2007 project lead the way computer integrated manufacturing fall final part a

Project Lead The Way, Inc. Copyright 2007

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Computer Integrated Manufacturing™

Final Examination

Part A

Fall 2007

Student Name: ___________________________________ Date: _____________________ Class Period: _____________

Total Points: ____________/40 Converted Score: ________________/50


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Part A - Multiple Choice

Directions: This is a CLOSED-BOOK/CLOSED-NOTES exam. Select the letter of the response that best completes the item or answers the question. Then transfer your answer to the Part A Recording Sheet.

1- Computer Modeling

1. In drawing #1, lines AB and CD are parallel and crossed by line EF. Which combination of angles represented in drawing #1 will add up to 180 degrees? Drawing #1

A. Angles AGE and CHG C. Angles EGB and GHD B. Angles FHD and EGB D. Angles CHF and EGB

2. When a dimension is expressed as .250

001.002.

the (+/–) portion of the

dimension is known as the _________________.

A. range. C. extents. B. tolerance. D. error band.

3. Study the image on the right.

Starting at point A, what relative coordinate would result in a line segment to point C?

A. (4, -1) C. (-1,4) B. (1,-4) D. (4,1)


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4. Which drawing command would be the most efficient means to place a regularly spaced pattern of 5 holes around a center point?

A. Snap to grid C. Copy B. Circular pattern D. Mirror

5 What is the reading indicated by the

settings on the Dial Caliper?

A. .501” C. 1.550” B. 1.500” D. 1.650” 6 What is the name of the rapid prototyping process that deposits molten

plastic in a desired pattern and then allows it to harden by cooling?

A. Stereolithography C. Sintering B. Laminated object

manufacturing D. Fused deposition modeling

7 Which of the following rapid prototyping processes uses powdered plastics,

ceramics or metals as the raw material to make a model? A. Fused Deposition Modeling C. Stereo Lithography B. Selective Laser Sintering D. Laminated Object Manufacturing

8 Most rapid prototyping processes are ________________ processes.

A. additive C. subtractive B. milling D. cutting


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9 The plate pictured above was

designed in a solid-modeling CAD package. Given the spreadsheet at right, it can be assumed that the size of the plate, its features, and their locations within the plate were called-off using _____________ dimensions.

A. Aligned C. Associative B. Annotated D. Parametric

10 In the drawing above, if dimension d0 is 3 inches, then what would be the

actual size of the smallest hole on the plate (d13)?

A. 0.0625 C. 0.125 B. 0.3125 D. .25


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2 – Computer Numerical Control

11. Which of the following components used in CNC machine tools are most responsible for the accuracy of linear movement and elimination of backlash?

A. Limit switches C. Ball Screws B. Microcontrollers D. Acme Lead Screws

12. Given the formula

D4 x CS N , what is the correct spindle rotation speed

(RPM) for ¼ inch diameter end mill if the material cutting speed is 250 fpm? A. 8000 RPM C. 2000 RPM B. 1000 PRM D. 4000 RPM

13. Which of the following is the reference point used to locate tooling at the start of a milling cycle?

A. XYZ C. PRZ B. IJK D. CIM

14. If the tool height offsets are the same for each tool, what will happen to a pocket being milled in stock if a ¼” end mill is specified in the CNC code and a ½” end mill is used in the milling machine?

A. The pocket will mill to the correct size.

C. Nothing. CNC mills can’t do pocketing operations.

B. The pocket will be smaller than desired.

D. The pocket will be larger than desired.


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15. Which sequence of operations is most correct for the design and creation of CNC parts?

A. CAD Geometry, Concept sketch, Program Verification, G&M Code Post, CAM analysis, CNC Program Execution

C. CAM analysis, G&M Code Post, Concept Sketch, CAD Geometry, Program Verification, CNC Program Execution

B. Concept sketch, CAD Geometry, CAM analysis, G&M Code Post, Program Verification, CNC Program Execution

D. CNC Program Execution, Program Verification, G&M Code Post, CAM analysis, CAD Geometry, Concept Sketch

16. Which of the following codes is a preparatory code?

A. H12 C. M11 B. G02 D. F10

17. Which of the following codes is most appropriately used with an M06 in the

same line or block of code?

A. H10 C. M03 B. F10 D. T10

18. Given the formula Fm=ft nt N, what is the feed in IPM of a ¼” diameter

4-tooth end mill rotating at 2000 rpm with a feed rate of .005 IPT? A. 4 IPM C. 25 IPM B. 400 IPM D. 40 IPM


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19. What is the measurement indicated by this 1” micrometer to the nearest thousandth of an inch?

A. .151” C. .601” B. .149” D. .211”

20. What two programming elements can the letter F represent in a line of CNC

code?

A. Feed rate and offsets C. The Z coordinate of an arc and the retract height in a drilling cycle

B. Feed rate and time D. Offsets and spindle speed

3 – Robotics

21. The amount of weight that a robot can safely and accurately lift at the end of the arm (where the end effector mounts) is known as its _________________.

A. payload. C. load limit. B. dead weight. D. safety load.


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22. What type of robot is pictured in drawing below ?

A. Cartesian C. Cylindrical B. SCARA D. Spherical

23. What is the term used to express a robot's mechanical ability to place its end effector at a programmed point?

A. Repeatability C. Accuracy B. Point placement D. Functionality

24. The image below shows the test results of 4 different industrial robots that

were used to place an object at an exact location on a pallet (the center of each target). Which two robots have the highest repeatability?

A. W and X C. W and Z B. Y and Z D. Y and X


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25. Which of the following control techniques provides the greatest amount of positional accuracy?

A. Closed loop with pneumatic power

C. Closed loop with electric power

B. Open loop with hydraulic power

D. Open loop with pneumatic power

26. Which type of robot programming moves a robot from position to position without regard for the intermediate points in between?

A. Continuous path C. Off-line B. Point to Point D. Homing

27. A robot that is used to weld a long, curved seam would most likely use which of the following programming techniques?

A. Point to point C. Off-line B. Continuous path D. Pick and place

28. What is the purpose of an encoder in a robot or CNC mill? A. To provide feedback to the

controller about position. C. To send pulses of electricity to

the stepper motors so that they move.

B. To create a programming code that the robot or mill will follow.

D. To shut off the robot or mill if a limit is reached.

29. Study the image at right. How many degrees of freedom does the robot have?

A. 4 C. 6 B. 5 D. 7

Project Lead The Way, Inc. Copyright 2007 of 12

30. When selecting a device to provide input to a PLC, which digital sensor can be used when the object to be detected will not be in physical contact with the sensor?

A. Momentary contact switch C. Photo Resistor B. Photo transistor D. Stepper motor

4 – Computer Integrated Manufacturing

31.

What is the name of the system that is used for scheduling production supplies?

A. Flexible Manufacturing Systems (FMS)

C. Automated Storage and Retrieval System (ASRS)

B. 6 Sigma D. Manufacturing Resource Planning (MRP)

32. Which of the following factors is a reason for implementing a CIM system in

a manufacturing plant?

A. Everybody is doing it. C. CIM is inexpensive to implement and it helps to keep labor costs down.

B. CIM is difficult to implement even though it is inexpensive.

D. CIM keeps the business more competitive by making it quicker and easier to change over production lines

33. Which device is used to monitor simple devices such as limit switches and turn on devices such as relays and indicators?

A. PLC C. CNC mill B. Encoder D. Magnetron

34.

What is the term that describes a set of manufacturing machines that can be easily reconfigured to produce other similar products?

A. Manufacturing Resource Planning (MRP)

C. Computer Integrated Manufacturing (CIM)

B. Flexible Manufacturing Systems (FMS)

D. Automated Storage and Retrieval System (ASRS)


35. A CIM system is used to integrate all of the ___________________ of a manufacturing enterprise.

A. automated and manual machines.

C. manufacturing and business processes

B. accounting and shipping D. material handling and shipping 36 A CNC milling machine is stopped and is waiting for a robot to load a part

and move out of the way. How does the milling machine know when it is safe to mill?

A. Through the use of hand shaking communication between machine controllers.

C. By waiting until all operations have stopped before moving.

B. The person operating the mill stops the machine and watches the robot to make sure it is safe to go.

D. By milling quickly so the robot is never in the way.

37 Which of the following statements is true regarding an FMS? A. Individual machine problems

will shut down the whole system

C. Emergency stop switches are not required

B. Multiple types of parts can be manufactured at the same time.

D. All must follow an identical process flow.

38 The rotary position-sensing device shown at right

represents _________________ encoder wheel.

A. an absolute optical C. an incremental optical B. a magnetic tachometer D. a digital-Archemedian


39 A manufacturer uses only one type of CAM software, but has many different types and brands of CNC machines. How is the programming customized to meet the specifications of each machine?

A. A postprocessor is used in conjunction with the CAM software.

C. Code is added by hand for each of the different machines.

B. Not possible, because each machine must use a different CAM software.

D. A program called a machine customizer is used to edit the code.

40 The ability of a machine to make decisions about the characteristics of a

part through the use of sensors and software programming is using which of the following capabilities?

A. Integration C. Artificial Intelligence B. Optical Character Recognition D. Open Loop

2007 project lead the way computer integrated manufacturing fall final part a

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