Irrigation Module 3 Quiz | OceanRemote Education

1 What is the benefit of optocoupler relays?

A) Protects ESP32 from spikes B) Increases power C) Reduces cost D) Faster switching

2 What logic turns ON most relay modules?

A) digitalWrite(pin, HIGH) B) digitalWrite(pin, INPUT) C) digitalWrite(pin, LOW) D) analogWrite(pin, 255)

3 What should limit pump maximum run time?

A) Soil moisture only B) Safety maximum timer C) Weather forecast D) Time of day

4 What does a watchdog timer do?

A) Increases speed B) Saves power C) Measures time D) Resets ESP32 if code hangs

5 What should override irrigation when raining?

A) Rain sensor B) Temperature sensor C) Humidity sensor D) Wind sensor

6 What protects ESP32 from pump electrical spikes?

A) Resistor B) Optocoupler relay C) Capacitor D) LED

7 What is a recommended maximum pump run time?

A) 60 seconds B) 5 minutes C) 10 minutes D) 1 hour