WorksheetsSummative Test: Final Elements and Indicating Devices (FEI)
Total questions: 50
Worksheet time: 25mins
Choose the best answer for each item. What is the primary function of an actuator in a robotic system?
Display information to the user
Convert control signals into physical movement
Detect environmental changes
Store electrical energy
Choose the best answer for each item. Which type of actuator is best suited for lifting heavy loads, such as car parts in a factory?
Servo motor
Stepper motor
Hydraulic actuator
DC motor
Choose the best answer for each item. What is the main purpose of status indicator devices in robots?
To perform mechanical work
To provide feedback about the robot’s current state
To control locomotion directly
To replace sensors
Choose the best answer for each item. Which of the following is an example of a status indicator device?
Hydraulic cylinder
Wheeled chassis
LED light
Servo motor
Choose the best answer for each item. What type of locomotion is most suitable for smooth indoor floors, like in delivery robots?
Legged
Tracked
Wheeled
Aerial
Choose the best answer for each item. A teach pendant is classified as what type of control interface?
Voice-activated
Cloud-based
Hardware-based handheld device
Sensor-only
Choose the best answer for each item. Why is it important to integrate status indicators into a control interface?
To increase robot weight
To allow operators to monitor system status in real time
To replace actuators completely
To reduce battery life
Choose the best answer for each item. Which component would you integrate to provide audible feedback during an emergency?
LCD display
Buzzer
Servo motor
Wheel encoder
Choose the best answer for each item. In an Arduino project, why is an I2C LCD preferred for displaying status?
It requires more pins
It uses fewer wires (typically 4 pins)
It displays only colors
It needs no power
Choose the best answer for each item. How can LEDs be integrated as status indicators in a robotic arm?
By connecting them to output pins and programming color changes
By using them as the main actuator
By removing all sensors
By connecting them only to analog pins
Choose the best answer for each item. For precise angular positioning, such as adjusting a drone camera, which actuator should be selected?
Hydraulic
Solenoid
Servo motor
Pneumatic
Choose the best answer for each item. Which control interface is most appropriate for farmers monitoring soil moisture remotely?
Teach pendant
Graphical User Interface (GUI) with color-coded charts
Manual switches only
Voice commands without display
Choose the best answer for each item. For a security robot needing to move sideways without turning, which locomotion type is best?
Standard wheels
Legged
Omnidirectional wheels
Tracked
Choose the best answer for each item. Why might a buzzer be selected over an LED for obstacle alerts in an outdoor agricultural robot?
Farmers may not always be looking at the screen
Buzzers use more power
LEDs are invisible at night
Buzzers cannot be programmed
Choose the best answer for each item. For gentle fruit plucking, which actuator feature is most important to select?
Maximum force only
Adjustable grip based on object fragility
Fixed high speed
No feedback mechanism
Choose the best answer for each item. When troubleshooting a robot that ignores obstacles, what should you check first?
Replace the battery
Check sensor wiring and mounting alignment
Increase motor speed
Rewrite all code
Choose the best answer for each item. If a servo motor vibrates excessively, what troubleshooting step is most effective?
Increase supply voltage
Update the servo library or adjust PWM settings
Use digitalWrite() instead of the servo library
Remove the potentiometer
Choose the best answer for each item. A line-following robot veers off track. What is the most likely cause related to motors?
Even motor speeds
Uneven motor speeds causing imbalance
Too many code comments
High Wi-Fi signal
Choose the best answer for each item. To isolate whether a problem is hardware or software, what technique is best?
Replace all components
Simulate the operation in code without hardware
Increase battery voltage
Ignore error messages
Choose the best answer for each item. If reducing PWM duty cycle stops motor overheating, what does this indicate?
Battery is insufficient
Motors were being overdriven
Sensors are faulty
Code has no errors
Choose the best answer for each item. What does locomotion refer to in robotics?
How the robot senses its environment
How the robot moves from one place to another
How the robot displays information
How the robot processes commands
Choose the best answer for each item. Which actuator is least suitable for precise proportional control?
Servo motor
Stepper motor
Solenoid
DC motor with encoder
Choose the best answer for each item. Why use millis() instead of delay() when updating status indicators?
To block all other operations
To allow non-blocking timing and multitasking
To increase power usage
To simplify hardware wiring
Choose the best answer for each item. For real-time intrusion alerts over longer distances, which connectivity is better?
Bluetooth
Wi-Fi
No connectivity
Infrared
Choose the best answer for each item. How can loose wiring affecting sensor readings be verified?
Replace the microcontroller
Shake the robot while monitoring data
Disable all sensors
Increase ambient temperature
Choose the best answer for each item. A red LED typically indicates what status in most robotic systems?
Normal operation
Standby mode
Critical error
Low battery
Choose the best answer for each item. Integrating a touchscreen control panel allows operators to:
View interactive real-time data and inputs
Eliminate all indicators
Reduce the need for actuators
Operate without power
Choose the best answer for each item. For a conveyor belt system, which indicator is best for displaying detailed throughput data?
Single LED
Buzzer
LCD display
Servo movement
Choose the best answer for each item. What is the most effective way to document troubleshooting steps?
Memorize everything
Log actions, observations, and results
Rely on verbal discussion only
Fix without recording
Choose the best answer for each item. Why is regular calibration important for sensor accuracy?
To ignore environmental drifts
To compensate for changes over time
To replace sensors daily
To reduce the number of sensors
Choose the best answer for each item. What is a control interface in robotics?
The mechanical moving parts
The means by which humans or programs interact with the robot
Only the power supply
The locomotion system
Choose the best answer for each item. In Arduino, which function is used to control LED brightness as a status indicator?
digitalRead()
analogRead()
analogWrite() (PWM)
Serial.begin()
Choose the best answer for each item. For a plant-watering robot, which actuator is appropriate for pumping water only when needed?
LED
Relay-controlled water pump
Buzzer
LCD
Choose the best answer for each item. Why select omnidirectional wheels for a security robot?
They allow movement in any direction without rotating the body
They are louder
They require no motor
They reduce speed
Choose the best answer for each item. A gripper slips on objects. What evidence suggests adjusting pressure settings?
Code runs perfectly
Servo responds but cannot hold firmly
Power supply is unstable
Arm moves smoothly
Choose the best answer for each item. Which component provides feedback for precise servo positioning?
Built-in potentiometer
External thermometer
Capacitor
Transistor
Choose the best answer for each item. Why integrate multiple indicators (LED, buzzer, LCD)?
To confuse operators
To provide layered feedback for different situations
To increase cost only
To remove actuators
Choose the best answer for each item. For a fire-fighting robot, why select ultrasonic sensors for safety?
To detect obstacles and avoid collisions
To increase speed
To reduce weight only
To display colors
Choose the best answer for each item. Which environmental factor least affects ultrasonic sensors?
Temperature changes
Dust
Humidity
Ambient light levels
Choose the best answer for each item. Prioritizing troubleshooting for sensor drift, the best sequence is:
Replace all sensors immediately
Check wiring → test in controlled environment → recalibrate
Ignore data permanently
Use only one sensor
Choose the best answer for each item. PID control is used with actuators to:
Disable sensors
Adjust movement based on error feedback for smoother control
Increase voltage
Replace wheels
Choose the best answer for each item. For a traffic light simulation project, how are LEDs used?
As actuators only
To change color sequences for status indication
To measure speed
To move mechanically
Choose the best answer for each item. The HC-05 module is integrated for:
Temperature sensing
Wireless Bluetooth control interface
PWM generation
Analog input only
Choose the best answer for each item. If a relay does not activate on Pin A0, why?
A0 is primarily for analog input, not reliable output
No internet connection
Too many delays
Bluetooth unpaired
Choose the best answer for each item. For an AgriBot monitoring soil, which sensor and indicator combination is appropriate?
Soil moisture sensor with color-coded GUI
Flame sensor with buzzer
GPS with wheels
Camera with solenoid
Choose the best answer for each item. To test if a servo has sufficient torque for gripping:
Increase object weight gradually and measure current draw
Rewrite code completely
Remove gripper
Decrease voltage
Choose the best answer for each item. A blue LED on a patrolling security robot indicates:
Error
Low battery
Normal patrolling mode (common convention)
Intruder
Choose the best answer for each item. Why select wheeled locomotion for most indoor robots?
Best for rough terrain
Simple, efficient, and stable on flat surfaces
Most expensive
Slowest option
Choose the best answer for each item. What data should be collected to diagnose overheating?
Motor temperature vs. PWM duty cycle
Room color
Code line count
Battery brand
Choose the best answer for each item. When creating or resetting a robotic project, the first step after troubleshooting is usually:
Present without testing
Apply fixes and retest functionality
Remove all indicators
Increase complexity
