ROBOTICS TECHNICIAN CERTIFICATION EXAM —
PRACTICE TEST (100 QUESTIONS)
1. What is the central controller in most robotic systems?
A. Servo motor
B. Microcontroller
C. Gearbox
D. End effector
Rationale: The microcontroller processes instructions and coordinates
all robotic components.
2. Which sensor is commonly used for obstacle detection in mobile
robots?
A. Temperature sensor
B. Force sensor
C. Capacitive sensor
D. Ultrasonic sensor
Rationale: Ultrasonic sensors measure distance using sound waves
ideal for obstacle detection.
3. A robot’s “degrees of freedom” refers to:
A. How fast it moves
B. The number of independent axes it can move in
C. Its maximum payload
D. Its end-effector type
Rationale: DOF measures independent motions available to the robot.
4. Which motor type provides precise position control without
feedback?
,A. DC motor
B. Induction motor
C. Stepper motor
D. Brushless DC motor
Rationale: Stepper motors move in discrete steps enabling open-loop
precision.
5. A robot’s mechanical “end effector” is:
A. Its CPU
B. Its power supply
C. The tool attached to the robot arm
D. Its programming interface
Rationale: End effectors include grippers, welders, and specialized
tools.
6. What is inverse kinematics used for?
A. Planning electrical circuits
B. Calculating joint angles needed to reach a position
C. Estimating battery capacity
D. Determining torque ratings
Rationale: IK solves joint configurations for a desired end-effector
position.
7. Which programming language is MOST commonly used in ROS
(Robot Operating System)?
A. Java
B. Swift
C. Python
D. Ruby
Rationale: ROS heavily supports Python for scripting and node
communication.
, 8. A robot actuator is responsible for:
A. Reading sensor data
B. Generating program code
C. Producing physical movement
D. Monitoring battery levels
Rationale: Actuators convert electrical energy into motion.
9. Which communication protocol is widely used for industrial
automation?
A. HDMI
B. Modbus
C. USB-C
D. CATV
Rationale: Modbus is a standard industrial communication protocol.
10. Which term describes a robot operating alongside a human?
A. Autonomous robot
B. Service robot
C. Collaborative robot (cobot)
D. Tele-operated robot
Rationale: Cobots are designed for safe human-robot interaction.
11–20
11. The torque of a motor primarily depends on:
A. Voltage only
B. Current and motor design
C. Frequency alone
D. Temperature
Rationale: Torque increases with current and physical design features.
PRACTICE TEST (100 QUESTIONS)
1. What is the central controller in most robotic systems?
A. Servo motor
B. Microcontroller
C. Gearbox
D. End effector
Rationale: The microcontroller processes instructions and coordinates
all robotic components.
2. Which sensor is commonly used for obstacle detection in mobile
robots?
A. Temperature sensor
B. Force sensor
C. Capacitive sensor
D. Ultrasonic sensor
Rationale: Ultrasonic sensors measure distance using sound waves
ideal for obstacle detection.
3. A robot’s “degrees of freedom” refers to:
A. How fast it moves
B. The number of independent axes it can move in
C. Its maximum payload
D. Its end-effector type
Rationale: DOF measures independent motions available to the robot.
4. Which motor type provides precise position control without
feedback?
,A. DC motor
B. Induction motor
C. Stepper motor
D. Brushless DC motor
Rationale: Stepper motors move in discrete steps enabling open-loop
precision.
5. A robot’s mechanical “end effector” is:
A. Its CPU
B. Its power supply
C. The tool attached to the robot arm
D. Its programming interface
Rationale: End effectors include grippers, welders, and specialized
tools.
6. What is inverse kinematics used for?
A. Planning electrical circuits
B. Calculating joint angles needed to reach a position
C. Estimating battery capacity
D. Determining torque ratings
Rationale: IK solves joint configurations for a desired end-effector
position.
7. Which programming language is MOST commonly used in ROS
(Robot Operating System)?
A. Java
B. Swift
C. Python
D. Ruby
Rationale: ROS heavily supports Python for scripting and node
communication.
, 8. A robot actuator is responsible for:
A. Reading sensor data
B. Generating program code
C. Producing physical movement
D. Monitoring battery levels
Rationale: Actuators convert electrical energy into motion.
9. Which communication protocol is widely used for industrial
automation?
A. HDMI
B. Modbus
C. USB-C
D. CATV
Rationale: Modbus is a standard industrial communication protocol.
10. Which term describes a robot operating alongside a human?
A. Autonomous robot
B. Service robot
C. Collaborative robot (cobot)
D. Tele-operated robot
Rationale: Cobots are designed for safe human-robot interaction.
11–20
11. The torque of a motor primarily depends on:
A. Voltage only
B. Current and motor design
C. Frequency alone
D. Temperature
Rationale: Torque increases with current and physical design features.
