NIMS CNC OPERATOR TEST
Given an 18 ¾" length of stock, how many 2 ½'" pieces can be cut from it? - correct
answer-7.5 (18.75/2.5)
How often should you check the lubrication levels on a machine? - correct answer-Daily
On a blueprint, what do you call a dimension in a box (boxed dimension)? - correct
answer-Base
When should you wear your safety glasses in the shop? - correct answer-Always
What is the RPM formula for drilling? - correct answer-
What is the code for rapid traverse? - correct answer-G00
What is the code for linear feed (must have an F word with it)? - correct answer-G01
0. What is the code for program stop? - correct answer-M00
What is the code for optional stop? - correct answer-M01
What is the code for program end rewind? - correct answer-M30
What is the code for zero return? - correct answer-G28
What is the code for constant surface speed (SFM)? - correct answer-
What is the code for fixture offset (work offset #1)? - correct answer-
What is the code for incremental positioning? - correct answer-G91
What is the code for absolute positioning? - correct answer-G90
What is the code for inch mode? - correct answer-G20
What is the code for metric mode? - correct answer-G21
What is the code for tool change ON THE MILL? - correct answer-
What is the code for spindle activation clockwise OR FORWARD? - correct answer-M03
What mode would you select for changing a tool on a mill or lathe? - correct answer-M06
What is the difference between the 1.384 dimension and the .945 dimension? - correct
answer-
,- correct answer-
- correct answer-
- correct answer-
What screen gives you the information for height offset value? - correct answer-
What mode on a CNC milling center would you select to send the machine home? - correct
answer-G28
If you were boring a hole specified at 2.125" deep with a tolerance of +/-.001 and measured
the part at 2.122" deep, what would you add or subtract from the Tool length offset to bore
the hole to proper depth? - correct answer-
A print calls out a finished part length of 3.25 inches. How long would you cut the stock for
each part if you leave 1/8" for sizing? - correct answer-
Which of the buttons below would you depress if you were using M01 in a program? - correct
answer-
. What button below would you push to manually input and physically execute programming
commands? - correct answer-
3. What button would you press to view the distance to go while running a program? -
correct answer-
The tolerance range is set on a dial indicator. If this dial indicator is checking the diameter of
a part turned on a lathe, what would you add or subtract from the geometry offset (X) to
machine the part at the mean dimension? - correct answer-
A part dimension states that the depth of a bored hole must be within .001" (+/- .0005).
When machining the first part how should the TLO (tool length offset) be set? - correct
answer-
You are milling a part using cutter diameter compensation. The part measures 2.004" after
the machining is done (using the .250" to 2.250 dimensions below). What must you do to the
cutter diameter value to cut the part to size? - correct answer-
. What considerations should you take into account when adding soluble oil to a CNC
machine? - correct answer-
You are turning a shaft and it measures 1.752" on the diameter, and the print calls out a
1.750" +/- .0005 diameter. What must you add or subtract in the geometry offset (X value) to
make the part cut to the dimension - correct answer-
On a standard CNC lathe, what is the axis that controls the diameter? - correct answer-x
,On a standard CNC lathe, what is the axis that controls length? - correct answer-Z
Why are machines homed (or sent to "zero return" position)? - correct answer-
Standing in front of a horizontal machining center, what axis moves toward and away from
you - correct answer-
While standing in front of a horizontal machining center, what is the axis that goes up and
down (toward the ceiling and floor)? - correct answer-
, NIMS Core CNC Milling Skills
1-2-3 block - correct answer-A precise metal block with dimensions measuring 25.4 mm,
50.8 mm, and 76.2 mm long, respectively. A ___ ___ can be used to touch off a tool during
calculation of tool length offset.
axes - correct answer-An imaginary line that passes through the center of an object. ___ are
used to measure the distances of objects in the Cartesian coordinate system.
Cartesian coordinate system - correct answer-A positioning system that uses three
perpendicular linear axes to locate positions in three-dimensional space. The ___ ___ ___'s
axes are the X axis, Y axis, and Z axis.
CNC - correct answer-Computer numerical control. A sophisticated machining device that
uses a computer to carry out machining operations. ___ machine tools are much more
sophisticated than their manual counterparts.
computer numerical control - correct answer-CNC. A sophisticated machining device that
uses a computer to carry out machining operations. ___ ___ ___ machine tools are much
more sophisticated than their manual counterparts.
contour - correct answer-A curved surface or dimension that is cut into a workpiece.
Contours can be affected by the dimensions of the cutting tool if CRC is not used.
CRC - correct answer-Cutter radius compensation. An offset that accounts for variations in
tool diameter. CRC is only necessary for tools that continuously cut along a horizontal plane.
cutter radius compensation - correct answer-CRC. An offset that accounts for variations in
tool diameter. Cutter radius compensation is only necessary for tools that continuously cut
along a horizontal plane.
diameters - correct answer-The distance from one edge of a circle to the opposite edge
across its widest point. Tool diameters must be accounted for with cutter radius
compensation.
drills - correct answer-A multi-point cutting tool used to make round holes. Drills are usually
made from high-speed steel and cemented carbides.
edge finder - correct answer-A device used to locate the exact position of a part edge along
the X axis or Y axis. Edge finders determine workshift offsets.
end mills - correct answer-A milling cutter that cuts with its bottom and side edges. End mills
can be used to machine grooves, slots, circular slots, and pockets, among other features.
fixture - correct answer-A customized device that is used to position and hold a workpiece in
place. Fixtures are normally used to machine flat surfaces parallel to the table on a CNC mill.
Given an 18 ¾" length of stock, how many 2 ½'" pieces can be cut from it? - correct
answer-7.5 (18.75/2.5)
How often should you check the lubrication levels on a machine? - correct answer-Daily
On a blueprint, what do you call a dimension in a box (boxed dimension)? - correct
answer-Base
When should you wear your safety glasses in the shop? - correct answer-Always
What is the RPM formula for drilling? - correct answer-
What is the code for rapid traverse? - correct answer-G00
What is the code for linear feed (must have an F word with it)? - correct answer-G01
0. What is the code for program stop? - correct answer-M00
What is the code for optional stop? - correct answer-M01
What is the code for program end rewind? - correct answer-M30
What is the code for zero return? - correct answer-G28
What is the code for constant surface speed (SFM)? - correct answer-
What is the code for fixture offset (work offset #1)? - correct answer-
What is the code for incremental positioning? - correct answer-G91
What is the code for absolute positioning? - correct answer-G90
What is the code for inch mode? - correct answer-G20
What is the code for metric mode? - correct answer-G21
What is the code for tool change ON THE MILL? - correct answer-
What is the code for spindle activation clockwise OR FORWARD? - correct answer-M03
What mode would you select for changing a tool on a mill or lathe? - correct answer-M06
What is the difference between the 1.384 dimension and the .945 dimension? - correct
answer-
,- correct answer-
- correct answer-
- correct answer-
What screen gives you the information for height offset value? - correct answer-
What mode on a CNC milling center would you select to send the machine home? - correct
answer-G28
If you were boring a hole specified at 2.125" deep with a tolerance of +/-.001 and measured
the part at 2.122" deep, what would you add or subtract from the Tool length offset to bore
the hole to proper depth? - correct answer-
A print calls out a finished part length of 3.25 inches. How long would you cut the stock for
each part if you leave 1/8" for sizing? - correct answer-
Which of the buttons below would you depress if you were using M01 in a program? - correct
answer-
. What button below would you push to manually input and physically execute programming
commands? - correct answer-
3. What button would you press to view the distance to go while running a program? -
correct answer-
The tolerance range is set on a dial indicator. If this dial indicator is checking the diameter of
a part turned on a lathe, what would you add or subtract from the geometry offset (X) to
machine the part at the mean dimension? - correct answer-
A part dimension states that the depth of a bored hole must be within .001" (+/- .0005).
When machining the first part how should the TLO (tool length offset) be set? - correct
answer-
You are milling a part using cutter diameter compensation. The part measures 2.004" after
the machining is done (using the .250" to 2.250 dimensions below). What must you do to the
cutter diameter value to cut the part to size? - correct answer-
. What considerations should you take into account when adding soluble oil to a CNC
machine? - correct answer-
You are turning a shaft and it measures 1.752" on the diameter, and the print calls out a
1.750" +/- .0005 diameter. What must you add or subtract in the geometry offset (X value) to
make the part cut to the dimension - correct answer-
On a standard CNC lathe, what is the axis that controls the diameter? - correct answer-x
,On a standard CNC lathe, what is the axis that controls length? - correct answer-Z
Why are machines homed (or sent to "zero return" position)? - correct answer-
Standing in front of a horizontal machining center, what axis moves toward and away from
you - correct answer-
While standing in front of a horizontal machining center, what is the axis that goes up and
down (toward the ceiling and floor)? - correct answer-
, NIMS Core CNC Milling Skills
1-2-3 block - correct answer-A precise metal block with dimensions measuring 25.4 mm,
50.8 mm, and 76.2 mm long, respectively. A ___ ___ can be used to touch off a tool during
calculation of tool length offset.
axes - correct answer-An imaginary line that passes through the center of an object. ___ are
used to measure the distances of objects in the Cartesian coordinate system.
Cartesian coordinate system - correct answer-A positioning system that uses three
perpendicular linear axes to locate positions in three-dimensional space. The ___ ___ ___'s
axes are the X axis, Y axis, and Z axis.
CNC - correct answer-Computer numerical control. A sophisticated machining device that
uses a computer to carry out machining operations. ___ machine tools are much more
sophisticated than their manual counterparts.
computer numerical control - correct answer-CNC. A sophisticated machining device that
uses a computer to carry out machining operations. ___ ___ ___ machine tools are much
more sophisticated than their manual counterparts.
contour - correct answer-A curved surface or dimension that is cut into a workpiece.
Contours can be affected by the dimensions of the cutting tool if CRC is not used.
CRC - correct answer-Cutter radius compensation. An offset that accounts for variations in
tool diameter. CRC is only necessary for tools that continuously cut along a horizontal plane.
cutter radius compensation - correct answer-CRC. An offset that accounts for variations in
tool diameter. Cutter radius compensation is only necessary for tools that continuously cut
along a horizontal plane.
diameters - correct answer-The distance from one edge of a circle to the opposite edge
across its widest point. Tool diameters must be accounted for with cutter radius
compensation.
drills - correct answer-A multi-point cutting tool used to make round holes. Drills are usually
made from high-speed steel and cemented carbides.
edge finder - correct answer-A device used to locate the exact position of a part edge along
the X axis or Y axis. Edge finders determine workshift offsets.
end mills - correct answer-A milling cutter that cuts with its bottom and side edges. End mills
can be used to machine grooves, slots, circular slots, and pockets, among other features.
fixture - correct answer-A customized device that is used to position and hold a workpiece in
place. Fixtures are normally used to machine flat surfaces parallel to the table on a CNC mill.
