Ultrasonic Sensing with Arduino-Quiz

The HC-SR04 Ultrasonic Sensor can measure distances accurately without physical contact.

• True

• False

What is the main function of the setup() block in an Arduino sketch?

• To run the main program logic.

• To initialize variables and set up conditions that run once.

• To control Arduino's output continuously.

• To read inputs from sensors.

Which of these is NOT a direct application of ultrasonic sensors?

• Measuring room temperature.

• Parking sensors in cars.

• Obstacle detection in robots.

• Distance measurement in electronic tape measures.

Which pin on the Arduino is typically used for analog input from sensors?

• PWM

• A0, A1, A2, etc.

• D0, D1, D2, etc.

• GND

In the Arduino program for the ultrasonic sensor, what does the TRIG pin do?

• • Receives the echo signal

• • Powers the sensor

• • Sends out the sound wave

• • Measures the distance

Ultrasonic sensors can only be used in robotic applications.

• True

• False

What is the role of the ECHO pin in the HC-SR04 sensor?

• • Sends out the sound wave

• • Measures the time taken for the echo to return

• • Powers the sensor

• • Provides ground connection

What is the function of the pinMode() command in an Arduino sketch?

• It sets a specified pin to act as either an input or an output.

• It reads the current mode of a pin.

• It changes the voltage level of a pin.

• It configures the speed of data transmission.

The Arduino loop() function continuously executes as long as the Arduino is powered.

• True

• False

When setting up the LED circuit in Tinkercad, what is the purpose of using resistors with the LEDs?

• • To increase the brightness of the LEDs

• • To connect the LEDs to the ground

• • To limit the current and prevent the LEDs from burning out

• • To power the LEDs directly