HAAS MILL CERTIFICATION LATEST 2026 TEST PAPER
QUESTIONS AND SOLUTIONS GUARANTEE A+
✔✔One of the differences between Emergency Stop and Feed Hold is that with Feed
Hold, all machine motion stops. True or False - ✔✔False
✔✔A benefit of using Feed Hold is: - ✔✔The machine does not return to the first line of
code in the program, but retains its position wherever you paused the machine motion
✔✔The use of Feed Hold puts the machine into a hold or pause mode, and remains in
that mode until you press Cycle Start. True or False - ✔✔True
✔✔If you press Feed Hold or E-Stop, it is extremely important to contact your
Supervisor before resuming operation, to ensure you get back up and running safely.
True or False - ✔✔True
✔✔The Reset key gets used a lot on a Haas control. The Reset key: - ✔✔Exits all alarm
states, including those generated when you press E-Stop
✔✔Any time you encounter an Alarm that does not have an obvious cause, you can get
a description of the Alarm by pushing: - ✔✔Alarm key, and scrolling through the Alarm
Codes
✔✔When you walk up to a machine, you may discover that the program and tools are
already in the machine. If so, it is perfectly fine to press Cycle Start to get the machine
running: True or False - ✔✔False
✔✔An important key we need to know is Recover. The Recover key is used: - ✔✔When
the machine is stopped and the tool-change arm is in the middle of a tool change
✔✔Another control key that we will use is the Coolant key. By pressing the Coolant key,
the Operator will turn on/turn off the flood coolant system. True or False - ✔✔True
✔✔The coolant system is turned on and off in the program by using two M codes.
Those M codes are: - ✔✔M08 and M09
✔✔There will be numerous occasions when you want to move the axes individually.
The key that allows this function is: - ✔✔The Handle Jog key
✔✔If you choose to move the axes individually, you will need to choose a jogging speed
for the table. The recommended starting key to press is: - ✔✔.001
,✔✔If you are making a long jog move, you can use the Jog Lock function. True or False
- ✔✔True
✔✔To use the Jog Lock function, press the Jog Lock key and then press the X, Y, or Z
direction keys. Be careful when using Jog Lock and the Z negative key, as you run the
risk of "crashing" the spindle into a fixture or workpiece mounted on the table. True or
False - ✔✔True
✔✔Blueprints are commonly referred to as drawings. The blueprints or drawings are the
method that engineers use to tell a machinist how to make a part, what is critical about
the part, the material you need to make it from, and more. True or False - ✔✔True
✔✔The common format for a part drawing divides the drawing into zones. These zones
are: - ✔✔Letters (A thru Z) on the bottom axis, and numbers (1-10) on the side axis
✔✔The drawing Title Block - which lists the Company Name, the Drawing or Part
Number, the Revision Level, the Tolerance Callouts, and more - is typically located in
_______ of the drawing. - ✔✔The lower right corner
✔✔On the face of the drawing, there is a specific section for NOTES. Where on the
drawing are the NOTES typically located? - ✔✔Lower left corner
✔✔A very important element of the drawing is the location of the Revision History Block
on the face of the drawing. The location of the Revision History Block on drawings is
the: - ✔✔Top right corner
✔✔It is not important for the machine Operator to identify the Revision Level on the
drawing and match that Revision Level to the program in the CNC machine. True or
False - ✔✔False
✔✔Engineering drawings offer two ways to display views of a part. Those two views
are: - ✔✔Third angle projection or first angle projection
✔✔Section Views on a drawing are displayed by a dashed line across the surface of
any view of the part on the drawing. This 'Section View' will give the Operator the view
of the internal details of features that are within the body of the part. True or False -
✔✔True
✔✔There may be several detailed views on a drawing. Each detailed view will be listed
with a separate letter, such as Detail A, Detail B, etc. True or False - ✔✔True
✔✔There are many numbers listed on the face of a drawing. Each number that you see
on a drawing is called a dimension. True or False - ✔✔True
, ✔✔The leader lines will signify the location of the feature based on a starting point
(such as a fixed edge of the part), or the actual endpoint of the feature (such as the
center of a hole in the part). True or False - ✔✔True
✔✔In the case of a drawing callout for a hole feature, you may see a 2X or a 4X. The
number and X simply note: - ✔✔How many times on the drawing that identical feature
exists
✔✔A "tolerance" on a drawing tells the machinist the amount and the direction that a
feature can deviate from a dimension on a drawing. True or False - ✔✔True
✔✔Each dimension on a drawing will have a varying number of digits to the right of the
decimal point. Generally speaking, the number of digits to the right of the decimal point
tells the machinist how critical that dimension is. True or False - ✔✔True
✔✔What does the term "one-thou" stand for? - ✔✔1/1000 of an inch or .001
✔✔On a standard scale (ruler, yardstick) or inspection tool, each line is also called a: -
✔✔Graduation
✔✔When a drawing of a part is the same size as the actual part, the scale is: - ✔✔1:1
✔✔When using a caliper, it is important to wipe clean the measuring faces prior to use.
True or False - ✔✔True
✔✔One of the most versatile pieces of inspection equipment to a machinist is: - ✔✔A
caliper
✔✔When using calipers to measure an outside diameter, you should remember to: -
✔✔Not push too hard, and keep the part as deep in the jaws as possible
✔✔When using the tail of a caliper to measure the depth of a feature, it is important to
watch out for corner radiuses that can throw off your measurement. True or False -
✔✔True
✔✔Calipers are great for measuring the inside diameters of holes, except when: -
✔✔The hole is smaller than .157 in diameter
✔✔What is the #1 cause of mistakes when using micrometers? - ✔✔Gorilla grip and
overtightening
QUESTIONS AND SOLUTIONS GUARANTEE A+
✔✔One of the differences between Emergency Stop and Feed Hold is that with Feed
Hold, all machine motion stops. True or False - ✔✔False
✔✔A benefit of using Feed Hold is: - ✔✔The machine does not return to the first line of
code in the program, but retains its position wherever you paused the machine motion
✔✔The use of Feed Hold puts the machine into a hold or pause mode, and remains in
that mode until you press Cycle Start. True or False - ✔✔True
✔✔If you press Feed Hold or E-Stop, it is extremely important to contact your
Supervisor before resuming operation, to ensure you get back up and running safely.
True or False - ✔✔True
✔✔The Reset key gets used a lot on a Haas control. The Reset key: - ✔✔Exits all alarm
states, including those generated when you press E-Stop
✔✔Any time you encounter an Alarm that does not have an obvious cause, you can get
a description of the Alarm by pushing: - ✔✔Alarm key, and scrolling through the Alarm
Codes
✔✔When you walk up to a machine, you may discover that the program and tools are
already in the machine. If so, it is perfectly fine to press Cycle Start to get the machine
running: True or False - ✔✔False
✔✔An important key we need to know is Recover. The Recover key is used: - ✔✔When
the machine is stopped and the tool-change arm is in the middle of a tool change
✔✔Another control key that we will use is the Coolant key. By pressing the Coolant key,
the Operator will turn on/turn off the flood coolant system. True or False - ✔✔True
✔✔The coolant system is turned on and off in the program by using two M codes.
Those M codes are: - ✔✔M08 and M09
✔✔There will be numerous occasions when you want to move the axes individually.
The key that allows this function is: - ✔✔The Handle Jog key
✔✔If you choose to move the axes individually, you will need to choose a jogging speed
for the table. The recommended starting key to press is: - ✔✔.001
,✔✔If you are making a long jog move, you can use the Jog Lock function. True or False
- ✔✔True
✔✔To use the Jog Lock function, press the Jog Lock key and then press the X, Y, or Z
direction keys. Be careful when using Jog Lock and the Z negative key, as you run the
risk of "crashing" the spindle into a fixture or workpiece mounted on the table. True or
False - ✔✔True
✔✔Blueprints are commonly referred to as drawings. The blueprints or drawings are the
method that engineers use to tell a machinist how to make a part, what is critical about
the part, the material you need to make it from, and more. True or False - ✔✔True
✔✔The common format for a part drawing divides the drawing into zones. These zones
are: - ✔✔Letters (A thru Z) on the bottom axis, and numbers (1-10) on the side axis
✔✔The drawing Title Block - which lists the Company Name, the Drawing or Part
Number, the Revision Level, the Tolerance Callouts, and more - is typically located in
_______ of the drawing. - ✔✔The lower right corner
✔✔On the face of the drawing, there is a specific section for NOTES. Where on the
drawing are the NOTES typically located? - ✔✔Lower left corner
✔✔A very important element of the drawing is the location of the Revision History Block
on the face of the drawing. The location of the Revision History Block on drawings is
the: - ✔✔Top right corner
✔✔It is not important for the machine Operator to identify the Revision Level on the
drawing and match that Revision Level to the program in the CNC machine. True or
False - ✔✔False
✔✔Engineering drawings offer two ways to display views of a part. Those two views
are: - ✔✔Third angle projection or first angle projection
✔✔Section Views on a drawing are displayed by a dashed line across the surface of
any view of the part on the drawing. This 'Section View' will give the Operator the view
of the internal details of features that are within the body of the part. True or False -
✔✔True
✔✔There may be several detailed views on a drawing. Each detailed view will be listed
with a separate letter, such as Detail A, Detail B, etc. True or False - ✔✔True
✔✔There are many numbers listed on the face of a drawing. Each number that you see
on a drawing is called a dimension. True or False - ✔✔True
, ✔✔The leader lines will signify the location of the feature based on a starting point
(such as a fixed edge of the part), or the actual endpoint of the feature (such as the
center of a hole in the part). True or False - ✔✔True
✔✔In the case of a drawing callout for a hole feature, you may see a 2X or a 4X. The
number and X simply note: - ✔✔How many times on the drawing that identical feature
exists
✔✔A "tolerance" on a drawing tells the machinist the amount and the direction that a
feature can deviate from a dimension on a drawing. True or False - ✔✔True
✔✔Each dimension on a drawing will have a varying number of digits to the right of the
decimal point. Generally speaking, the number of digits to the right of the decimal point
tells the machinist how critical that dimension is. True or False - ✔✔True
✔✔What does the term "one-thou" stand for? - ✔✔1/1000 of an inch or .001
✔✔On a standard scale (ruler, yardstick) or inspection tool, each line is also called a: -
✔✔Graduation
✔✔When a drawing of a part is the same size as the actual part, the scale is: - ✔✔1:1
✔✔When using a caliper, it is important to wipe clean the measuring faces prior to use.
True or False - ✔✔True
✔✔One of the most versatile pieces of inspection equipment to a machinist is: - ✔✔A
caliper
✔✔When using calipers to measure an outside diameter, you should remember to: -
✔✔Not push too hard, and keep the part as deep in the jaws as possible
✔✔When using the tail of a caliper to measure the depth of a feature, it is important to
watch out for corner radiuses that can throw off your measurement. True or False -
✔✔True
✔✔Calipers are great for measuring the inside diameters of holes, except when: -
✔✔The hole is smaller than .157 in diameter
✔✔What is the #1 cause of mistakes when using micrometers? - ✔✔Gorilla grip and
overtightening
