Gas Heat ESCO Practice Exam

A technician wraps a thermostat wire ten times around his clamp on ammeter and measures 5.5 amps between R and W terminals on the thermostat sub-base. He should set the heat anticipator to:

1. 0.0055

2. 0.55

3. 5.5

4. 55

The correct answer is: 0.55

A. 0.0055 is incorrect because this is a very small number and doesn't accurately reflect the amperage measurement of 5.5 amps. C. 5.5 is incorrect because this is the same number as the amperage measurement and does not account for the fact that the wire was wrapped ten times around the ammeter clamp. This would result in a higher amperage reading. D. 55 is incorrect because this number is too high to accurately reflect the amperage measurement of 5.5 amps and does not take into account the wire being wrapped around the ammeter. The correct answer is B because the wire was wrapped around the ammeter ten times, the amperage measurement needs to be divided by ten to get an accurate reading. Therefore, setting the heat anticipator to 0.55 would reflect the correct amperage measurement of 0.55 amps.