CNC Lathe Concepts & Hands-On

Each tool on a turning center will have two offsets assigned to it. They are: A. X & C B. X & Z C. X & Y D. C & Z

ANSWER: B

A ______ operation is used to produce a contoured surface. A. Turning B. Profiling C. Facing D. None of the above

ANSWER: A

Automated CNC lathes and turning centers are faster, more accurate and more versatile than manual straight lathes. A. True B. False

ANSWER: A

Automated CNC lathes and turning centers are faster, more accurate, and more versatile than manual straight lathes. A. True B. False

ANSWER: A

CNC lathe applications turn bar stock material against a stationary cutting tool. A. True B. False

ANSWER: A

One advantage of soft jaws is that they are bored or turned on the actual machine. A. True B. False

ANSWER: A

Performing a dry run enables you to make sure the tool is not in danger of striking the CNC machine. A. True B. False

ANSWER: A

The ______ defines the thickness of the material being removed from the workpiece. A. Depth of cut B. Spindle speed C. Diameter D. Feed rate

ANSWER: A

Toolholders on the lathe can refer to: A. Round or square shanks that hold carbide inserts B. Clamps that hold the workpiece in the spindle C. Multi-point tools used for ID drilling D. None of the above

ANSWER: A

When using the HANDLE Jog Wheel, the machine is moving in specified "RESOLUTION" increments. A) True B) False

ANSWER: A

Which is NOT considered one of the three cutting variables? A. Length B. Depth of cut C. Feed D. Speed

ANSWER: A

A lathe with a bar feeder cannot stop automatically, unless it runs out of material. A. True B. False

ANSWER: B

A manufacturing process typically conducted on a lathe, in which a visually attractive diamond-shaped pattern is cut or rolled into metal is called: A. Facing B. Knurling C. Tapering D. Threading

ANSWER: B

On a lathe, the axis which would control the diameter of the part as it is being cut is the ____ axis. A. C B. X C. Y D. Z ANSWER: B

ANSWER: B

RESET will clear Low Pressure ALARM even if required PSI is not achieved. A. True B. False

ANSWER: B

Single block mode allows an operator to: A. Run the program uninterrupted from start to finish B. Verify a program one line at a time C. Machine parts much more rapidly D. Manually move the cutting tool into position.

ANSWER: B

The _____ defines the speed at which the workpiece spins. A. Depth of cut B. Spindle speed C. Diameter D. Feed rate

ANSWER: B

Tool turrets have the same size and number of tool pockets, regardless of lathe size. A. True B. False

ANSWER: B

What function will pause the program at key points to allow for an operator to measure a workpiece? A. Block delete B. Optional stop C. Machine overrides D. Cycle stop

ANSWER: B

A machine operator will most likely use Manual Data Input (MDI) mode to: A. Edit the part program B. Create a part program C. Enter and execute a line of code D. Turn the machine on or off

ANSWER: C

Overrides are used to: A. Extend tool life B. Maximize a threading operation C. Adjust machine variables D. None of the above

ANSWER: C

The ________ may need to be emptied prior to machine start-up. A. Coolant Tank B. Oil Reservoir C. Chip Bin

ANSWER: C

The major difference between the chucker and the bar machine is _____. A. The number of required machine operators B. The speeds each machine can achieve C. The type of stock they machine D. The power required by each machine

ANSWER: C

Which axis is positioned along the part length? A. X B. Y C. Z

ANSWER: C

The _______ defines the speed that the tool moves. A. Depth of cut B. Spindle speed C. Diameter D. Feed rate

ANSWER: D

In absolute programming, each tool movement is relevant to the workpiece origin. a. True b. False

ANSWER:A

On a LATHE, feed rate is most often programmed as _____. a. Feed per revolution (IPR in inch mode) b. Feed per minute (IPM in inch mode) c. Both feed per minute and feed per revolution d. RPM

ANSWER:A

Programs can be manually entered into the MDI. a. True b. False

ANSWER:A

The air in the pressure tank as well as the hoses must be kept as dry as possible to prevent lubrication problems. a. True b. False

ANSWER:A

What does the semicolon symbol represent with CNC machines and basic addresses? a. It is used at the end of each program block. b. It is used to skip program blocks. c. It is used for comments and messages in front of the program. d. It is used to indicate program number for ISO standard.

ANSWER:A

Basic functions of cutting fluids? (choose all that apply) a. Chip Removal b. Cooling c. Heating d. Lubricating e. Drying

ANSWER:A,B,D

A manufacturing process in which a visually attractive diamond-shaped pattern is cut or rolled into metal is called _____. a. Threading b. Knurling c. Tapering d. Facing

ANSWER:B

Lathe size is determined by the _____. a. total number of required machine operators b. fastest speed the machine can achieve c. swing and length of the bed d. None of the above

ANSWER:C