1-48. What  CAD  component(s)  produce(s) the drawing after it has been completed  on  the  computer  screen? 1. 2. The plotter only 3. The digitizer only 4. The  plotter  and  digitizer The printer and digitizer 1-49. What is the main advantage of using numerical  control  machines  rather than  manually  operated  machines? 1. They can be used in mass production 2. 3. They  cost  less  to  operate 4. They allow faster production They can be operated by untrained   machinists 1-50. Which of the following best describes  direct  numerical  control (DNC)? 1. It allows the draftsman to program  the  computer  to  operate various machines used to 2. produce  the  final  print It  provides  instructions  that can be stored in a central computer memory, or on disk, for direct transfer to one or more  machines  that  will  make the part 3. It provides more rapid and 4. precise  manufacturing  of  parts It acts as a central file where all  drawings  may  be  stored without  having  to  store  a  large number  of  prints 1-51. What types of training are required to  operate  CAD  and  computer-aided manufacturing  (CAM)  systems? 1. Specialized  and  formal 2. Correspondence  courses  provided by  the  manufacturer  of  the system 3. 4. Formal and on-the-job (OJT) OJT  and  correspondence  courses 5 1-52. Which  of  the  following  best describes the CAD/CAM systems used in 1. manufacturing? CAD draws the part and defines the tool path; CAM converts the tool  path  into  codes  the machine's computer understands CAD controls the machine used to make the part; CAM is the drawing  medium  used  to  convert instructions  to  the  machine making  the  part CAD is the process in which all instructions  are  sent  to  the DNC  operating  stations;  CAM  is the  receiving  station  that converts  instructions  from  the CAD to the machine used to make the part CAD uses the input from the engineer to relay design changes to the print; CAM receives those changes and converts them to codes used by the machine that makes the part 2. 3. 4. 1-53. The view of an object is technically  known  by  what  term? 1. Projection 2. Extensions 3. Extenders 4. Parallelism 1-54. To visualize the object to be made from  a  blueprint,  you  should  take what  step  first? 1. 2. Look at the front view only Interpret  each  line  on  the adjacent  view 3. Study  all  views 4. Look at the top and side views only 1-55. Why are central projections seldom used? 1. They vary with the distance between the observer and the plane of projection 2. They vary with the distance between the observer and the object 3. They vary in size according to the  relative  positions  of  the object and the plane of projection 4. All of the above 1-56. Oblique  and  axonometric  projections show which of the following dimensions? 1. 2. Height and width only Length only 3. Width only 4. Height, width,  and  length