Gas Training, Chapter 1, CFESA 2nd Edition, 2025 Exam Q’s and A’s

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Gas Training, Chapter 1, CFESA 2nd Edition, 2025 Exam Q’s and A’s

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Gas Training, Chapter 1, CFESA 2nd Edition, 2025 Exam Q’s and A’s

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Gas Training, Chapter 1, CFESA 2nd
Edition, 2025 Exam Q’s and A’s
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.

- What happens in a LP tank as gas is drawn off? - -The liquid boils off and
creates additional gas.

- 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.

- 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.

- 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.

- How should you check for gas leaks? - -Soap bubbles, or electronic leak
detector.

- 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.

-

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