Gas Fitter Practice Test

What would be the appliance input when clocking a 5 foot dial on a gas meter for 63 seconds?

1. 258,000 BTU

2. 286,000 BTU

3. 268,000 BTU

4. 284,000 BTU

The correct answer is: 286,000 BTU

To determine the correct appliance input when clocking a gas meter, you need to follow a specific calculation based on the volume of gas measured and the corresponding BTU conversion factors. In this situation, clocking a gas meter typically involves noting the amount of gas that flows through during a specific period (in this case, 63 seconds) and using that information along with the meter's characteristics (such as the size and type of the meter) to calculate the BTU input. The volume of gas recorded on the meter's dial for the 5-foot measurement over 63 seconds is converted to a BTU input using standardized conversion factors that account for the energy content of the gas. Natural gas typically has an approximate energy content of around 1,000 BTU per cubic foot. Therefore, the volume (in cubic feet) indicated on the meter during that time is multiplied by the calorific value of the gas to arrive at the total BTUs for the time measured. In this case, the calculation leads to an appliance input of 286,000 BTU, which corresponds to choice B. This input value is derived from the specific flow rate observed through the gas meter, taking into account the gas's energy content and the time clocked, establishing