Gas Heat ESCO Practice Exam

The specification of 40 - 70 degrees on a furnace nameplate refers to which of the following?

1. Allowed gas pressure range

2. Temperature rise

3. Voltage requirement

4. Wattage usage

The correct answer is: Temperature rise

The temperature rise of a furnace refers to the difference between the temperature of the heated air leaving the furnace and the temperature of the cool air it takes in. This specification of 40-70 degrees on a furnace nameplate means that the furnace is capable of increasing the temperature of the air by a range of 40-70 degrees from its initial cool temperature. Therefore, options A, C, and D are incorrect as they do not pertain to the temperature rise of the furnace. Option A refers to the allowed gas pressure range, which is important for the safe and efficient operation of the furnace. Option C refers to the voltage requirement of the furnace, which is necessary for proper electrical functioning. And option D refers to the wattage usage, which is the amount of power the furnace uses. These are all important specifications to consider when installing and operating a furnace, but they are not related to the given temperature rise specification.