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MCQ - TNPSC JTO

JTO - 534 - Advanced Computer Numerical Control

534 - Unit VIII VMC G Code

17)   

What is meant by “over travel” in a CNC or VMC machine?

A.
B.
C.
D.
Answer: B
18)   

Over travel protection in VMC is provided by:

A.
B.
C.
D.
Answer: B
19)   

What happens when a machine hits an over travel limit?

A.
B.
C.
D.
Answer: C
20)   

The emergency stop is classified under which category of safety device?

A.
B.
C.
D.
21)   

When the emergency stop button is pressed, the machine:

A.
B.
C.
D.
22)   

What happens to the CNC program after pressing the emergency stop button?

A.
B.
C.
D.
23)   

Where is the Emergency Stop button typically located on a VMC?

A.
B.
C.
D.
24)   

What is the function of MDI (Manual Data Input) mode in a VMC?

A.
B.
C.
D.
25)   

The AUTO mode is used to:

A.
B.
C.
D.
26)   

In which mode can the operator modify an existing CNC program?

A.
B.
C.
D.
27)   

What does SINGLE BLOCK mode do during CNC program execution?

A.
B.
C.
D.
28)   

What is the function of G17?

A.
B.
C.
D.
29)   

G28 is used to:

A.
B.
C.
D.
30)   

Which G-code is used for tool length compensation (positive Z offset)?

A.
B.
C.
D.
31)   

What does M08 do in a CNC program?

A.
B.
C.
D.
32)   

M05 is used for:

A.
B.
C.
D.