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Summative Test: Final Elements and Indicating Devices (FEI)

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

Choose the best answer for each item. What is the primary function of an actuator in a robotic system?

a)

Display information to the user

b)

Convert control signals into physical movement

c)

Detect environmental changes

d)

Store electrical energy

2.

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?

a)

Servo motor

b)

Stepper motor

c)

Hydraulic actuator

d)

DC motor

3.

Choose the best answer for each item. What is the main purpose of status indicator devices in robots?

a)

To perform mechanical work

b)

To provide feedback about the robot’s current state

c)

To control locomotion directly

d)

To replace sensors

4.

Choose the best answer for each item. Which of the following is an example of a status indicator device?

a)

Hydraulic cylinder

b)

Wheeled chassis

c)

LED light

d)

Servo motor

5.

Choose the best answer for each item. What type of locomotion is most suitable for smooth indoor floors, like in delivery robots?

a)

Legged

b)

Tracked

c)

Wheeled

d)

Aerial

6.

Choose the best answer for each item. A teach pendant is classified as what type of control interface?

a)

Voice-activated

b)

Cloud-based

c)

Hardware-based handheld device

d)

Sensor-only

7.

Choose the best answer for each item. Why is it important to integrate status indicators into a control interface?

a)

To increase robot weight

b)

To allow operators to monitor system status in real time

c)

To replace actuators completely

d)

To reduce battery life

8.

Choose the best answer for each item. Which component would you integrate to provide audible feedback during an emergency?

a)

LCD display

b)

Buzzer

c)

Servo motor

d)

Wheel encoder

9.

Choose the best answer for each item. In an Arduino project, why is an I2C LCD preferred for displaying status?

a)

It requires more pins

b)

It uses fewer wires (typically 4 pins)

c)

It displays only colors

d)

It needs no power

10.

Choose the best answer for each item. How can LEDs be integrated as status indicators in a robotic arm?

a)

By connecting them to output pins and programming color changes

b)

By using them as the main actuator

c)

By removing all sensors

d)

By connecting them only to analog pins

11.

Choose the best answer for each item. For precise angular positioning, such as adjusting a drone camera, which actuator should be selected?

a)

Hydraulic

b)

Solenoid

c)

Servo motor

d)

Pneumatic

12.

Choose the best answer for each item. Which control interface is most appropriate for farmers monitoring soil moisture remotely?

a)

Teach pendant

b)

Graphical User Interface (GUI) with color-coded charts

c)

Manual switches only

d)

Voice commands without display

13.

Choose the best answer for each item. For a security robot needing to move sideways without turning, which locomotion type is best?

a)

Standard wheels

b)

Legged

c)

Omnidirectional wheels

d)

Tracked

14.

Choose the best answer for each item. Why might a buzzer be selected over an LED for obstacle alerts in an outdoor agricultural robot?

a)

Farmers may not always be looking at the screen

b)

Buzzers use more power

c)

LEDs are invisible at night

d)

Buzzers cannot be programmed

15.

Choose the best answer for each item. For gentle fruit plucking, which actuator feature is most important to select?

a)

Maximum force only

b)

Adjustable grip based on object fragility

c)

Fixed high speed

d)

No feedback mechanism

16.

Choose the best answer for each item. When troubleshooting a robot that ignores obstacles, what should you check first?

a)

Replace the battery

b)

Check sensor wiring and mounting alignment

c)

Increase motor speed

d)

Rewrite all code

17.

Choose the best answer for each item. If a servo motor vibrates excessively, what troubleshooting step is most effective?

a)

Increase supply voltage

b)

Update the servo library or adjust PWM settings

c)

Use digitalWrite() instead of the servo library

d)

Remove the potentiometer

18.

Choose the best answer for each item. A line-following robot veers off track. What is the most likely cause related to motors?

a)

Even motor speeds

b)

Uneven motor speeds causing imbalance

c)

Too many code comments

d)

High Wi-Fi signal

19.

Choose the best answer for each item. To isolate whether a problem is hardware or software, what technique is best?

a)

Replace all components

b)

Simulate the operation in code without hardware

c)

Increase battery voltage

d)

Ignore error messages

20.

Choose the best answer for each item. If reducing PWM duty cycle stops motor overheating, what does this indicate?

a)

Battery is insufficient

b)

Motors were being overdriven

c)

Sensors are faulty

d)

Code has no errors

21.

Choose the best answer for each item. What does locomotion refer to in robotics?

a)

How the robot senses its environment

b)

How the robot moves from one place to another

c)

How the robot displays information

d)

How the robot processes commands

22.

Choose the best answer for each item. Which actuator is least suitable for precise proportional control?

a)

Servo motor

b)

Stepper motor

c)

Solenoid

d)

DC motor with encoder

23.

Choose the best answer for each item. Why use millis() instead of delay() when updating status indicators?

a)

To block all other operations

b)

To allow non-blocking timing and multitasking

c)

To increase power usage

d)

To simplify hardware wiring

24.

Choose the best answer for each item. For real-time intrusion alerts over longer distances, which connectivity is better?

a)

Bluetooth

b)

Wi-Fi

c)

No connectivity

d)

Infrared

25.

Choose the best answer for each item. How can loose wiring affecting sensor readings be verified?

a)

Replace the microcontroller

b)

Shake the robot while monitoring data

c)

Disable all sensors

d)

Increase ambient temperature

26.

Choose the best answer for each item. A red LED typically indicates what status in most robotic systems?

a)

Normal operation

b)

Standby mode

c)

Critical error

d)

Low battery

27.

Choose the best answer for each item. Integrating a touchscreen control panel allows operators to:

a)

View interactive real-time data and inputs

b)

Eliminate all indicators

c)

Reduce the need for actuators

d)

Operate without power

28.

Choose the best answer for each item. For a conveyor belt system, which indicator is best for displaying detailed throughput data?

a)

Single LED

b)

Buzzer

c)

LCD display

d)

Servo movement

29.

Choose the best answer for each item. What is the most effective way to document troubleshooting steps?

a)

Memorize everything

b)

Log actions, observations, and results

c)

Rely on verbal discussion only

d)

Fix without recording

30.

Choose the best answer for each item. Why is regular calibration important for sensor accuracy?

a)

To ignore environmental drifts

b)

To compensate for changes over time

c)

To replace sensors daily

d)

To reduce the number of sensors

31.

Choose the best answer for each item. What is a control interface in robotics?

a)

The mechanical moving parts

b)

The means by which humans or programs interact with the robot

c)

Only the power supply

d)

The locomotion system

32.

Choose the best answer for each item. In Arduino, which function is used to control LED brightness as a status indicator?

a)

digitalRead()

b)

analogRead()

c)

analogWrite() (PWM)

d)

Serial.begin()

33.

Choose the best answer for each item. For a plant-watering robot, which actuator is appropriate for pumping water only when needed?

a)

LED

b)

Relay-controlled water pump

c)

Buzzer

d)

LCD

34.

Choose the best answer for each item. Why select omnidirectional wheels for a security robot?

a)

They allow movement in any direction without rotating the body

b)

They are louder

c)

They require no motor

d)

They reduce speed

35.

Choose the best answer for each item. A gripper slips on objects. What evidence suggests adjusting pressure settings?

a)

Code runs perfectly

b)

Servo responds but cannot hold firmly

c)

Power supply is unstable

d)

Arm moves smoothly

36.

Choose the best answer for each item. Which component provides feedback for precise servo positioning?

a)

Built-in potentiometer

b)

External thermometer

c)

Capacitor

d)

Transistor

37.

Choose the best answer for each item. Why integrate multiple indicators (LED, buzzer, LCD)?

a)

To confuse operators

b)

To provide layered feedback for different situations

c)

To increase cost only

d)

To remove actuators

38.

Choose the best answer for each item. For a fire-fighting robot, why select ultrasonic sensors for safety?

a)

To detect obstacles and avoid collisions

b)

To increase speed

c)

To reduce weight only

d)

To display colors

39.

Choose the best answer for each item. Which environmental factor least affects ultrasonic sensors?

a)

Temperature changes

b)

Dust

c)

Humidity

d)

Ambient light levels

40.

Choose the best answer for each item. Prioritizing troubleshooting for sensor drift, the best sequence is:

a)

Replace all sensors immediately

b)

Check wiring → test in controlled environment → recalibrate

c)

Ignore data permanently

d)

Use only one sensor

41.

Choose the best answer for each item. PID control is used with actuators to:

a)

Disable sensors

b)

Adjust movement based on error feedback for smoother control

c)

Increase voltage

d)

Replace wheels

42.

Choose the best answer for each item. For a traffic light simulation project, how are LEDs used?

a)

As actuators only

b)

To change color sequences for status indication

c)

To measure speed

d)

To move mechanically

43.

Choose the best answer for each item. The HC-05 module is integrated for:

a)

Temperature sensing

b)

Wireless Bluetooth control interface

c)

PWM generation

d)

Analog input only

44.

Choose the best answer for each item. If a relay does not activate on Pin A0, why?

a)

A0 is primarily for analog input, not reliable output

b)

No internet connection

c)

Too many delays

d)

Bluetooth unpaired

45.

Choose the best answer for each item. For an AgriBot monitoring soil, which sensor and indicator combination is appropriate?

a)

Soil moisture sensor with color-coded GUI

b)

Flame sensor with buzzer

c)

GPS with wheels

d)

Camera with solenoid

46.

Choose the best answer for each item. To test if a servo has sufficient torque for gripping:

a)

Increase object weight gradually and measure current draw

b)

Rewrite code completely

c)

Remove gripper

d)

Decrease voltage

47.

Choose the best answer for each item. A blue LED on a patrolling security robot indicates:

a)

Error

b)

Low battery

c)

Normal patrolling mode (common convention)

d)

Intruder

48.

Choose the best answer for each item. Why select wheeled locomotion for most indoor robots?

a)

Best for rough terrain

b)

Simple, efficient, and stable on flat surfaces

c)

Most expensive

d)

Slowest option

49.

Choose the best answer for each item. What data should be collected to diagnose overheating?

a)

Motor temperature vs. PWM duty cycle

b)

Room color

c)

Code line count

d)

Battery brand

50.

Choose the best answer for each item. When creating or resetting a robotic project, the first step after troubleshooting is usually:

a)

Present without testing

b)

Apply fixes and retest functionality

c)

Remove all indicators

d)

Increase complexity