HAAS Mill Certification Practice Test

These questions are part of the practice quiz. Start practicing

• Which statement about interchangeable parts via CNC is true?
• The Handle Jog key is used to move which components?
• What does pressing Cycle Start do in a CNC program?
• G-codes are best described as
• If the coolant concentration is not correct, you should:
• Running the correct coolant type and the correct concentration allows:
• The work offsets in the machine define
• A steel ruler used in a machine shop is commonly referred to as a:
• After clearing the majority of chips and stopping with Emergency Stop, you should use the airgun to blow coolant off the table, vise, and fixtures.
• Cleaning the fixture or workholding device is critical. By not properly cleaning the workholding, you run the risk of:
• Blueprints are commonly referred to as drawings and tell a machinist how to make a part, what is critical about the part, and the material you need to make it from.
• Which statement describes the Program Button?
• An endmill rotates on its center axis and is designed to cut with the side of the tool, so that the cut surface is parallel to the axis of rotation.
• Watching the Haas Certification videos is a good first step to learning the basics about CNC machines. However, there is nothing better than hands-on experience. Be sure to contact _____________ to arrange time in front of a Haas CNC machine.
• What does 'one-thou' stand for?
• In the code line M03 S2000, S represents
• After clearing chips, what checks should be performed?
• The Home Position on a CNC machine is defined as:
• What is the primary function of a mill vise in milling operations?
• When using the airgun, never point it directly into the nose of the spindle.
• After you have cleared out the majority of chips from the enclosure, you should push the Emergency Stop button, and then use the airgun to blow puddles of coolant off the table, vise, and workholding fixtures.
• What is the primary purpose of a leader line on a drawing?
• During startup, the normal control screen should appear and the red E-Stop light should illuminate. Which option best reflects this sequence?
• The Offset button ___________?
• Which three items are recommended to be checked regularly in the spindle assembly?
• The operator on a manual milling machine does not need to be precise with the handle movements to control the distance and the depth of each cut? True or False?
• What information does the Program Button display?
• It is not important to match the raw material you choose to machine the part from with the raw material call-out on the drawing.
• Prior to CNC machines, drilling holes in material was commonly done by:
• If anyone needs to work inside the machine enclosure, the E-Stop Button should always be engaged.
• The Override Section on the Control Keypad includes Spindle Override and Axis Override controls.
• Which statement about the Program Coordinate Display is true?
• What unloading step correctly describes the post-cut process?
• After the part is finished, which unloading procedure should the operator perform?
• Endmills with 4 or more flutes are excellent for cutting aluminum.
• When we say crash on a machine tool, we are primarily speaking of:
• When refilling the coolant tank, what is important?
• During machine setup, if you need to turn off the coolant, what should you do before producing parts again?
• What does pressing Recover achieve after a tool change interruption?
• If you lean into the machine enclosure to check a part in the vise and accidentally push the spindle head cover, what will the head cover button do?
• The Machine Coordinate System defines where the axes can move, and how far they have moved.
• Which statement about stainless steel's machining ease is true?
• What does the Coolant key do?
• A milling cutter whose primary function is to cut the top or face and has the cutting surface perpendicular to the axis is known as a
• The second line of text and code in the program is commonly:
• Leader lines on a drawing indicate the location of the feature based on what?
• What is the decimal equivalent of 3/8 inch?
• What is the primary purpose of a face mill?
• What does the number of digits to the right of the decimal point on a drawing typically indicate?
• If the cutting tool is in the middle of a cut, and you hear a noise unfamiliar, the best action is to press:
• During cutting, which visual check is important?
• Which statement best explains the purpose of estimating run time based on parts and production rate?
• Spindle Warm-Up Cycle interval.
• The 3 axes are X, Y, and Z. When all three axes are at 0.000 in the Machine Coordinate System, what is that position commonly called?
• What does the code line M03 S2000 do?
• Which statement about aluminum alloys is supported by the material?
• On a standard scale (ruler or inspection tool), what is the term for each line?
• With electric, handheld drills, the operator still controls the quality of the hole being drilled.
• In milling terminology, an endmill is best described as:
• During loading, which surfaces should the workpiece be located against before tightening the vise?
• When clamping a part into a vise, you should be 100% sure the part is clamped tight enough to ensure it will not come out while the machine is cutting. This statement is:
• Many shops power down machines nightly. The main circuit breaker is commonly left in the ON position when powered down. This statement means:
• On the face of the drawing, there is a specific section for NOTES. Where on the drawing are the NOTES typically located?
• If the machine looks like it is about to crash, or it has already crashed, you should:
• Which M codes control the coolant in the Haas control?
• Parts produced by a CNC program are expected to be identical from one day to the next.
• Some milling cutters are designed only for 'roughing' material, and when you see slots or grooves on a milling cutter, that indicates that the cutter is a roughing endmill.
• When the table is positioned with both X and Y axes at the Zero position, movement in either the X or the Y axis is in the positive direction. True or False?
• When the machine is running, there are three ways to stop the machine: press Feed Hold, press the Reset button, or hit Emergency Stop.
• The most common cutting tool used in manufacturing is a drill bit.
• What is the recommended action if you observe wear on pull studs?
• If 25.4 millimeters equals 1 inch, what is the size in inches of 25.4 millimeters?
• Where are the electronics for a CNC machine typically located?
• The Override Section is important for both the Operator and the setup person, indicating its controls are intended for multiple users.
• A good measuring tool to check threaded features on a part is a Thread Gauge or Thread Plug Gauge. True or False?
• What is a likely consequence of insufficient air pressure entering the machine?
• What is the #1 cause of mistakes when using micrometers?
• To disengage the E-Stop and resume operation, which sequence is correct?
• A thread gauge is appropriate for checking threaded features on a part. True or False?
• The recommended order for clearing chips is to wash down the table and waycovers, stop with Emergency Stop, then use the airgun.
• Clearing chips from the machine enclosure allows the coolant to run freely back to the coolant tank for use.
• After pressing Feed Hold or E-Stop, what is the recommended first step before resuming operation?
• A Fraction-Decimal Conversion Chart in the shop is helpful.
• Which sequence correctly describes the Haas machine startup process?
• Which of the following best describes the sound of a good cut?
• Which statement best describes a fixture's locating feature?
• Which quadrant is the Override Section on the Control Keypad?
• Calipers are well-suited for inner hole measurements, except when the hole size is below what value?
• Coolant level and coolant concentration ratio should be checked regularly. What is the correct interval for checking the coolant?
• During startup, after diagnostics complete, the normal control screen appears and the red E-Stop light on the pendant illuminates. This describes:
• What is the best position for the Operator when blowing off the part and the workholding fixture?
• Which aluminum alloy series are mentioned as examples alongside 6061?
• One of the most popular Haas machines today is:
• When moving the axes individually, what is the recommended starting jogging speed value?
• Typically, thread mill cutters are designed to cut threads on the outside diameter of your workpiece, or internal threads on large-diameter holes.
• Which control feature lets the operator advance the program one line at a time?
• One of the tool release buttons is located on the control keypad. Where is the other tool release button located?
• One of the most common material types in a machine shop is aluminum. Two characteristics of aluminum are: Very light weight and not prone to rusting.
• True/False: Every workpiece in a job run must be located in the same position every time you load the vise.
• Once you have the new workpiece loaded into the vise, and have verified it is in the correct position, the next step is:
• The CNC machine allows modern manufacturers to repeatedly make parts that are essentially identical. This concept is known as component or part interchangeability. True or False?
• For inch micrometers, the main graduations on the main sleeve are:
• The basic milling machine is capable of moving in how many directions?
• Which condition on the pull studs indicates replacement should be considered?
• Taps with straight flutes push the cut material or chips down through the hole. These straight fluted taps are best for:
• Both G- and M-codes can have letter addresses in the line of code that provide additional instructions to the machine.
• Inside the machine, you will often find an auger or a conveyor for removing chips. Never put your hands near either of these devices.
• Which of the following is a typical cutting tool used on a manual milling machine?
• M-codes are best described as
• Chips are building up inside the machine enclosure. Clearing chips frequently will reduce wear on the waycovers and wipers.
• There is no need to quickly check the raw material for basic shape and overall size to ensure it is correct.
• The Haas Control is the computer system that runs the Haas machine. True or False?
• Which statement accurately reflects safe handling around augers or conveyors inside the machine?
• Before blowing off the workpiece and fixture, what is the recommended action regarding the machine doors?
• What is the decimal value for 1/2 inch?
• On an inch micrometer, where are the main graduations read from?
• After pressing the E-Stop button, which procedure resumes operation?
• In a hole feature callout, the presence of 2X or 4X indicates what?
• Tolerance specifies what about a feature?
• If the air pressure is too low, this may cause the machine to malfunction, and you may see a Low-Pressure Alarm on the Haas control.
• The Title Block typically lists the Company Name, the Drawing or Part Number, the Revision Level, and the Tolerance Callouts.
• Which action does the Reset button perform?
• During startup, the Operator will press which button to power the machine?
• What is the purpose of the Rapid Override feature?
• Which keys on the control panel allow the Operator to change the speed of rapid movements in the program?
• The Override Section is important for both the Operator and the setup person.
• For the Z axis, the Zero position is with the spindle all the way up, or at the top of travel. When the spindle is moved down, toward the table, the Z axis gets more negative. True or False?
• A sudden change in the cut surface appearance may indicate that something is wrong. True or False?
• Which tool is used to mill threads by forming internal threads?
• If you detect a problem or a potential crash while the machine is running, you should press Emergency Stop.
• Which instrument is described as among the most versatile inspection tools?
• In hole feature notation, what does 2X indicate?
• Engineering drawings offer two standard ways to display views: Third angle projection or first angle projection.
• Which best describes the production benefit of CNC machines?
• Cold-rolled steel is the same as hot-rolled steel, but put through additional processing.
• The Program Coordinate Display will treat our workpiece as our new zero starting point.
• It is important to be able to estimate how long a job will run, based on the total number of parts needed and how many you can run per hour or day. True or False?
• When the machine is set up, what does that mean?
• The Recover key is used when the machine is stopped and the tool-change arm is in the middle of a tool change.
• The use of Feed Hold puts the machine into a hold or pause mode, and remains in that mode until you press Cycle Start.
• End-of-day preparation: which action is recommended?
• True or False: Jog Lock can be used for long jog moves.
• What direction is the X-axis movement?
• There are two basic types of function codes used in CNC programming. Those code types are G and M codes.
• CNC stands for:
• The common language used to tell computerized machine tools how to make things is
• When using the tail of a caliper to measure depth, corner radiuses can throw off your measurement. Which statement is true?
• The speed of the axis movement when using the Jog Lock key is controlled by the last increment key that was pressed in the Hand Jog Mode section.
• What action should you take if pull studs on the end of the toolholder appear dinged or worn?
• What is the smallest division on a typical tape measure?
• The primary function of an Endmill is for profiling a part, or creating pockets in a part.
• What is a key property of the fit between the workpiece and the vise?
• The Reset key does the following.
• Stainless steel is known for its toughness and non-rusting characteristics.
• The common format for a part drawing divides the drawing into zones. These zones are:
• For small holes, a good inspection tool is:
• Which instrument is most commonly used to measure inside diameters of holes?
• Leaving large piles of chips in a machine, particularly steel or iron chips, will lead to rust inside the CNC machine.
• Blueprints are used to communicate to machinists what is critical about a part, including the material you need to make it from.
• Which statement best describes the Endmill's common usage in CNC milling?
• Often, the list of cutting tools needed for this particular program will be listed. True or False
• After the machine is set up and the vise, tools, and workpiece positions are known, what is needed to begin?
• If the finished part is rectangular in shape, the most likely shape of the raw material is:
• Why is it important to perform a quick check on raw material shape and size before starting?
• At the back of the machine is the control cabinet. This is where the majority of the electronics for the machine are. You should NEVER open the control cabinet.
• When establishing work offsets, the distance between the tip of the tool and the face of the spindle is called
• To view the list of alarm codes on a Haas control, you should press which key?
• The coolant tank fluid level should be checked once a week.
• Which statement is true about aluminum alloys commonly used in machine shops?
• Which key allows moving the axes individually?
• 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.
• Which statement correctly describes the use of drill and tap tools in milling?
• Which of the following represents 5/8 as a decimal?
• On CNC equipment, the machine is following a program that tells the machine what to do. True or False?
• G-codes tell the machine how to behave or what to do. What do the M-codes do?
• Which tool would you use to create a 45-degree chamfer?
• During setup, which action helps ensure proper workholding?
• Mild steels are: Typically on the hard side of the hardness spectrum.
• If you push the spindle head cover while leaning into the enclosure, the tool-release button will drop the tool out of the spindle. This action is:
• Is it permissible to press Cycle Start when the program and tools are already loaded to run the machine?
• After the machine is set up, what is the next essential step to begin production?
• It is important to check the incoming air every day. The air coming into the machine must be:
• The 4 keys to the right of the Mode keys control what you can do within each of the Mode keys.
• What is the most common aluminum alloy in machine shops?
• Spindle taper should be free of chips, dings, and fretting marks.
• Which of the following statements is supported by the material?
• Chips accumulate inside the machine enclosure over the day. Clearing chips frequently reduces wear on the waycovers and wipers. Which statement is correct?
• If a drawing is the same size as the actual part, what is the scale called?
• When using calipers to measure an outside diameter, which guideline is correct?
• It is extremely important to wear safety glasses at all times, especially when blowing off parts and chips in the machine. This statement is:
• Which statement about coolant handling is correct?
• The most common materials you will encounter when first starting out in a job shop are: mild steel, aluminum, stainless steel and alloy steel.
• Water in the air lines going to the machine is normal, and nothing to be concerned about.
• If a drawing includes more than one detailed view, each will be labeled with letters such as Detail A, Detail B.
• For extended shutdown, what action is recommended?
• In CNC machining, the machine operations are driven by a program. The machine follows a program that tells it what to do. True or False?
• The last group of common cutting tools are for cutting threads. The two basic types are:
• What does 'one-thou' refer to?
• When using a caliper, what precaution should be taken before use?
• Is it important to convert fractions to decimals in the machine shop environment?
• The Jog Lock function can cause the spindle to crash into a fixture or workpiece if the Z negative key is used.
• On the manual milling machine, one of the primary cutting tools is:
• Which two types of scales are common when dealing with inches in a machine shop?
• Before the threading procedure is done with a tap, the respective hole must be drilled to a specific size to match the size of the tap.
• What is the number 1 cause of injury in a machine shop?
• What is the preferred Rapid Override speed when you are running your first part in a batch?
• At the start of the workday, the machine should be clean and clear of chips on the waycovers and table BEFORE starting to run parts. This is:
• Which statement best describes the relationship between CNC and program control?
• When you have chosen the Handle Jog button, the suggested button (increment) for axis movement is: .001
• Specific endmills are designed to cut specific materials.
• This video outlined the minimum math skills you will need to work in a machine shop. For additional math skills, we suggest that you:
• The startup air pressure range is 50-65 psi. This statement is:
• When it comes to sheet and plate stock made from mild steels, hot-rolled and cold-rolled are used often. The surface finish on hot-rolled steel is:
• When the first part is completed, the Operator needs to load the next blank into the vise. Which sequence of steps will the Operator perform?
• When you start the machine, pressing the Power Up key does what?
• What is the decimal equivalent of 7/8 inch?
• It is very important that the Operator watch the first part being machined.
• Which action is used to pause the machine without exiting the program, allowing later resumption?
• Which is the only action to completely stop all machine motion in an emergency?
• Where is the coolant tank typically located in relation to the machine?
• Where is the main circuit breaker located on the machine?
• What does the tolerance on a drawing specify?
• Which two tools are commonly used together to drill and tap holes in a milling operation?
• Which material is NOT listed as a common beginner material in a job shop?
• When the Metric System is in use in the machine shop, the size of the part is usually shown in:
• There are three steps to keep in mind when blowing off the workpiece and fixture. What are the correct three steps?
• Crashing a CNC machine results in downtime for the machine, and can be very costly to the shop owner.
• What does the Feed Hold button do?
• When considering fixture design, which two capabilities must the fixture provide?
• Mild steels are typically on the hard side of the hardness spectrum.
• Which axis does the bottom of the vise locate the workpiece along?
• Cutting tools are razor sharp. When handling the cutting tool, you should firmly wrap your hand around the cutting tool surface.
• Engineering drawings offer two ways to display views of a part. Those two views are:
• Indexable drills are:
• 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.
• If there is a problem after starting the cycle, where should your hands be?
• The digits to the right of the decimal indicate what about the dimension?
• Which tool is used to cut threads?
• How many millimeters are in one inch?
• When the Operator is going to run the first part of a batch of parts, they should:
• One of the differences between Emergency Stop and Feed Hold is that with Feed Hold, all machine motion stops.
• Where is the second tool release button located?
• During production, is it OK to walk away from the machine when parts start running?
• Which code is used to start the spindle?
• Which statement about E-stop usage is correct?
• What is described as the best way to learn the basics about CNC machines?
• Two main components common to all machine fixtures?
• When it is time to get started running parts, which four items are best matched to the correct steps?
• During an alarm state, pressing the Reset key will:
• Some machine shops require Operators to press E-Stops when the Operator leaves his/her machine for extended periods.
• The first number you will see in the program that is running in the control is:
• Which key toggles the flood coolant system on Haas controls?
• What is the correct approach to seating the workpiece in the vise during loading?
• Most common workholding device?
• What should you do with spills at the end of your shift?
• If the Operator hears a strange noise coming from the machine, it is recommended to:
• What does the Reset key do on a Haas control?
• Endmills that have more than 5 flutes are primarily designed for creating excellent surface finishes on your workpiece.
• Cold-rolled steel is the same as hot-rolled steel, but put through additional processing.
• Specific endmills are designed to cut specific materials. Endmills with 2 or 3 flutes are primarily designed to cut _____.
• What term describes each number printed on a technical drawing that specifies size or location?
• The thousandths graduations are etched onto the 'thimble' section of the micrometer. True or False?
• Section Views on a drawing are displayed by a dashed line across the surface of any view. This 'Section View' will give the Operator the view of the internal details of features that are within the body of the part.
• If any chips are found in the spindle taper, you should:
• The quickest way to stop a machine in an emergency is:
• If you encounter an Alarm without an obvious cause, how can you obtain its description?
• Where is a good place to gain familiarity with CNC machines?
• At the end of your shift or for the weekend, you should clean your workspace, put away your tools, and clean up any spills.
• The Operator can adjust feedrate or the spindle override keys without his Supervisor's approval or request.
• Which statement is true about roughing endmills?
• The four keys to the right of the Mode keys are used to do what?
• Is it safe to enter the machine enclosure while the machine is powered on as long as the E-stop has been engaged?
• The coolant tank is commonly behind or to the side of the machine, and coolant leaks around the tank are not concerning.
• Which statement best describes the relationship between fractions and decimals in the shop?
• The Home Position is defined as the position where all three axes read zero. Which option correctly names this?
• The bottom of the vise locates the workpiece for which axis?
• The Work Coordinate System tells the machine where the work piece and the tools are in relation to the Machine Coordinate System.
• The proper safety practice when using the airgun is to never point it directly into the spindle nose.
• Removing the chips from the machine enclosure allows the coolant to run freely back to the coolant tank for use. True or False?
• What is a typical reason to observe the first part during its machining?
• There is no need to clean out the chips several times during the workday.
• Why are hard jaws called hard jaws?
• A common name used for manual milling machines is:
• 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:
• 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.
• Only use clean, precision-ground toolholders in the spindle.
• When loading a new part into the workholding vise or fixture, what are the correct steps?
• Which phrase best defines the Home Position on a CNC machine?
• Regular checks of spindle taper, toolholders, and pull studs should be performed at which interval?
• A manual milling machine differs from a drill press because it has handles that move the table side to side and up and down. True or False?
• Stainless steel is also known for its ease of machining.
• In the thread callout 1/4-20, the 20 stands for:
• Once the required tasks on the control screen are completed, the machine returns to its Home Position when you press which control?
• The Operator can use the keys in the Spindle and Axis Override Section whenever he/she wants.
• The machine shop world works primarily in decimals.
• The Display and Mode section of the control keypad is what you see in the upper two quadrants of the display screen.
• Calipers are great for measuring the inside diameters of holes, except when which condition applies?
• If the flutes spiral around the tap, much like a twist drill, the chips cut by the tap will come out the top of the hole. These taps are primarily designed for:
• Which statement about coolant use when cutting aluminum is true?
• A benefit of using Feed Hold is that the machine does not return to the first line of code in the program, but retains its position wherever you paused the machine motion.
• Which of the following is NOT listed as one of the three basic G-codes?
• The Recover key is used when the machine is stopped and the tool-change arm is in the middle of a tool change.
• Mild steel is the most common material that machine shops use in machining.
• The function of the face mill is:
• Which control panel feature allows you to advance through the program one line at a time?
• When clearing the chips from the machine, it is first important to clear the chips from the table and the waycovers using the washdown hose.
• The last quadrant of the Control Keypad is the Override Section.
• Which statement about water in the air lines is correct?
• An endmill that has a full 45-degree angle on the tip of the tool is known as a
• If the machine gets interrupted during a tool change, pressing the Recover key allows the machine to complete the tool change, and return the tool changer to Home position.
• Alloy steels are stronger, tougher, and harder than mild steels.
• Which statement about the Reset key is true?
• What does the Emergency Stop Button do?
• What is a key production advantage of CNC machines?
• Section Views are used to provide the operator with the view of the internal details of features within the body of the part.