323 Flashcards
Straight turning is performed by machining a workpiece to the same diameter along the
Entire length of the workpiece
A groove or undercut at the diameter change to ensure grinding up to the square face of a large diameter is a
Relief notch
The most common method for turning tapers larger than 3 in./ft is the _____ method
Compound rest
When facing a workpiece that is short, you should mount it
Any of the above
When facing work between centers, use a half-center in order to
Provide clearance for the cutting tool
To make sure that bored and counterbored holes are concentric
Always use the same lathe setup for both
bore large and irreqularly shaped workpieces in a
Horizontal boring mill
Which of the following methods can be used for boring tapers?
Compound rest method
The most accurate method tor boring tapers on a lathe is the
Taper attachment method
The shape of screw threads cut on a lathe is determined by the
Profile of the cutting tool tip
The most common way to drill in a lathe Is to mount the drill
In the talistock quill
When drilling long holes or working with bulky or cumbersome workpieces, you should mount the drill
In the headstock
The most accurate way to drill in a lathe is
Drill stationary with workpiece rotating
The machine most often used for drilling jobs in which a high degree of accuracy is not needed is
Sensitive drill press
Use a radial drill press when the workpiece
Is too large or bulky for an upright drill press
The major difference between spot facing and counterboring is spot facing
Removes less metal
Boring is done in a drillpress by installing a boring bar in a
Boring head
Use drill jigs when
The same hole is to be repeated a number of times
Reaming can be done
By hand
In a drill press
In a lathe
All of the above
Honing is done with the use of
Very fine abrasive stones
Machining a groove in the surface of a flat piece of metal is an example of _____ milling
Side
Machining angular, concave and convex cuts into metal workpieces are examples of _____ milling
Profile
Face milling cutters 6 in. or less in diameter are called
Shell end mills
Machining keyways for a standard Woodruff key is a common example of
Slotting
The primary advantage of shaping as opposed to milling is
Single-pointed cutting tools are less costly than milling cutters
A slotting machine is actually the same thing as a(n)
Vertical shaper
The cutting action of a broaching machine is done by
Pushing or pulling horizontally
The cutting teeth on a broach
Increase in height from the end entering to the end leaving the workpiece
Surface grinding is done in order to
Produce extremely close tolerances
Produce very fine finishes
Remove metal that is too hard for normal machining
All of the above
The main advantage of using a vertical grinding machine is that
A greater area can be done in less time
The accuracy required to hold close tolerances
Affects the choice of machine
Affects the function of the final workpiece
Increases the skill involved in machining
All of the above
Angular dimensions are measured in
Degrees and minutes
Care must be taken when working with angular tolerances because
The spread becomes larger as distance increases away from the center
In a unilateral system of specifying tolerances,
Only a plus or a minus is given
Tolerance stackup must be calculated when working with
Multiple dimensions on one workpiece
A rough cut removes excess material and allows for
The finish cut
When taking a rough cut, you must take finishing operations into account, or
The finished workpiece may be undersized
During a finish cut,
A small amount of material is removed
The type of surface finish made by a machine tool is influenced by
Feed marks left by the cutting tool
The way chips are formed by the tool
Vibration between the workpiece and the tool
All of the above
A surface averaging instrument measures
Average roughness of surface texture
The ease with which metal can be removed from a workpiece is referred to as
Machinability
Brittle metals like cast iron form chips that are
Discontinuous
When selecting cutting fluids, you should always consider
Amount of fluid
Point of fluid application
Type of fluid
All of the above
Solid lubricants are mainly used on
Hacksaw and bandsaw blades
After a list of operations has been made for a specific job, the next step is to
Make the best operational sequence
A careful study and analysis of the total job is crucial to
Machining efficiency
For maximum working efficiency, always try to
Use the same machine for as many operations as possible
Specially designed fixtures and attachments can be justified when
A fast wearing part is made on a regular basis
Emergency parts must be made to keep a production line running
Spare parts must be made for obsolete equipment
All of the above
Always try to select a machine which is
Slightly oversized for the job
When choosing a machine for a given operation
Make sure the machine has more than enough power to perform the job
Stay away from the outer limits of a machine’s capacity
Use the machine designed for that specific operation
All of the above
