2009 project lead the way computer integrated manufacturing spring final part a

Computer Integrated Manufacturing

Final Examination

Part A

Spring 2009PRACTICE EXAM

Student Name: ___________________________________

Date: _____________________

Class Period: _____________Total Points: ____________/40

Converted Score: ________________/50

Project Lead The Way®

Copyright 2006 - of 10

Part A - Multiple Choice

Directions: This is a CLOSED-BOOK/CLOSED-NOTES exam. Select the letter of the response which best completes the item or answers the question.

1. 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

2. 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

3. In drawing #2 of a right triangle, what information will be needed to calculate the angle at C if the Tangent function is used and the length of AC is known?

Drawing #2

A. Angle at B C. Length of side AB

B. Length of side BC D. No other information is needed.



4. What is the main advantage of rapid prototyping?

A. Rapid prototyping allows models to be quickly and accurately made from a CAD or solid model drawing.

C. Only models made from a rapid prototyping process are useful to manufacturers.

B. Rapid prototyping uses expensive machines not available to all manufacturers.

D. Rapid prototyping models are less detailed than handmade models so they are less expensive.

5. Which of the following rapid prototyping processes uses a liquid polymer in the process of creating a prototype?

A. Selective laser sintering C. Laminate object manufacturing

B. Stereolithography D. 3D printing

6. Most rapid prototyping processes are ________________ processes.

A. additive C. subtractive

B. milling D. cutting

7. 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

8. When two line segments of a sketch fall on the same line, they are said to be ______________________.

A. collinear. C. parallel.

B. concentric. D. collated.



9. The length measured on this caliper is ___________________.

A. .8205” C. 8.250”

B. 82.50” D. .825”

10. Which of the following measurements is the most precise?

A. .01 inches C. .0110 inches

B. .010 inches D. .01100 inches

11. If the tool height offsets are the same for each tool, what will happen to a pocket being milled in a block of material if a ¼” end mill is called out in the CAM software and a ½” diameter end mill is used to machine the pocket?

A. The pocket will mill to the correct size.

C. The pocket will be larger than desired.

B. The pocket will be smaller than desired.

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

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

A. H12 C. M11

B. F10 D. G02



13. 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. T10 D. F10

14. If two end mills are identical in every way except that end mill A has two teeth and end mill B has four, which of the following statements is true about the end mills?

A. End mill B will have a higher calculated feed rate than end mill A.

C. End mill A will have a higher calculated spindle speed than end mill B.

B. End mill A will have a higher calculated feed rate than end mill B.

D. End mill A will only do climb milling.

15. When “homing” a robot or a CNC machine, which feedback device is used to indicate the machine has reached the extent of its travel on an axis?

A. Solid state relay C. Incremental encoder

B. Limit switch D. Piezo transducer

16. Which of the four cutters shown below is most appropriately used to accurately machine a surface with complex curves?



17. Which sequence of operations is most correct for the design and creation of precision parts?

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

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

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

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

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. 40 IPM C. 25 IPM

B. 400 IPM D. 4 IPM

19. Which of the following devices uses signals from a CNC controller to precisely control its rate of rotation and direction of rotation?

A. Encoder C. Linear bearing

B. Tactile sensor D. Stepper motor

20. Which of the following is an advantage of using CAM software over manually creating the G&M code to machine a part?

A. CAM software is inexpensive. C. Cam software will always create a much more efficient tool path than a person can.

B. CAM software does the calculations for creating the tool paths much quicker than a person can do it.

D. CAM software is more likely to find errors in your part design.

21. The first industrial robots were used primarily to improve the quality of the products in which industry?

A. Shipping C. Aerospace

B. Automotive D. Agriculture

22. The first industrial robot was developed in the early 1960’s, and was called _________________.A. IBM. C. Unimate.

B. PUMA. D. SCARA.



23. What type of robot is pictured in drawing # 4?

Drawing #4

A. Cartesian C. Cylindrical

B. SCARA D. Spherical

24. What type of robot is pictured in drawing # 5?

Drawing #5

A. Spherical C. Cylindrical

B. SCARA D. Cartesian

25. In drawing #5 from the previous question, how many degrees of freedom will this robot have if the end effector has pitch, yaw and roll in addition to the movements indicated in the drawing.

A. 4 C. 6

B. 5 D. 3



26. The maximum extent or reach of a robot in all directions is defined as its ______________.

A. work envelope. C. work cell.

B. work area. D. work environment.

27. A robot’s ability to position its end effector at a specific point in space is defined as _____________.

A. payload. C. accuracy.

B. repeatability. D. tolerance.

28. Drawing #6 is an example of ___________________________.

Drawing #6

A. a magnetic tachometer. C. an incremental encoder.

B. a magnetic encoder. D. an absolute optical encoder.



29. The image below shows the result of four different robots used to place a computer chip into a socket. What can be said about the robot that produced result X?

A. The Robot has low accuracy and low repeatability.

C. The robot has high accuracy and low repeatability.

B. The robot has low accuracy and high repeatability.

D. The robot has high accuracy and high repeatability.

30. 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

31. 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

32. What is an advantage of having more degrees of freedom in a robot arm?

A. The work envelope is larger. C. The end effector uses NC code.

B. The robot controller is less complex.

D. The end effector has more ways to reach a point.

33. A prototype is ____________________.

A. an item which is modeled or based on an original design.

C. a method of manufacturing with conventional machines.

B. a mass produced product. D. a process which is never used in computer integrated manufacturing.



34. The acronym FMS stands for ________________.

A. factory mill specifications. C. frequency manufacturing standard.

B. flexible manufacturing system. D. flexible metal system.

35. Which of the following is the best description of a family of parts?

A. Parts which are made out of the same material.

C. Parts which are similar in the way they can be manufactured.

B. Parts that are put together in an assembly.

D. A part that is used in a variety of products.

36. Which device would most likely be used to control the inputs and outputs in a work cell containing a machining center, robot and a conveyor?

A. Programmable logic controller C. Optical encoder

B. End of arm tooling D. Ball screw

37. What is the term that describes how a robot and CNC mill communicate?

A. ASRS C. Handshaking

B. CIM D. Feedback

38. Which of the following concepts addresses how a part moves through an entire CIM system?

A. Process flow C. ASRS

B. CNC D. Robot programming

39. What device is an automated system for storing and retrieving components and inventory?

A. MRP C. ASRS

B. CAM D. FMS

40. The time to complete the handling and machining of a part from start to finish is known as ______________.

A. duty cycle. C. machining time.

B. part replacement. D. cycle time.



2009 project lead the way computer integrated manufacturing spring final part a

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