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What is the metric system of measure

What is the metric system of measure

SI

How much is 1/64

0.0156

Who is credited with inventing the basic model of the micrometer

Jean Palmer

Pick three types of micrometers

inside, outside chamfer

One complete revolution of the dial caliper needle is how much

0.10 inch

Screw pitch gages are used to determine what

Pitch (number of threads per inch)

What is the telescoping gage used for

to measure internal dimension

What is a sharp hardened steel pointed object used for scratching into parts

Scriber

A what provides reference plane for layout and inspection

surface plate

Remove all blank and blank before starting layout work

burrs and sharp edges

How is torque measured

Ft lb and Nm

When was the American National thread system adopted

1911

Which metric thread is close to 3/8-16UNC

m-10x1.5

Internal threads are made with a

tap

Name three types of taps

tapper, plug, bottoming

Drill used to make a hole before tapping

tap drill

What does NPT stand for

National Pipe Thread

What is the first step in most machine jobs

cut stock piece in band saw

To have the proper cut, how many teeth in the band saw must be in contact with the work?

3

(T/F) The band saw dissipates heat rapidly because of its long continuous blade

True

What kind of blade is best for general purpose cutting on the band saw?

Raker

(T/F) A chop saw uses an abrasive blade to cut material

True

(T/F) The term layup is used to describe the locating lines, circles, and arcs for drilling holes and making cuts

False

This type of wrench is used when fasteners must be tightened within certain limits

torque limiting

(T/F) A reamer is used to produce a hole that is more precise than a drill can

True

(T/F) You should leave some material for the reamer to cut when reaming a hole for precision

True

Lathe size is determined by

Swing and length of the bed

The blank permits angular tool movement

compound rest

The blank is the most rapid and efficient way of holding material in the lathe

Chuck

(T/F) The jaws on a three jaw chuck are reversible

True

What style of cutting tools do we use on the lathe in our shop

indexable inserts

Hardened work materials can be cut by using

Cubic boron tools

Excessive overhang of the compound rest will cause

Chatter

Most drills are made of

HSS

Drills are expressed by which of the following methods

numbers, letters, fractional, all of the above

What is used to raise work above the vise in the milling machine

Parallels

8 to 12 degrees of lip clearance is satisfactory for most blank

Drill bits

(T/F) You should always try and stop the drill chuck by hand when you want to change a bit

False

A blank should be drilled when using a drill bit over 1/2 inch in diameter

Pilot hole

This operation allows for a flathead bolt to be used to attach pieces together

Countersinking

This operation allows for a socket thread screw to be used to bolt pieces together

Counterboring

Blank produces holes that are extremely accurate in diameter and have a fine surface finish

reamer

To drill a hole in a lathe, you must mount the drill in the

tail stock

Which lathe operation causes diamond shaped serrations on the work piece

knurling

Which type of taper turning do we use in the shop

compound rest method

What is the minor diameter of a thread

smallest diameter

A multi toothed cutter pushed or pulled across or through a workpiece describes which operation?

broaching

How many types of teeth does a broach have?

3

Which type of milling machine do we have in the shop

Verticle

(T/F) The milling machine can do two types of operations

True

(T/F) High speed steels are the most versatile of the cutter materials

True

(T/F) Cutting fluids are a lubricant

True

(T/F) You should always blow the chips out of the milling machine with compressed air

False

(T/F) Always check your part while the machine is still running to save time

False

(T/F) The tip of an edge finder is .100 in diameter

False

What does MDI stand for on a CNC

Manual data input

(T/F) Offline programming saves time when programming on a CNC

True

(T/F) Mastercam software can show tool paths of a CNC so the programmer can check the program before running it

True

Miscellaneous codes that are used to control the machine functions such as starting and stopping the machine are known as

M codes

Blank are preparatory codes

G codes

(T/F) Modal commands remain activated until cancelled by other commands

True

MO3 is which command?

Start spindle

In blank programming, all coordinates are measured from a fixed origin

Absolute

Programming stop is which m-code?

M00

A reference point on the part or perhaps a point on the work holding

Program zero position

(T/F) CNC works started in the 60s

True

Information to program a machine tool in the early years of development was punched into what medium

Paper roll

What is an ATC as it pertains to machine tools

Automatic tool changer

CNC lathes that have rotating turret attached to the cross side of the lathe are called

Turret lathes

(T/F) The cartesian coordinate system is the basis of all CNC programs

True

(T/F) CNC lathes have two axis

True

G71 and G72 are which kind of cycles on CNC lathe

Repetative

(T/F) Carbon is the major alloying agent in steel

True

(T/F) Steels are classified by their strength

False (carbon content)

Which steel has a black oxide finsh?

Hot rolled

Which steels can be heat treated most effectively

High carbon

(T/F) Nickel is added to steel to make it stronger

False (titanium)

HSS stands for

High speed steel

(T/F) Tungsten carbide is the hardest known material

True

Which material added to steel makes it corrosion resistant

Chromium

(T/F) Austenitic stainless steel is magnetic

False

(T/F) SAE 1020 steel has approximately 20% carbon content

True

Metals that do not have iron as their basic ingredient are known as

Non ferrous

Which is the strongest aluminum alloy

T6 7075

(T/F) Magnesium alloys are the lightest of the structural materials

True

The controlled heating and cooling of a metal or alloy to obtain certain desirable changes is called

Heat treatment

(T/F) Stress relieving is the process of removing internal stresses from metals

True

Low carbons steel can be hardened by which method

case hardening

Oxidation of the metal while heat treating can be avoided by

wrapping the material with stainless steel foil

What are the methods of quenching used with steel

oil, water, air, all of the above

What does EDM stand for

Electronic discharge machining

(T/F) EDM machine can cut hardened steel blocks into intracit shapes

True

HDM is called which name?

Water jet or hydroxamic machine

Which tool is used to turn a part on the lathe

Right hand

What is the name of the part which holds the end mills in the spindle of the mill

Collect

What is the tap drill size for a 5/16-18 tap?

0.257F

(T/F) You do not need a welding helmet for most small jobs

False

What operation on the lathe do you start the tool on the workpiece

Knurling

(T/F) You should always leave the chuck wrench in the 3 jaw chuck so that you know where it is at

False

(T/F) A dial caliper can measure down to 0.0001 of an inch

False