Gas Training, Chapter 1, CFESA 2nd Edition Questions With Correct Solutions, Already Passed!!

What happens in a LP tank as gas is drawn off? - The liquid boils off and creates additional gas. Is LP gas more dangerous to work with than natural gas? - LP is heavier than air so it does not dissipate, and is more volatile. Where does natural gas come from? - Wells deep in the ground. Where does LP gas come from? - Byproduct of crude oil, and some is from natural gas pockets. What are the three different gases often termed LP gas? - Propane, Butane, and Ethane. Are LP tanks filled with gas or liquid? - Liquid. Does natural gas have an odor? - No, not when it comes from the ground and is cleaned. What is meant by the "specific gravity" of a gas? - The weight of the gas compared to the air. Is natural gas heavier or lighter than air? - Lighter. Is LP gas heavier or lighter than air? - Heavier. What is the heating value of a cubic foot of natural gas? - Approximately 1000Btu/cu. ft. (Actually varies from 950 to 1150. What is the heating value for LP gas? - 2500 Btu/cu. ft.Which gas is more volatile, natural or LP gas? Why? - LP. It has a higher Btu rating per cubic foot, and is heavie than air so it does not dissipate. How should you check for gas leaks? - Soap bubbles, or electronic leak detector.