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MCQ - Mechanical TNPSC JTO
JTO - 534 - Advanced Computer Numerical Control - 534 - Unit VIII VMC G Code

26)   

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

A.
B.
C.
D.
Answer: A
27)   

What does SINGLE BLOCK mode do during CNC program execution?

A.
B.
C.
D.
Answer: B
28)   

What is the function of G17?

A.
B.
C.
D.
Answer: A
29)   

G28 is used to:

A.
B.
C.
D.
Answer: B
30)   

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

A.
B.
C.
D.
Answer: C
31)   

What does M08 do in a CNC program?

A.
B.
C.
D.
Answer: A
32)   

M05 is used for:

A.
B.
C.
D.
Answer: C
33)   

Which parameter must be included with G01 for proper tool movement?

A.
B.
C.
D.
Answer: B
34)   

Which of the following is a valid example of a G00 command?

A.
B.
C.
D.
Answer: A
35)   

In a basic program, which line typically defines the tool movement at a cutting feed rate?

A.
B.
C.
D.
Answer: B
36)   

Which code moves the tool quickly to a target point without cutting?

A.
B.
C.
D.
Answer: C
37)   

A G01 command must include which value to control the movement?

A.
B.
C.
D.
Answer: D
38)   

What is the main difference between G00 and G01?

A.
B.
C.
D.
Answer: B
39)   

In circular interpolation, the center of the arc is specified using:

A.
B.
C.
D.
Answer: B
40)   

Which of the following is a valid G02 command?

A.
B.
C.
D.
Answer: A
41)   

If G54 is used in a program, it means:

A.
B.
C.
D.
Answer: C
42)   

Which parameter compensates for variation in tool height?

A.
B.
C.
D.
Answer: C
43)   

Work offsets are entered and stored in which CNC screen/page?

A.
B.
C.
D.
Answer: C
44)   

What precaution is needed before a dry run?

A.
B.
C.
D.
Answer: C
45)   

The basic formula for machining time (Tc) in turning or milling is:

A.
B.
C.
D.
Answer: B
46)   

If the length of cut is 100 mm, feed is 0.2 mm/rev, and spindle speed is 500 RPM, what is the machining time?

A.
B.
C.
D.
Answer: A
47)   

G15 in CNC programming is used for

A.
B.
C.
D.
Answer: A
48)   

What is the advantage of using polar coordinates in polygonal milling?

A.
B.
C.
D.
Answer: A
49)   

Reduced spindle load

A.
B.
C.
D.
Answer: A
50)   

Mirroring in CNC programming refers to:

A.
B.
C.
D.
Answer: A