Question 1

Most modern CNC machines employ a high-tech modernized version of ways called ____.
A) linear guides
B) linear interpolation
C) modal interpolation
D) origin guides

Accepted Answer

Linear guides are the modernized version of ways used in most modern CNC machines. They offer higher accuracy, smoother operation, and faster speeds compared to traditional ways. Linear guides use rolling or sliding elements in a linear motion to guide the machine's movements.

Question 2

____ programming was developed to simplify the machine programming process.
A) Modal
B) Address
C) Conversational
D) Safe-start

Accepted Answer

Conversational programming is designed to simplify the process of machine programming by using a more user-friendly interface and natural language commands, making it easier for operators to create programs without requiring extensive knowledge of coding or G-code programming. Modal programming is a type of CNC programming that uses different modes or states to control machine functions, Address programming involves specifying the location of tool movements in a program, and Safe-start programming is a safety feature used to prevent machines from starting up when certain conditions are not met.

Question 3

____ traverse is designated by the code G0.
A) Circular
B) Linear
C) Modal
D) Rapid

Accepted Answer

G0 is the G-code used to designate a rapid traverse in CNC programming, which moves the tool quickly between points without cutting.

Question 4

When using ____ positioning, the coordinates of all positions will be referenced from the beginning.
A) absolute
B) polar
C) incremental
D) conversational

Accepted Answer

Absolute positioning references all positions from the beginning, while other positioning methods may reference positions relative to each other or to a specific starting point.

Question 5

CNC programming does not use north, south, east, or west to identify distance and direction, but instead a similar system called the ____ system.
A) absolute positioning
B) polar coordinate
C) Cartesian coordinate
D) incremental positioning

Accepted Answer

CNC programming uses the Cartesian coordinate system, which identifies distance and direction using the x, y, and z axis. Absolute positioning, incremental positioning, and polar coordinate systems are also used in CNC programming, but do not replace the Cartesian coordinate system.

Question 6

A(n) ____ assembly device consists of a screw and nut assembly with steel balls in place of threads.
A) block nut
B) linear guide
C) encoder
D) ball screw

Accepted Answer

The description fits that of a ball screw assembly, as it uses steel balls in place of threads to translate rotational motion into linear motion. A block nut and linear guide are not specific enough and do not involve the use of steel balls. An encoder is a device used to convert a physical position or motion into an electrical signal for control purposes and is not associated with a screw and nut assembly.

Question 7

____ coordinates require that positions be identified by defining both an angle and a distance (like a vector in mathematics).
A) Absolute
B) Incremental
C) Linear
D) Polar

Accepted Answer

Polar coordinates require the identification of a position using an angle and distance from a fixed point, also known as the pole. This is similar to how a vector is defined in mathematics. Absolute coordinates refer to a fixed point of reference, while incremental coordinates refer to the change in position from a starting point. Linear coordinates refer to a position along a single line.

Question 8

A(n) ____ motor is a hybrid electric motor with half motor/half position sensor.
A) modal
B) servo
C) block
D) encoder

Accepted Answer

A servo motor is a type of hybrid electric motor that uses both a motor and a position sensor to accurately control the position of the motor shaft. This makes them ideal for use in precision applications like robotics, CNC machines, and automation systems. The other options (modal, block, encoder) do not accurately describe this type of motor.

Question 9

The X- and Y-axes of the Cartesian coordinate system divides the system into four separate regions called ____.
A) dimensions
B) modals
C) quadrants
D) planes

Accepted Answer

The four separate regions of the Cartesian coordinate system are called quadrants. Quadrant I is located in the upper right-hand corner, Quadrant II in the upper left-hand corner, Quadrant III in the lower left-hand corner, and Quadrant IV in the lower right-hand corner.

Question 10

____-codes are used to turn on and off miscellaneous (auxiliary) functions.
A) G
B) M
C) F
D) A

Accepted Answer

M-codes are used for miscellaneous functions, such as turning on and off coolant, spindle control, and other auxiliary functions. G-codes are used for motion control, F-codes are used for feedrate control, and A-codes are not standard codes used in CNC programming.

Question 11

The ____ positioning system specifies a distance from the current position to the next position instead of a location related to the origin.
A) rectangular
B) incremental
C) circular
D) absolute

Accepted Answer

The incremental positioning system specifies a relative distance from the current position to the next position, rather than an absolute location related to the origin. This type of system is commonly used in robotics and automation. Rectangular positioning systems use X and Y coordinates, circular systems use polar coordinates, and absolute systems use predetermined locations and distances from a fixed origin.

Question 12

CNC mills with an ATC are called ____.
A) traverse mills
B) machining centers
C) turning centers
D) positioning mills

Accepted Answer

CNC mills with an Automatic Tool Changer (ATC) are known as machining centers. A machining center is a computer-controlled machine tool that can perform a variety of milling, drilling, threading, and boring operations automatically, with little or no operator involvement.

Question 13

Programming code that the machine can understand is called ____ address.
A) word
B) modal
C) encoded
D) traverse

Accepted Answer

Programming code that the machine can understand is converted into a series of binary digits or 1s and 0s, which represent machine language instructions that can be executed by the computer's CPU. These binary digits are grouped into words, with each word typically representing 8, 16, 32, or 64 bits of data. Therefore, the programming code that the machine can understand is referred to as machine language or machine code, which is usually represented in word addresses.

Question 14

Linear interpolation produces a(n) ____ line between two points.
A) curved
B) angled
C) arced
D) straight

Accepted Answer

Linear interpolation produces a straight line between two points.

Question 15

The CNC program is created and stored in the ____.
A) rectangular coordinate system
B) modal control unit
C) machine control unit
D) origin control system

Accepted Answer

The CNC program is created using computer software and is stored in the machine control unit. The program contains a set of instructions that control the movement of the machine's cutting tools, and the machine control unit interprets these instructions and directs the machine's motors and servos accordingly. The rectangular coordinate system is used to define the workpiece and tool positions in the program, but it is not where the program itself is stored. The modal control unit and origin control system are not commonly used terms in CNC machining.

Question 16

____-codes prepare a machine to engage in a particular mode for machining.
A) P
B) C
C) G
D) M

Accepted Answer

G-codes prepare a machine to engage in a particular mode for machining.

Question 17

A(n) ____ works by recording the amount of rotation a motor makes (in degrees).
A) guide
B) code
C) encoder
D) leader

Accepted Answer

An encoder is a device that measures the amount of rotation a motor makes in degrees. It does this by encoding the rotation into a digital signal that can be read and used for various applications. Options A, B, and D do not relate to measuring motor rotation.

Question 18

When a CNC lathe is equipped with an automatic tool changer it is called a ____.
A) turning center
B) modal center
C) servo motor
D) machining center

Accepted Answer

When a CNC lathe is equipped with an automatic tool changer, it is called a turning center. This term is commonly used in the industry to differentiate it from a basic CNC lathe that requires manual tool changes.

Question 19

The place a traveler begins from is called the point of ____.
A) foundation
B) origin
C) cause
D) source

Accepted Answer

The term "point of origin" is commonly used to refer to the place where a traveler or shipment begins its journey. The other options don't accurately capture this meaning.

Question 20

____ interpolation motion causes the cutter's path to travel in an arc.
A) Circular
B) Linear
C) Rapid
D) Modal

Accepted Answer

Circular interpolation motion causes the cutter's path to travel in an arc. Linear interpolation motion would result in a straight line path, rapid motion is simply the movement of the tool from one point to another at high speed, and modal refers to the current operating mode of the machine tool.

Quiz 8: Computer Numerical Control

Most modern CNC machines employ a high-tech modernized version of ways called ____.

____ programming was developed to simplify the machine programming process.

____ traverse is designated by the code G0.

When using ____ positioning, the coordinates of all positions will be referenced from the beginning.

CNC programming does not use north, south, east, or west to identify distance and direction, but instead a similar system called the ____ system.

A(n) ____ assembly device consists of a screw and nut assembly with steel balls in place of threads.

____ coordinates require that positions be identified by defining both an angle and a distance (like a vector in mathematics) .

A(n) ____ motor is a hybrid electric motor with half motor/half position sensor.

The X- and Y-axes of the Cartesian coordinate system divides the system into four separate regions called ____.

____-codes are used to turn on and off miscellaneous (auxiliary) functions.

The ____ positioning system specifies a distance from the current position to the next position instead of a location related to the origin.

CNC mills with an ATC are called ____.

Programming code that the machine can understand is called ____ address.

Linear interpolation produces a(n) ____ line between two points.

The CNC program is created and stored in the ____.

____-codes prepare a machine to engage in a particular mode for machining.

A(n) ____ works by recording the amount of rotation a motor makes (in degrees) .

When a CNC lathe is equipped with an automatic tool changer it is called a ____.

The place a traveler begins from is called the point of ____.

____ interpolation motion causes the cutter's path to travel in an arc.