Chapter 14 + 15 Multiple Choice

Drills over ____ in diameter require a pilot hole.

1/2"

A ____ chuck can hold irregular shape work as each jaw has individual movement.

4-jaw independent

A ____ is seldom used on modern lathes.

threaded spindle nose

Which of the following actions are considered dangerous when operating a lathe?

All of the above; Measuring with work rotating, using compressed air to clean the machine, and Wearing loose clothing and jewelry

When reaming on the lathe, use a(n) ____.

All of the above; adequate supply of cutting fluid, slow, steady feed, and cutting speed about 2/3 that of a similar size drill

The spindle on a lathe is hollow and tapered internally to ____.

All of the above; allow the use of a knockout bar, receive tools and attachments with taper shanks, and permit long stock to be turned without dangerous overhang

Collets can ____.

All of the above; center work automatically, maintain accuracy over long periods of hard usage, and be expensive because a different size collet is needed for each different size or stock shape

Boring is an internal machining operation ____.

All of the above; employed to enlarge a hole to a specified size, in which a single-point tool is used to enlarge a hole, and that produces a hole concentric with the outside diameter of a workpiece

The size hole to be bored determines the ____.

All of the above; front clearance on the cutting tool, type and size boring bar required, and depth of cuts

The tailstock ____.

All of the above; is necessary to support long work being turned, permits taper turning to be done, and is essential for drilling operations on a lathe

There are a number of factors that must be considered when determining the correct cutting speed and feed rate, including the ____.

All of the above; kind of material being machined, cutting tool material, and condition of the lathe

If a lathe dog binds on the faceplate slot, the piece being turned will ____.

All of the above; not be concentric with the center hole, be pulled off-center, be eccentric with the center hole

The steady rest and follower rest are used to ____.

All of the above; prevent work from springing or bending away from the cutting tool, support long slender work, and reduce or eliminate chatter when long shafts are machined

Lathe filing is not intended to ____.

All of the above; replace a dull cutting tool, repair a surface made by a dull cutting tool, and improve the surface finish

The finish cut brings the work to ____.

All of the above; size using high spindle speed, a sharp cutting tool, and fine feed, the required diameter, and the required surface finish

A tool post grinder permits the lathe to be used ____.

All of the above; to sharpen reamers and milling cutters, for internal and external grinding, and to true lathe centers

Approximate alignment of lathe centers can be determined by checking ____.

All of the above; witness lines at the base of the tailstock, centers visually by bringing them together, and diameters on a sample turned section

Cutter bits are ground to cut ____.

It depends on the tool

The lead screw transmits power from the quick change gear box to the ____.

None of the above

The spindle will have to be ____.

None of the above

Reaming is an operation used to produce a hole ____.

accurate in diameter and improved surface finish

When boring on a lathe, ____.

additional front clearance must be ground on the cutting tool to avoid rubbing

The jaws on a 4-jaw independent chuck ____ to hold larger diameter work.

can be reversed

The jaws on a 3-jaw universal chuck ____.

cannot be reversed to hold larger diameter work

When moved, the variable speed control will ____.

change spindle speed

Parting is the operation of ____.

cutting off material after it has been machined

The swing of a lathe indicates the largest ____.

diameter work that can be turned over the ways

If the live center on a lathe does not run true, the work will have diameters that are ____.

eccentric

If the cutting speed is too slow, ____.

extra time will be needed to complete the job

The bent-tail standard dog ____.

has the setscrew exposed

A bent-tail safety lathe dog ____.

has the setscrew recessed

The longest piece of work that can be turned between centers is equal to the length of the bed minus the space taken up by the ____.

headstock and tailstock

When performing internal grinding on the lathe, the work and the grinding wheel must rotate ____.

in opposite directions

Never attempt to part stock that is held ____.

mounted between centers

Assuming that power is being transmitted through the gearbox, if the quick-change gearbox is changed, the cutting tool will ____.

move faster or slower if the carriage is engaged to the lead screw

The lathe operates on the principle ____.

of the work revolving against the controllable cutting tool

A boring bar is positioned ____ for machining.

on center

When boring with long, slender boring bars, chatter may occur but can usually be eliminated by ____.

reducing tool overhang

The chief function of any lathe, no matter how complex, is to ____.

rotate the work against a controllable cutting tool

When facing stock, a rounded "nubbin" of face material results if the cutting tool is ____.

slightly above center

When facing stock, a square shoulder "nubbin" of face material results if the cutting tool is ____.

slightly below center

Lathe size is determined by the ____.

swing and length of the bed

If the cutting speed is too high, ____.

the cutting tool will dull rapidly

Round and hexagonal stock will center automatically in a 3-jaw universal chuck because ____.

the jaws move simultaneously

"Spark out" is a term associated with grinding on the lathe and means ____.

a point where the grinding wheel is moved back and forth across the work until it no longer cuts

Slower speeds with greater power are obtained on some lathes by ____.

engaging back gear