FTT 231-9447

b. Live center.

160

a. Standard profile

A _______ barrel starts around 1 inch, and is eventually tapered down to a .700" at the end of the muzzle.

False

A faster spindle speed should be used when removing material from a high carbon steel surface rather than an aluminum surface.

a. Dial indicator

According to the text, the only tool you will need in order to square a vise is a:

b. Carbide bit; lower

According to the text, when making a dovetail cut on a hardened steel slide, it is best to use a _______ bit and a ________ rate of RPM.

b. Play; lead screw

Backlash is the amount of _________ between the threads of the ________ and the nut.

b. With a rotating lap that follows the rifling

For best results, how should a rifle barrel be lapped?

160

For every _____ hours of lathe use, it is suggested to check the electrical contacts, switches, and connections.

c. They should be carefully cleaned after each use and stored in their shipping containers or plastic tubes

How should reamers be treated?

Salmon

If you are required to heat a gun part to 1,550° F for hardening with a torch, what color should you look for to obtain this temperature?

b. Faint red

If you wanted to heat a small gun part to 985° F with a propane torch, what color should you look for?

False

It is NOT possible to chamber a barrel by hand.

True

NEVER turn a reamer counterclockwise! For any reason! You will dull it instantly.

c. 600° -650° Fahrenheit

Once the newly made spring has been hardened, what temperature should it be drawn to?

Test bar

One way to test the accuracy of lathe centers is with a

b. Tramming.

Squaring the table to the chuck is called:

Column

The _________ acts as the spine of the drill press; it is the main support of the machine.

False

True or False: The main advantage of a V-block is to perfectly align the secured work piece to the milling bit.

False

True or false: A mechanical edge finder is used when the spindle is stationary.

False

True or false: Threading is the process of cutting workpiece edges to produce an angled corner.

d. Hammer, sear, and trigger

What are the three main parts of a trigger mechanism?

c. Gray to dark blue

What color would you see if you achieved the desired drawing temperature of 600-650° Fahrenheit?

b. Cherry to bright cherry

What color would you see if you reached the a temperature of 1,400°-1,500° Fahrenheit?

a. Smooth and highly polished

What condition should a rifle or shotgun bore be in to obtain the best shooting results?

d. A center punch may be used to raise a crater on thehammer notch

What gunsmithing operation may be used on a simple single-stage trigger to prevent the sear from entering the hammer notch too deeply?

d. Offsetting the tailstock

What is another way to obtain a taper besides using a tapering attachment on a lathe?

a. Honing stones

What is the best tool to use when polishing the sear and cocking piece on a trigger assembly to make the trigger pull smoother?

a. Only countersinking leaves a conical relief cut in the surface of the workpiece.

What is the difference between countersinking and counterboring?

c. None of the Above

What is the main difference between a finishing cutter and a rough cutter turning tool?

c. To smooth the bore for easier cleaning, betteraccuracy, or better shot patterns

What is the main purpose of lapping a rifle or shotgun barrel?

a. Thermocouple pyrometer

What is the most common instrument for measuring high temperatures in heat-treating furnaces?

Bed

What is the name of the foundation upon which a lathe is built?

Taper-turning

What is the name of the process that describes turning cylindrical work on a lathe with different diameters throughout its length?

Lapping

What is the process called that entails rubbing minute amounts of metal from surfaces that must be precision-finished?

c. Back-boring

What is the process called when the entire shotgun bore (from the front of the chamber to the rear of the choke) is reamed out to a slightly larger size?

c. Hogging off

What is the term used to describe the removal of metal when work is performed in a metal-turning lathe?

a. Single-stage

What type of factory trigger is used on the Winchester Model 94 and Marlin Model 336 rifles?

Cutting oil

What type of fluid must be used when cutting barrel threads in the lathe?

Tricker

What was a trigger originally called?

b. Re-cast the lead lapping slug and reuse until the process is completed

When doing a rifle lapping process and the lapping slug becomes dull, what is the remedial action step to take?

c. 1,400°-1,500° Fahrenheit

When hardening spring stock, what temperature range is usually correct?

b. The barrel must be warmed with a torch all around

When lapping a rifle barrel, and to ensure a full lap, what must be done to the barrel as the lap is being poured?

b. Headspace

When measuring _____________, a gunsmith examines the distance between the head of the cartridge and the face of the bolt.

c. Straw yellow

When tempering a hardened gun part without the benefit of a heat-treating furnace, what color would you heat the part to for a tempering temperature of 460° Fahrenheit?

c. Like a reversed or mirror image of the existing spring

When using one existing spring in a side-lock shotgun action as a template to make a replacement for the missing opposite spring, how should the curvatures, retaining nipple, and similar items be shaped on their placement spring?

Steady Rest

Which lathe attachment is used to support a hard steel barrel during the taper-turning process?

c. Model 1917 Enfield

Which of the following rifles utilizes square barrel threads?

a. A mill is only able to cut on the X- and Y-axis. **b. None of the Above c. A lathe is best used to cut on the Z-axis d. A drill press is best used to cut on the X-axis.

Which of the following statements is true?

b. Wooden dowel

Which of the following tools would not be used in order to properly lap a shotgun barrel?

Metal-turning lathe

Which one of the following tools, in many cases, is required to install new barrels on centerfire rifles?

b. Creep, 1-3, 3-6

__________ is the first stage of the trigger's travel to the rear, usually requiring a pull weight of ______ pounds. Then to release the sear for firing, a separate ______ pounds of pull weight is required.

c. Thoroughly clean and oil the bore

After a lapping operation is complete, what is the next step to preserve the bore?

a. Viggo Miller

Who manufactured a trigger attachment that may be used on military trigger assemblies to improve trigger pull?