Analog Sensors Quiz | OceanRemote Education

1 What is the resolution of ESP32 ADC?

A) 8-bit (0-255) B) 10-bit (0-1023) C) 12-bit (0-4095) D) 16-bit (0-65535)

2 Which GPIO pins support analog reading?

A) GPIO0-5 B) GPIO16-23 C) GPIO12-19 D) GPIO32-39

3 What is the advantage of capacitive soil moisture sensors?

A) Don't corrode over time B) Cheaper price C) More accurate D) Use digital output

4 Which temperature sensor is waterproof for soil use?

A) DHT22 B) DS18B20 C) BMP280 D) LM35

5 What is the typical water savings with soil moisture sensors?

A) 10-15% B) 30-40% C) 60-70% D) 80-90%

6 What does DHT22 measure?

A) Temperature only B) Soil moisture only C) Temperature AND humidity D) Light intensity

7 What is the correct formula to convert ADC reading to voltage?

A) reading * 3.3 / 4095 B) reading * 5 / 1023 C) reading * 3.3 / 1023 D) reading * 5 / 4095