Practice Exam Questions And Correct

SME Certified Robotics Technician (CRT) Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which of the following best defines a robot according to ISO 8373?
• A mechanical device that moves on tracks
• A computer-controlled machine with no human interaction
• An automatically controlled, reprogrammable, multipurpose

manipulator

• A tool used for assembling parts manually

Rationale: ISO 8373 defines a robot as a reprogrammable,

multipurpose manipulator designed to move materials or devices through variable programmed motions.

• What is the main function of a robot’s end effector?
• To power the robot’s motors
• To sense environmental conditions 1 / 4

• To interact with the environment or perform a specific task
• To process program logic

Rationale: The end effector is the “hand” of the robot, designed to

manipulate objects or perform a task such as gripping or welding.

• Which type of drive system uses compressed air to move actuators?
• Hydraulic
• Pneumatic
• Electric
• Magnetic

Rationale: Pneumatic systems utilize compressed air to drive actuators

and provide quick, clean movement.

• What does the term “degrees of freedom” refer to in robotics?
• Power level of the motors
• Size of the workspace
• Number of independent movements a robot can perform
• Control system type

Rationale: Degrees of freedom represent the number of independent

axes or motions available to the robot.

• Which coordinate system is typically used for programming Cartesian

robots?

• Rectangular coordinate system
• Cylindrical coordinate system
• Polar coordinate system 2 / 4

• Spherical coordinate system

Rationale: Cartesian robots move linearly along X, Y, and Z axes,

matching the rectangular coordinate system.

• What is the purpose of a teach pendant?
• To provide vision for the robot
• To manually program and control the robot’s movements
• To regulate motor speed
• To calibrate sensors

Rationale: A teach pendant is a handheld control unit used to

manually teach and record robot positions.

• In a six-axis articulated robot, which joint provides rotational motion

of the wrist?

• Base rotation
• Shoulder pitch
• Elbow roll
• Wrist rotation

Rationale: The wrist rotation joint allows the robot to orient the end

effector around its longitudinal axis.

• What is the typical power source for industrial robots?
• Pneumatic
• Electric
• Hydraulic
• Solar 3 / 4

Rationale: Most modern industrial robots use electric servo motors for

precise, efficient motion control.

• What is backlash in robotic joints?
• Power surge
• Unwanted movement due to mechanical play between gears
• Excessive torque
• Sensor lag

Rationale: Backlash occurs when there is mechanical looseness

between components, leading to imprecise motion.

• Which robot configuration provides a large spherical work

envelope?

• Cartesian
• Cylindrical
• Spherical (polar)

D. SCARA

Rationale: Spherical robots use rotary and linear joints, creating a

spherical working area.

• Which control system updates continuously based on sensor

feedback?

• Open-loop control
• Closed-loop control
• Manual control
• / 4