If a 1/2 cubic foot test dial makes one complete revolution in 18 seconds, what is the input in BTUH?

To determine the input in BTUH from the revolutions of a gas meter dial, specific calculations based on the flow rate and the characteristics of the meter are needed.

In this case, since the meter is 1/2 cubic foot, each complete revolution corresponds to 0.5 cubic feet of gas. Knowing that one complete revolution occurs every 18 seconds allows us to calculate the gas flow over a given time period.

First, calculate how many revolutions occur in one hour (3600 seconds):

1 hour = 3600 seconds

Revolutions in one hour = 3600 seconds / 18 seconds per revolution = 200 revolutions.

Since each revolution accounts for 0.5 cubic feet:

Total cubic feet in one hour = 200 revolutions * 0.5 cubic feet/revolution = 100 cubic feet.

Next, to convert cubic feet per hour into BTUH, we use the conversion factor. The standard conversion is that 1 cubic foot of natural gas provides approximately 1,000 BTU (this is an average value and may vary depending on the specific gas composition).

Therefore, to find the BTUH:

Total BTUH = 100 cubic feet/hour * 1,000 BTU