Computer Science for IGCSE & O level - Hardware (Section 13 - No. 16)
In a central heating system, what action does the microprocessor take if the sensor detects the temperature is below the pre-set value?
It shuts off the pump.
It opens the gas valve.
It closes the gas valve.
It ignores the sensor reading.
Förklaring
If the temperature is too low, the microprocessor opens the gas valve to allow for more heating.