Question 1

CAD/CAM is the relationship between
A)science and engineering
B)manufacturing and marketing
C)design and manufacturing
D)design and marketing

Accepted Answer

CAD/CAM stands for Computer-Aided Design and Computer-Aided Manufacturing, which directly links the design process with manufacturing operations, improving the transition from design to production.

Question 2

Which two disciplines are tied by a common database?
A)documentation and geometric modeling
B)CAD and CAM
C)drafting and documentation
D)none of the mentioned

Accepted Answer

CAD (Computer-Aided Design) and CAM (Computer-Aided Manufacturing) are tied by a common database, allowing for seamless transition from design to manufacturing.

Question 3

The term that is used for geometric modelling like solid modelling, wire frame modelling and drafting is known as
A)software package
B)operating system
C)application software
D)none of the mentioned

Accepted Answer

A

Question 4

The software that is used to control the computer's work flow, organize its data and perform housekeeping functions is known as
A)operating software
B)graphics software
C)application software
D)programming software

Accepted Answer

Operating software, more commonly known as operating system (OS), is responsible for managing computer hardware and software resources, organizing files, and facilitating the execution of other software.

Question 5

During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 the type of tool motion will be
A)circular Interpolation - clockwise
B)circular Interpolation - counter clockwise
C)linear Interpolation
D)rapid feed

Accepted Answer

The code "G02" indicates circular interpolation in a clockwise direction, which means the tool will move in a circular path around a specified center point or radius in a clockwise manner.

Question 6

In an NC machining operation, the tool has to be moved from point (5, 4) to point (7, 2) along a circular path with centre at (5, 2). Before starting the operation, the tool is at (5, 4). The G and N codes for this motion are
A)N010 GO3 X7.0 Y2.0 I5.0 J2.0
B)N010 GO2 X7.0 Y2.0 I5.0 J2.0
C)N010 GO1 X7.0 Y2.0 I5.0 J2.0
D)N010 GOO X7.0 Y2.0 I5.0 J2.0

Accepted Answer

The correct G-code for moving in a circular path is G02 for clockwise motion or G03 for counterclockwise motion. Given the center of the circle at (5, 2) and the movement from (5, 4) to (7, 2), the direction is clockwise when viewed from the positive side of the Z-axis. Therefore, G02 is the correct code. The I and J parameters typically denote the distance from the starting point to the center in the X and Y directions, respectively, but in this context, they are not needed or are incorrectly applied, as G02 and G03 commands use I and J for radius or center offset values, not absolute positions. The correct command should specify the end point and possibly the radius or the direction of the arc, but the given options do not accurately represent how I and J are used. Despite this, based on the options provided and the need for a clockwise arc, option B is the closest correct choice.

Question 7

The tool of an NC machine has to move along a circular arc from (5, 5) to (10, 10) while performing an operation. The centre of the arc is at (10, 5). Which one of the following NC tool path command performs the above mentioned operation?
A)N010 GO2 X10 Y10 X5 Y5 R5
B)N010 GO3 X10 Y10 X5 Y5 R5
C)N010 GO1 X5 Y5 X10 Y10 R5
D)N010 GO2 X5 Y5 X10 Y10 R5

Accepted Answer

The correct command is N010 GO2 X10 Y10 X5 Y5 R5. This command specifies a circular arc movement from the current position (5, 5) to the end point (10, 10), with the center of the arc at (10, 5) and a radius of 5.

Question 8

Match the following: NC code Definition P. M05 1. Absolute coordinate system Q. G01 2. Dwell R. G04 3. Spindle stop S. G09 4. Linear interpolation
A)P-2, Q-3, R-4, S-1
B)P-3, Q-4, R-1, S-2
C)P-3, Q-4, R-2, S-1
D)P-4, Q-3, R-2, S-1

Accepted Answer

M05 corresponds to spindle stop, G01 to linear interpolation, G04 to dwell, and G09 is not typically associated with absolute coordinate system.

Question 9

In a CNC program block, N02 GO2 G91 X40 Z40……, GO2 and G91 refer to
A)circular interpolation in counter clockwise direction and incremental dimension
B)circular interpolation in counter clockwise direction and absolute dimension
C)circular interpolation in clockwise direction and incremental dimension
D)circular interpolation in clockwise direction and absolute dimension

Accepted Answer

C) is correct because G02 indicates circular interpolation in a clockwise direction, and G91 specifies that dimensions are to be interpreted in an incremental manner from the last position.

Question 10

Numerical control
A)applies only to milling machines
B)is a method for producing exact number of parts per hour
C)is a method for controlling by means of set of instructions
D)None of the mentioned

Accepted Answer

Numerical control (NC) refers to the automation of machine tools that are operated by precisely programmed commands encoded on a storage medium, as opposed to controlled manually by hand wheels or levers, or mechanically automated by cams alone. It is a method for controlling machine tools through the use of instructions encoded in a digital form, which applies to a wide range of machinery, not just milling machines.

Question 11

Computer will perform the data processing functions in
A)NC
B)CNC
C)DNC
D)None of the mentioned

Accepted Answer

CNC (Computer Numerical Control) systems use computers to control machining or manufacturing processes. Unlike NC (Numerical Control) which is programmable automation without a computer, CNC involves the use of a computer to control machine tools for manufacturing complex parts. DNC (Direct Numerical Control) involves the control of multiple machine tools by a single computer through direct connection or via a network, but the primary function is the management and communication between machines rather than data processing for manufacturing parts.

Question 12

Control loop unit of M.C.U is always
A)a hardware unit
B)a software unit
C)a control unit
D)none of the mentioned

Accepted Answer

The control loop unit of a Microcontroller Unit (MCU) is a hardware unit responsible for managing the execution of instructions and controlling the operation of the processor and its peripherals.

Question 13

The repeatability of NC machine depends on
A)control loop errors
B)mechanical errors
C)electrical errors
D)none of the mentioned

Accepted Answer

The answer of The repeatability of NC machine depends on
A)control...

Question 14

Rotation about Z-axis is called………….
A)a-axis
B)b-axis
C)c-axis
D)none of the mentioned

Accepted Answer

Rotation about the Z-axis is commonly referred to as rotation around the c-axis in various contexts, including mathematics and crystallography.

Question 15

Rotation of spindle is designated by one of the following axis:
A)a-axis
B)b-axis
C)c-axis
D)none of the mentioned

Accepted Answer

The answer of Rotation of spindle is designated by one...

Question 16

he linking of computer with a communication system is called………..
A)networking
B)pairing
C)interlocking
D)assembling

Accepted Answer

The linking of a computer with a communication system to share data and resources is referred to as "networking."

Question 17

The process of putting data into a storage location is called
A)reading
B)writing
C)controlling
D)hand shaking

Accepted Answer

The process of putting data into a storage location is known as writing. This involves transferring data from the CPU or memory to a storage device.

Question 18

The process of copying data from a memory location is called
A)reading
B)writing
C)controlling
D)hand shaking

Accepted Answer

Reading is the process of copying data from a memory location into another part of the computer system where it can be used. Writing, on the other hand, involves copying data to a memory location.

Question 19

CNC machining centres do not include operations like
A)milling
B)boring
C)welding
D)tapping

Accepted Answer

Welding is not an operation performed by CNC machining centers.

Question 20

Feed is measured in units of
A)length/revolution
B)degree/revolution
C)length
D)velocity

Accepted Answer

Feed is measured in units of length per revolution, as it represents the distance the tool advances during one complete revolution of the workpiece or tool.

Quiz 4: Computer-Aided Design (CAD)

CAD/CAM is the relationship between

Which two disciplines are tied by a common database?

The term that is used for geometric modelling like solid modelling, wire frame modelling and drafting is known as

The software that is used to control the computer's work flow, organize its data and perform housekeeping functions is known as

During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 the type of tool motion will be

In an NC machining operation, the tool has to be moved from point (5, 4) to point (7, 2) along a circular path with centre at (5, 2) . Before starting the operation, the tool is at (5, 4) . The G and N codes for this motion are

The tool of an NC machine has to move along a circular arc from (5, 5) to (10, 10) while performing an operation. The centre of the arc is at (10, 5) . Which one of the following NC tool path command performs the above mentioned operation?

Match the following: NC code Definition P. M05 1. Absolute coordinate system Q. G01 2. Dwell R. G04 3. Spindle stop S. G09 4. Linear interpolation

In a CNC program block, N02 GO2 G91 X40 Z40……, GO2 and G91 refer to

Numerical control

Computer will perform the data processing functions in

Control loop unit of M.C.U is always

The repeatability of NC machine depends on

Rotation about Z-axis is called………….

Rotation of spindle is designated by one of the following axis:

he linking of computer with a communication system is called………..

The process of putting data into a storage location is called

The process of copying data from a memory location is called

CNC machining centres do not include operations like

Feed is measured in units of