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Multiple Choice QuestionsSubject-CAMSemester-VIIBranch-Mechanical EngineeringUNIT-I Batch model production lines are most suited to which one of the following production situations: a. Job shop b. Mass production, c. Medium production d. All of the above Answer: c Flexible manufacturing systems and ...

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Multiple Choice Questions Subject-CAM Semester-VII Branch-Mechanical Engineering UNIT-I 1. Batch model production lines are most suited to which one of the following production situations: a. Job shop b. Mass production, c. Medium production d. All of the above Answer: c 2. Flexible manufacturing systems and cells are generally applied in which one of the following areas: a. High-variety, low-volume production b. low variety c. low volume d. mass production (e) medium-volume, medium-variety production Answer: a 3. When the flow of materials is variable a. layout by process is most suitable b layout by product is most suitable c. layout by fixed position is most suitable d. line balancing is most suitable Answer: a 5. What type of process would a paper mill be most likely to use? a. Continuous flow b. Project c. Job shop

d. Flow shop Answer: a 6. What are the two basic types of production systems? a. Automated and manual b. Intermittent and non-intermittent process c. Normal and continuous process d. Continuous process and batch Answer: b 7. All of the following are current trends in manufacturing, except: a. global competition b. worker involvement c. total quality management d. linear work flow Answer: b 8. Productivity increases when a. inputs increase while outputs remain the same b. inputs decrease while outputs remain the same c. outputs decrease while inputs remain the same d. inputs and outputs increase proportionately Answer: b 9. Quality in design and production includes: a. service after sale b. performance c. customer expectations d. all of the above Answer: d

10. A closed-loop system is a control system in which the output process variable of interest is compared with the corresponding input process parameter, and any difference between them is used to drive the output value into agreement with the input: a. True b. False. Answer: a 11. CIM stands for a. Computer integrated machine. b. Central integrated machine c. Computer integrated manufacturing d. Central integrated manufacturing Answer: c 12. Which item best describes a CAM technology? a. Numerical control b. Documentation c. Drafting d. Geometric modelling Answer: a 13. CAE and CAM are linked through: a. A common database and communication system b. NC tape programming and automated design c. Assembly automation and tool production d. Parts production and testing Answer: a 14. Automation leads to a. Increase in productivity. b. Shorter lead time c. Unemployment. d. All of the above.

Answer: d 15. Break even analysis consist of a. Fixed cost b. Variable cost c. Fixed and variable cost d. None of the above Answer: c 16. MLT stands for a. Manufacturing lead time b. Mean lead time c. Minimum lead time d. None of the above. Answer: a 17. Process layout is employed for a. Batch production b. Continuous production c. Effective utilization of machines d. All of the above Answer: a 18. for a product layout the material handling equipment a. Have full flexibility b. Employ conveyor belts, trucks etc. c. Be a general purpose type d. Be designed as special purpose for a particular application. Answer: d

19. Product layout is employed for a. Batch production b. Continuous production c. Effective utilization of machines d. All of the above Answer: b 20. CAM refers to a. Computer aided machine b. Computer aided manufacturing c. Central aided manufacturing d. Central aided machine Answer: b

UNIT-II 1. The device, fed to the control unit of NC machine tool which sends the position command signals to sideway transmission elements of the machine, is called as a. controller b. tape c. feedback d. none of the above Answer: b 2. With reference to NC machines, which of the following statements is wrong a. Both closed-loop and open-loop control systems are used b. Paper tapes, floppy tapes and cassettes are used for data storage c. Digitizers may be used as interactive input devices d. Post processor is an item of hardware Answer: c 3. In NC (Numerical Control) machine tool, the position feedback package is connected between a. control unit and programmer

b. programmer and machine tool c. control unit and machine tool d. programmer and process planning Answer: c 4. In CNC machine tool, the part program entered into the computer memory a. can be used only once b. can be used again and again c. can be used again but it has to be modified every time d. cannot say Answer: b 5. Several machine tools can be controlled by a central computer in a. NC (Numerical Control) machine tool b. CNC (Computer Numerical Control) machine tool c. DNC (Direct Numerical Control) machine tool d. CCNC (Central-Computer Numerical Control) machine tool Answer: c 6. Part-programming mistakes can be avoided in a. NC (Numerical Control) machine tool b. CNC (Computer Numerical Control) machine tool c. Both a. and b. d. None of the above Answer: b 7. NC contouring is an example of a. Continuous path positioning b. Point-to-point positioning c. Absolute positioning

d. Incremental positioning Answer: a 8. In a point-to-point type of NC system a. Control of position and velocity of the tool is essential b. Control of only position of the tool is sufficient c. Control of only velocity of the tool is sufficient d. Neither position nor velocity need to be controlled Answer: b 9. The axes of turning machine arc: a. Z and X-axes b. X and Y-axes c. Z and Y-axes d. X, Y and Z-axes Answer: a 10. On turning lathes the machine zero point is generally at the: a. Head stock of lathe spindle nose face b. Dead center of tail stock c. Tool point mounted on tool post d. none of the above Answer: b 11. The heart of a computer is: a. CPU b. ALU c. Monitor d. Keyboard Answer: a 12. MCU stands for a. Machine control unit.

b. Machine center unit c. Mechanical control unit d. Mechanical center unit Answer: a 13. GUI is the acronym for Graphical User Interface. a. True b. False Answer: a 14. The widely employed computer architecture for CAD/CAM applications is: a. Mainframe-based system b. Minicomputer-based system c. Microcomputer-based system d. Workstation-based system Answer: d 15. CNC drilling machine is considered to be a: a. Point-to-point controlled machine b. Straight line controlled machine c. Continuous path controlled machine d. Servo-controlled machine Answer: a 16. The lost motion in CNC machine tool is on account of: a. Backlash in gearing b. Wind-up of drive shafts c. Deflection of machine tool members d. All the above Answer: a

17. The axes of turning machine arc: a. Z and X-axes b. X and Y-axes c. Z and Y-axes d. X, Y and Z-axes Answer: a 18. On turning lathes the machine zero point is generally at the: a. Head stock of lathe spindle nose face b. Dead center of tail stock c. Tool point mounted on tool post d. none of the above Answer: b 19. Which of the following options is correct for the control unit and panel of NC (Numerical Control) and CNC (Computer Numerical Control) machine tools? a. The control unit of NC machine tool works in ON-line mode and the control unit of CNC machine tool works in batch processing mode b. The control unit of NC machine tool works in batch processing mode and the control unit of CNC machine tool works in ON-line mode c. The control units of both NC and CNC machines work in ON-line mode d. The control units of both NC and CNC machines work in batch processing mode Answer: b 20. The machine tool, in which calculation and setting of the operating conditions like depth of cut, feed, and speed are done during the machining by the control system itself, is called a. Computer Numerical Control System b. Direct Numerical Control System c. Machining Centre System d. Adaptive Control System Answer: d...