Computer Science for IGCSE & O level - Hardware (Section 4 - No. 13)
In a central heating system, what happens if the measured temperature is less than the pre-set temperature?
The gas valve is closed.
The pump stops circulating water.
The heater is turned on.
The microprocessor ignores the sensor data.
Explanation
If the temperature is too low, the heater will be turned on to warm the area.