question_answer

16 Match List-I (NC machine tool systems) with List-II (Features) and select the correct answer using the codes given below the lists:

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

Codes:

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