Session 15

What does an ultrasonic sensor measure?

• Light intensity

• Water temperature

• Distance to an object using sound waves

• Air pressure

How does an ultrasonic sensor detect an object?

• By detecting changes in temperature

• By touching the object

• By using sound waves and measuring echo time

• By using infrared light

What type of sensor is an ultrasonic sensor?

• Contact sensor

• Heat sensor

• Non-contact sensor

• Visual sensor

What real-life animal uses a similar method as ultrasonic sensors?

• Dogs

• Cats

• Bats

• Fish

In parking assistance systems, what happens as a car gets closer to an object?

• The engine slows down

• The beep gets louder

• The beep frequency increases

• The lights blink

Why are ultrasonic sensors useful for water tanks?

• They heat the water

• They change water color

• They measure water level without touching it

• They clean the tank

Which of the following is NOT an advantage of ultrasonic sensors?

• Can detect objects in the dark

• Works without touching objects

• Only works on metal surfaces

• Can measure distance in any light condition

What happens when ultrasonic waves hit an object?

• They disappear

• They change into light

• They bounce back like an echo

• They heat up the object

Which of the following is a common application of ultrasonic sensors in robotics?

• Playing music

• Obstacle detection

• Charging batteries

• Drawing images

Why are ultrasonic sensors better than cameras in some situations?

• They are heavier

• They use more power

• They work in both dark and bright conditions

• They need sunlight to work