Question

What is the correct order of the development of the following? A. Computer Numerical Control
B. Numerical Control
C. Distributed Numerical Control
D. Direct Numerical Control

• A. B, A, D, C
• B. A, B, C, D
• C. D, B, A, C
• D. C, D, B, A

Hint:

NC → CNC → DNC → Distributed systems (increasing automation level).

Answer 1

The Correct Option is A

Concept: Development of control systems in manufacturing progressed with advancement in computing technology.

Step 1: Numerical Control (NC).

• Earliest system
• Uses punched tapes
• No computer involved

Step 2: Computer Numerical Control (CNC).

• Computer replaces tape reader
• More flexible and programmable

Step 3: Direct Numerical Control (DNC).

• Central computer controls multiple machines directly

Step 4: Distributed Numerical Control.

• Multiple computers connected in network
• Advanced control architecture

Step 5: Arrange chronologically.
\[ NC \rightarrow CNC \rightarrow DNC \rightarrow Distributed NC \] \[ B \rightarrow A \rightarrow D \rightarrow C \] Final Answer: \[ \boxed{B, A, D, C} \]