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MCQ - Mechanical TNPSC JTO
JTO - 534 - Advanced Computer Numerical Control - 534 - Unit IV Introduction CNC Machines

26)   

MPG mode is activated during:

A.
B.
C.
D.
Answer: C
27)   

In MPG mode, which component is used to control movement?

A.
B.
C.
D.
Answer: C
28)   

Which mode is best for checking or modifying a G-code program?

A.
B.
C.
D.
Answer: C
29)   

Which mode should be used for a full production run?

A.
B.
C.
D.
Answer: C
30)   

In the command G00 X50 Y30, what will the machine do?

A.
B.
C.
D.
Answer: C
31)   

Which mode must be active for G00 or G01 to execute correctly?

A.
B.
C.
D.
Answer: C
32)   

Linear interpolation can happen in:

A.
B.
C.
D.
Answer: B
33)   

G01 X20 Y10 Z–5 means:

A.
B.
C.
D.
Answer: B
34)   

The format G02 X30 Y40 I15 J10 means:

A.
B.
C.
D.
Answer: C
35)   

What will the command G03 X10 Y20 I5 J5 do?

A.
B.
C.
D.
Answer: B
36)   

In a parting operation, the final movement of the tool is:

A.
B.
C.
D.
Answer: C
37)   

Which tool material is commonly used for parting operations in CNC?

A.
B.
C.
D.
Answer: B
38)   

In multi-start threads, lead is calculated as:

A.
B.
C.
D.
Answer: C
39)   

What does a double-start thread mean?

A.
B.
C.
D.
Answer: D
40)   

Which thread type is used commonly in bottle caps or camera lenses for quick movement?

A.
B.
C.
D.
Answer: C
41)   

Which of the following requires precise synchronization between spindle and tool feed in CNC threading?

A.
B.
C.
D.
Answer: D
42)   

A taper thread is mainly used for:

A.
B.
C.
D.
Answer: C
43)   

In the tool offset table, the length offset is generally stored under:

A.
B.
C.
D.
Answer: C
44)   

In taper threading on a CNC lathe, constant taper angle is achieved by

A.
B.
C.
D.
Answer: C
45)   

If a single-start thread has 2 mm pitch and a double-start has 2 mm pitch, their lead difference is:

A.
B.
C.
D.
Answer: D
46)   

In the G71 cycle, what is the purpose of the P and Q parameters?

A.
B.
C.
D.
Answer: B
47)   

Which cycle removes material in a pecking fashion along the Z-axis during grooving?

A.
B.
C.
D.
Answer: C
48)   

The G74 cycle is used to perform grooving by repeated cutting movements along the:

A.
B.
C.
D.
Answer: B
49)   

Why is tool nose radius compensation critical in finish turning?

A.
B.
C.
D.
Answer: C
50)   

The compensation amount for G41/G42 is based on:

A.
B.
C.
D.
Answer: C