NIMS CNC MILL OPERATOR TEST 2026/2027 – VERIFIED Q&A + A+ GRADED ANSWERS STUDY GUIDE

NIMS CNC MILL OPERATOR TEST
2026/2027 – VERIFIED Q&A + A+
GRADED ANSWERS STUDY GUIDE

NIMS CNC MILL OPERATOR TEST 2026/2027

VERIFIED Q&A + A+ GRADED ANSWERS STUDY GUIDE



• This study guide features verified questions and graded answers with
EXPERT RATIONALE explanations — use it by reading each question, selecting
your answer mentally, then checking the highlighted correct answer and
EXPERT RATIONALE to reinforce your understanding.

• Each question is exam-formatted with five options, bold correct answers,
and clear EXPERT RATIONALE — ideal for active recall, timed practice, and full
topic coverage preparation.




Q1. What does CNC stand for in CNC machining?

A. Computer Numerical Control

B. Centralized Numerical Computing

C. Controlled Numerical Cutting

D. Computer Network Control

E. Centralized Network Computing

Correct Answer: A. Computer Numerical Control

EXPERT RATIONALE: CNC stands for Computer Numerical Control, referring to
the automated control of machining tools by means of a computer executing pre-
programmed sequences of commands.

,Q2. Which axis on a CNC mill moves the table LEFT and RIGHT?

A. Z-axis

B. Y-axis

C. A-axis

D. B-axis

E. X-axis

Correct Answer: E. X-axis

EXPERT RATIONALE: On a standard CNC vertical milling machine, the X-axis
controls left and right movement of the table. The Y-axis controls front and back,
and the Z-axis controls up and down spindle movement.



Q3. What is the primary function of a G00 code in CNC programming?

A. Feed rate movement

B. Circular interpolation

C. Tool change command

D. Spindle start

E. Rapid positioning

Correct Answer: E. Rapid positioning

EXPERT RATIONALE: G00 is the rapid traverse command that moves the tool to
a specified position at the machine's maximum speed, without cutting. It is used for
non-cutting moves to save time.



Q4. Which G-code is used for linear interpolation (straight-line cutting) at a
programmed feed rate?

A. G00

,B. G01

C. G02

D. G03

E. G04

Correct Answer: B. G01

EXPERT RATIONALE: G01 commands the machine to move in a straight line at
the programmed feed rate, making it the standard code for linear cutting moves in
CNC milling.



Q5. What does G02 command in CNC milling?

A. Rapid positioning

B. Linear interpolation

C. Clockwise circular interpolation

D. Counterclockwise circular interpolation

E. Dwell

Correct Answer: C. Clockwise circular interpolation

EXPERT RATIONALE: G02 commands the tool to move in a clockwise arc at the
programmed feed rate. It requires center point coordinates (I and J) or a radius (R)
value to define the arc.



Q6. Which G-code commands counterclockwise circular interpolation?

A. G00

B. G01

C. G02

D. G03

, E. G04

Correct Answer: D. G03

EXPERT RATIONALE: G03 commands counterclockwise circular arc movement
at the programmed feed rate. Like G02, it uses I/J or R values to define the arc
geometry.



Q7. What is the function of G04 in CNC programming?

A. Tool change

B. Circular interpolation

C. Dwell (pause)

D. Feed rate override

E. Spindle stop

Correct Answer: C. Dwell (pause)

EXPERT RATIONALE: G04 causes the machine to pause (dwell) for a specified
amount of time. It is commonly used to allow the spindle to reach full speed or to
ensure chip clearance at the bottom of a bore.



Q8. Which G-code cancels cutter radius compensation?

A. G41

B. G42

C. G40

D. G43

E. G44

Correct Answer: C. G40