance B. Interference C. Accuracy D. Precision

Tolerance

Which of the following is NOT a base for machinability? A. tool life B. Tool temperature C. Material properties D. Cutting speed

Tool Temperature

A vertical boring machine is typically used with large parts and the part is rotated around a vertical axis. True or False

True

The carriage on the lathe is an H-shaped casting which provides motion for the tooling. True or False?

True

The centerline of the tailstock quill is adjustable relative to the lathe centerline. True or False

True

The cutting tool is the most critical part of the machining process. True or False?

True

The drill process is has a high MRR. True or False?

True

Typically collets provide more accurate centering than a 3-jaw chuck. True or False?

True

The current design practice is to specify tolerance with a base dimension and +0.000x/-0.0000 or +0.0000/-0.000x. This is called ___ tolerance. A. Monolateral B. Bilateral C. Unilateral D. Trilateral

Unilateral

Material removal rate is defined as ___. A. volume of material cut/cutting time B. Cutting time/ volume of material removed C. Surface area/depth of cut/cutting time D. Volume of material removed X cutting speed

Volume of material cut/ cutting time

Match the description and terms with regard to surface measurement. Surface irregularity of a wide spacing, generally due to warping, vibrations, or deflection during the machining process. A. Peak to peak value B. Lay C. Waviness D. Surface roughness

Waviness

Gage blocks are assembled by being _____ together to create various dimensional sizes. A. Bolted B. Glued C. Pressed D. Wrung

Wrung

With continuous chips, ___ in the work, heat generation, and temperature is experienced A. an increase B. A decrease

a decrease

The tailstock moves ___ and the ___ is housed in the upper casting of the tailstock and moves ___ to the bed with a handwheel. A. along the ways B. with the carriage C. spindle D. quill E. longitudinally F. transversely

along the ways quill longitudinally

What is the 3rd step in the four steps needed to obtain an accurate hole in a workpiece? A. drilling B. boring C. reaming D. centering and countersinking

boring

What types of machines should be used for the turning of small, long slender parts? A. brown and sharpe screw machine B. CNC lathe C. tool makers lathe D. swiss screw machine E. engine lathe

brown and sharpe machine swiss screw machine

Which of the following is NOT used to hold parts in the lathe? A. c-clamp B. face plate C. chuck D. centers E. collet

c-clamp

The tooling for the lathe is mounted on the tool post, which mounts on the ___ which is mounted to the ___, which is part of the carriage assembly. A. apron B. compound rest C. follow rest D. cross-slide

compound rest cross slide

Using a taper attachment to produce a taper causes the ___ to move transversely as a guide shoe moves on the ___. A. compound B. cross slide C. taper bar D. ways

cross slide ways

The surface roughness from a part produced in a lathe can be decreased by ___. A. decreasing the tool feed rate and increasing the tool corner radius B. decreasing the tool feed rate and decreasing the tool corner radius C. increasing the tool feed rate and decreasing the tool corner radius D. increasing the tool feed rate and increasing the tool corner radius

decreasing the tool feed rate and increasing the tool corner radius

A hole saw would not be used in which of the following applications? A. drilling a 2" dimeter hole through 1" thick plastic B. drilling holes in thin materials C. drill a blind, 2" diameter hole in steel D. drilling a 1/18" diameter hole in sheet metal

drill a blind, 2" diameter hole in steel

By mounting a ___ in the lathe tailstock, holes can be produced in the part. A. actylene torch B. tap C. drill bit D. laser

drill bit

A gun drill is used for what applications? A. drilling holes with a diameter larger than 2" B. Drilling gun barrels from solid stock C. Drilling deep holes with a hold diameter less than .025" D. drilling deep holes

drilling deep holes

Which of the following is not an item produced by a screw machine as listed on the website? A. swirler- fire extinguishment industry B. pin for defense industry C. tripwire pin- defense industry D. bone screw- medical industry E. Probe tip with through hole F. contact pin for electronic industry G. Bobbin for electronics industry H. engine piston pin

engine piston pin

Turning is a machining operation that rotates the work piece about an axis and material is removed from the ___ of the part. A. both internal and external surfaces B. internal surface C. external surface

external surface

Cermets are a new class of tool materials best suited for what type of operations? A. machining of high alloy steels B. general purpose machining C. roughing D. finish machining

finish machining

The purpose of a counterboring operation is to produce a ___. A. flat bearing surface for a bold head B. flat bottom recess for a bolt head or nut. C. beveled recess for bolt head D. smooth surface finish on the walls of the drill hole

flat bottom recess for a bolt head or nut

The body of the drill contains two or more helical grooves call ___ for chip removal. A. grooves B. spirals C. helix D. flutes

flutes

Identify for each of the following whether the device is used for measurement or gaging. Be careful- the name does not always tell you. Screw thread pitch gage A. Measurement B. Gaging

gaging

Which of the following processes cannot be performed on a lathe? A. external and internal threading B. tapered turning and boring C. gear hobbing D. reaming E. Drilling F. Broaching G. Facing H. Tapping

gear hobbing broching

Power for the lead screw and the feed rod are provided by the ___. A. belt drive off the spindle B. servo motor C. gearbox

gearbox

Polycrystalline Cubic Boron Nitrides are used for machining what types of materials? A. Plastics, composites, and wood products B. hardened steels and superalloys C. low carbon steel D. aluminum alloys

hardened steels and superalloys

The angle that the flutes make with the center line of the drill is called: A. flute angle B. helix angle C. rake angle D. point angle

helix angle

The spindle is a ___ which supplies the rotational motion to the ____. A. hollow shaft B. solid shaft C. tooling D. work piece

hollow shaft work piece

What type of machine would be used to do boring on large parts that cannot be turned in an engine lathe? A. universal boring machine B. vertical boring machine C. horizontal boring machine D. gantry lathe

horizontal boring machine

Select the statement that is false for the chisel edge of a twist drill. A. it has high generation B. if tends to be self centering C. it has a low cutting speed due to being close to the hole center D. it forms a small hole at the center as part of the drilling operation

if tents to be self centering

Continuous chips remain in contact with the tool face longer, causing ___. A. decreased frictional heating, temperature and tool wear B. Increasing coolant use C. Increased frictional heating, temperature and tool wear D. Increased tool forces

increased frictional heating, temperature and tool wear

Which of the following statements is false for producing holes by trepanning? A. It removes a ring of material to produce the hole B. it works well for producing deep holes C. it is used only in mass production operations D. it uses less power to operate the drill

it is used only in mass production operations

What is the process called that produces a raised diamond pattern on the surface of the part by a cold forming process? A. knurling B. razing C. crossing D. fluting

knurling

The accurate longitudinal feed of the tooling for threading operations is provided by ___. A. Cross slide B. feed rod C. lead screw

lead screw

During the drilling operation, the drill is guided in the hole by the ___ rubbing against the hold. A. margins B. flutes C. lands D. lips

margins

Identify for each of the following whether the device is used for measurement or gaging. Be careful- the name does not always tell you. Height Gage A. Measurement B. Gaging

measurement

Identify for each of the following whether the device is used for measurement or gaging. Be careful- the name does not always tell you. Micrometer A. Measurement B. Gaging

measurement

Identify for each of the following whether the device is used for measurement or gaging. Be careful- the name does not always tell you. Surface roughness instrument A. Measurement B. Gaging

measurement

Cermets are a ___ material in a ___ binder. A. carbon fiber B. metal C. epoxy D. ceramic

metal Ceramic

What is the name of a drilling machine with multiple spindles that produces multiple holes simultaneously in a work piece? A. gang drill press B. vertical drill press C. multispindle drill head D. radial arm drill press

multispindle drill head

Most parts manufactured are a collection of geometric shapes; therefore, dimensions have a ___ distribution. A. Normal B. Weibull C. Chi-square D. Exponential

normal

What is the process called where the drill is fed into the work, removed slightly, fed again and repeated until the hole is finished? A. peck drilling B. cyclic drilling C. rapid drilling D. fast drilling

peck drilling

Collets are used to hold ___ in a lathe. A. only round parts B. odd shaped, difficult to hold parts C. cast parts D. smooth parts

smooth parts

The twist drill was invented in 1863 by whom? A. stephen morse B. eli whitney C. simon north D. james watt

stephen morse

Which of the following statements is false for the reaming process? A. It removes a small amount of material from the hole B. Reaming is a process that can be performed by hand or machinery C. reaming finishes the hole to an exact diameter D. the process will make the hole concentric with an axis of rotation

the process will make the hole concentric with an axis of rotation

What is the most common type of drill bit? A. twist drill B. Spade drill C. center drill D. insert drill

twist drill

What machine should be used for the boring of large, short parts? A. vertical tool lathe B. vertical boring machine C. engine lathe D. horizontal boring machine

vertical boring machine

The ___ are hardened, precision ground steel rails that run longitudinally along the top of the lathe bed. A. guided B. rails C. ways D. tracks

ways

What is the center column or backbone of a twist drill called? A. column B. web C. shank D. rod

web