FANUC CERTIFICATION FINAL EXAM 230 Practice Questions with answers and rationales ________________________________________

FANUC CERTIFICATION FINAL EXAM
230 Practice Questions with answers and
rationales

SECTION 1: FANUC ROBOT FUNDAMENTALS

1. What does the acronym "FANUC" stand for?

 A) Fully Automated Numerical Universal Computer
 B) Fuji Automatic NUmerical Control (correct answer)
 C) Federal Automated Numerical Unit Controller
 D) Factory Automated Numerical Universal Control

Rationale: FANUC stands for Fuji Automatic NUmerical Control, originating from the
company's founding in Japan as a division of Fujitsu focused on numerical control systems.



2. What is the primary function of a FANUC robot controller?

 A) To power the robot's motors only
 B) To process program instructions and coordinate all robot motion and I/O (correct
answer)
 C) To store only teach pendant programs
 D) To communicate with external PLCs exclusively

Rationale: The robot controller is the "brain" of the system — it executes programs, manages
axis motion, processes I/O signals, communicates with external devices, and monitors system
status.



3. FANUC robots use which type of coordinate system as their most fundamental reference?

,  A) Tool frame
 B) User frame
 C) World coordinate system (correct answer)
 D) Joint coordinate system

Rationale: The world coordinate system is the fixed, global reference frame of the robot cell. All
other coordinate systems (tool frame, user frame) are defined relative to the world frame.



4. The FANUC teach pendant (iPendant) emergency stop button:

 A) Only pauses the current program
 B) Immediately removes servo power and stops all robot motion (correct answer)
 C) Triggers a fault that must be cleared before stopping
 D) Only works when the teach pendant is enabled

Rationale: The E-stop on the teach pendant immediately cuts servo power to all robot axes,
stopping motion instantly. It is a safety-critical function that works regardless of program state.



5. What is the function of the "DEADMAN" switch on the FANUC teach pendant?

 A) It activates the robot's automatic mode
 B) It must be held in the middle position to enable robot motion in T1 or T2 mode
(correct answer)
 C) It shuts down the controller when released in auto mode
 D) It enables high-speed motion in teach mode

Rationale: The deadman (enabling device) switch must be held in the intermediate (squeezed)
position for servo power in T1/T2 modes. Releasing OR fully squeezing removes servo power —
a key safety feature.



6. In FANUC systems, "T1" mode limits robot speed to:

 A) 100% of maximum speed
 B) 50% of maximum speed
 C) 250 mm/s maximum TCP speed (correct answer)
 D) 10% of joint speed

Rationale: T1 (Teach mode 1) limits the robot TCP (Tool Center Point) to a maximum of 250
mm/s for safe manual jogging and program verification close to the robot.

,7. "T2" mode on a FANUC robot allows:

 A) Only slow-speed jogging with the teach pendant
 B) Program execution at full programmed speed with the teach pendant enabled (correct
answer)
 C) Fully automatic operation without the teach pendant
 D) Remote operation through an external PLC

Rationale: T2 (Teach mode 2) allows the robot to run at full programmed speed but requires the
teach pendant deadman switch to be held. It is used for high-speed program verification before
switching to Auto mode.



8. "AUTO" mode on a FANUC robot:

 A) Requires the teach pendant deadman to be held
 B) Limits speed to 250 mm/s
 C) Allows fully automatic program execution from an external start signal without the
teach pendant (correct answer)
 D) Allows only single-step program execution

Rationale: AUTO (or Remote) mode enables production operation — programs run at full speed
initiated by an external start signal (PLC, operator panel), and the teach pendant is not required
(and typically should be disconnected or disabled).



9. Which FANUC controller series is most commonly found on modern industrial robots?

 A) RJ2
 B) RJ3iB
 C) R-30iB and R-30iB Plus (correct answer)
 D) A-04B

Rationale: The R-30iB and R-30iB Plus are FANUC's current-generation robot controllers,
featuring advanced motion control, integrated vision, and iRVision capabilities.



10. The FANUC robot's "zero position" or "home position" refers to:

 A) The position where all axis values read 0 degrees (correct answer)
 B) The robot's calibrated mastering position

,  C) The position the robot moves to when powered on
 D) A user-defined safe retract position

Rationale: The zero position (all joint angles = 0°) is typically the mechanical reference posture
of the robot, though specific robot models may define it differently. It is distinct from a user-
defined home position.



SECTION 2: ROBOT SAFETY

11. According to FANUC safety standards, who is authorized to enter the robot work envelope
during automatic operation?

 A) Any trained operator
 B) The robot programmer only
 C) No one — entry into the work envelope during automatic operation is prohibited
(correct answer)
 D) Maintenance personnel with a buddy system

Rationale: No personnel should enter the robot work envelope during automatic operation. The
robot must be stopped, servo power removed, and energy locked out before any person enters the
work envelope.



12. "Lockout/Tagout" (LOTO) procedures are required before:

 A) Starting a production run
 B) Performing any maintenance, repair, or adjustment on the robot system (correct
answer)
 C) Running a new program for the first time
 D) Changing the robot's operating mode

Rationale: LOTO ensures that all energy sources (electrical, pneumatic, hydraulic) are isolated
and secured before maintenance personnel work on the robot system, preventing unexpected
energization or motion.



13. The minimum safety requirement for a FANUC robot cell is:

 A) A yellow warning line painted on the floor
 B) Safety fencing or guarding that prevents personnel from entering the work envelope
during automatic operation (correct answer)
 C) A warning light visible from 10 meters