325 Flashcards
The jaws of a 3-jaw universal chuck close and open
In unison
The jaws of a 4-jaw independent chuck
Are designed to grasp large or odd-shaped work
Can be reversed
Operate separately
All of the above
The quickest and most convenient chuck to set up on a lathe is the
Three-jaw universal chuck
The size of a chuck is designated by its
Diameter
Before mounting a chuck, always place a board across the
Ways
When you install a chuck on the spindle, you should never use
Power from the lathe
A chuck-mounted workpiece must be centered, with the work axis parallel to the lathe’s
Centerline
An exact reference for centering oddly shaped workpieces in a chuck is the
Dead center
The type of work that can be held in a collet chuck is limited to
Small diameter workpieces
A mandrel is mounted in the lathe
Between centers
Facing a workpiece gives it square ends and a
Reference surface
Which angle is the most important on a facing tool?
Side rake
When facing, you should set the tool on the workpiece’s
Centerline
When facing a large area on a workpiece, use the
Automatic feed
The rough cut is intended to remove material from the workpiece
Quickly
The roughing cut should leave enough material for a
Finishing cut
A rough turning tool does NOT make a good
Finish cut
The proper use of cutting fluids allows you to increase
Cutting speed
Depth of cut
Time savings
All of the above
The characteristic that makes a finishing tool differ from a roughing tool is its
Rounded point
A trial finish cut is just like a trial rough cut except that you are looking primarily for
Surface finish quality
Boring a hole in a workpiece makes the hole larger and
Trues it
A bored hole and the circular path in which the tool or workpiece is rotating are always
Concentric
The end clearance on a boring tool bit prevents the
Heel from rubbing
Within practical limits, always use a boring bar with the
Largest diameter possible
The type of corner produced at the end of a bored hole is determined by the
Cutting tool profile
When you bore a hole, you should offset the compound rest to an angle of _____
degrees.
60
During boring operations, a chip buildup should be cleaned out.
Only when the lathe is completely stopped
Forming a recess at the top of an existing hole is called
Counterboring
The counterbore must be concentric with the
Bore
Counterboring procedures are the same as those for
Boring
Machining a recess between two sets of internal threads separates the threads and
Provides chip clearance
The diameter of a hole to be threaded must equal the thread’s
Minor diameter
When threading a bored hole, be sure that you allow for
Tool clearance
A thread-cutting tool must be ground to the particular
Thread form
For right-hand thread cutting, the compound-rest must be rotated to the left
______ degrees.
29
How many different methods are there of boring a taper on a lathe?
Two
When you use the compound-rest method to bore a taper, you must rotate the compound to an angle equal to
One half the included angle
When using the compound-rest method for boring a taper, you must set the tool post and tool holder parallel to the
Compound rest centerline
Of all the methods available to machine a taper on a lathe, which of the following is the most accurate?
Taper-attachment method
The telescopic taper attachment differs from the plain taper attachment in which of the following ways?
A cross-feed screw telescopes internally
A faceplate provides a reference surface that is perpendicular to the lathe’s
Spindle axis
When truing a faceplate, you should select a _____ tool
Broad nosed
Large workpieces that pose mounting problems in a chuck can be mounted on a faceplate with
Faceplate jaws
Faceplate clamps are inserted into
The faceplate slots
To prevent a workpiece from shifting backwards on a faceplate, you should use a
Driver
Workpieces that cannot be held against the vertical surface of a faceplate should be mounted on
An angle plate
You can offset the weight of an angle plate by using a
Counterweight
Each half of the clamp on a V-block angle plate has
V shaped jaws
A specialized mandrel for machining eccentric circular areas has more than one set of
Center holes
When you bore very large workpieces, such as motor housings, on lathe, you should mount them
On the carriage
