Which of the following devices is necessarily required for automatic temperature control in a furnace ?
Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.
A. Thermostat
B. Heating elements of variable resis-tance material
D. Auto-transformer
Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.