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These 10 free C-215 questions are organized by exam domain, so you can see how each part of the Robot System Operations 1 blueprint is tested. Reveal the answer and explanation under each question.
Jam clearing requires access between a pneumatic gripper's jaws. An authorized employee has locked out the electrical disconnect and verified electrical isolation. The gripper still supports a workpiece, and its pressure gauge remains above zero. Before anyone reaches into the jaws, which additional control is required?
Correct answer: C - Secure the load, isolate the air supply, dissipate stored pressure, and verify isolation.
An assembly robot positions parts using two linked horizontal arms that rotate about parallel vertical axes. A vertical slide and a wrist-rotation axis complete the tool motion. What type of robot is the operator using?
Correct answer: D - SCARA
Production is ending normally, with no hazard or fault present. The cell procedure states that CYCLE STOP completes the current cycle, leaves the gripper empty at the parking point, and prevents another cycle; HOLD pauses immediately at the current instruction. A part is currently in transfer, and a validated, authorized point correction is still unsaved. Which shutdown sequence fits this situation?
Correct answer: A - Request CYCLE STOP, confirm the empty parked state, save the correction, then perform controller shutdown.
A cell is specified to use a category 1 emergency stop. During its controlled acceptance test, actuator power remains available while the robot decelerates, then is removed at standstill. Releasing and resetting the emergency-stop device does not restart the robot. Which conclusion belongs in the test record?
Correct answer: B - The observed sequence matches category 1 stopping and prevents restart from reset alone.
A robot has stopped moving, and an operator highlights UNLOAD_B in the program directory. The execution screen still reads ACTIVE PROGRAM: LOAD_A; STATE: WAITING; WAIT CONDITION: FIXTURE_READY=1; ACTUAL FIXTURE_READY: 0; ACTIVE ALARMS: NONE. What does this display establish?
Correct answer: D - LOAD_A remains active and is waiting for the fixture-ready input.
A maintenance record requires the current TCP position in World coordinates. The pendant shows User coordinates (40, 15, 20) mm. The User origin is at World (500, 100, 50) mm; User +X points along World +Y, User +Y along World -X, and User +Z along World +Z. The robot remains stationary. Which World position should be recorded?
Correct answer: B - (485, 140, 70) mm
A frame-teaching wizard requests an origin O, a point defining +X, and a third point on the positive-Y side of the intended XY plane. Using the verified TCP, the operator records World positions O=(0,0,0), X=(160,0,0), and P=(160,120,0) mm. A colleague insists that P must lie on the Y axis through O. How should these data be assessed?
Correct answer: C - The points define the intended axes; P establishes the plane without lying on the Y axis.
An unloaded gripper is undergoing an authorized I/O test with the robot stationary. Its OPEN and CLOSED inputs indicate only the two ends of jaw travel. The test requires CLOSED to become 1 within 1.0 second of a close command. After 0.3 seconds, both inputs are 0, the jaws are visibly closing, and there is no obstruction. How should the operator interpret this snapshot?
Correct answer: A - Travel is still in progress; monitor for closed confirmation within the allowed time.
A dispensing nozzle has been replaced with a longer one. The mounting is secure. During a low-speed check, the operator jogs the new tip to a fixed reference mark, then commands orientation changes about the selected tool center point (TCP). The physical tip sweeps away from the mark even though the displayed TCP position remains constant. Before touching up the taught points, what should be checked?
Correct answer: C - Whether the active TCP definition matches the replacement nozzle
Two pneumatic grippers supplied by the same air manifold fail to reach their closed positions during separate tests. Both close-command outputs are ON, and both closed-position inputs remain OFF. The manifold gauge reads 330 kPa; the equipment requires 400-600 kPa. No electrical or robot-motion fault is reported. Where should the fault investigation begin?
Correct answer: D - The shared pneumatic supply and its out-of-range pressure
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