List-I | List-II | ||
A. | NC system | 1. | It has an integrated automatic tool changing unit and a component indexing device |
B. | CNC system | 2. | A number of machine tools arc controlled by a computer. No tape reader, the part programme is transmitted directly to the machine tool from the computer memory |
C. | DNC system | 3. | The controller consists of soft-wired computer and hard-wired logic system. Graphic display of tool path is also possible |
D. | Machining centre | 4. | The instruction on tape is prepared inbinary decimal form and operated by a series, of coded instructions |
A) A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]1
B) A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]4
C) A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1
D) A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4
Correct Answer: A
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