Pipeline Emergencies

Question 1

Natural gas is ___ than air.

Answer 1

1. Lighter;

Question 2

Hydrogen sulfide (H2S) is ___ than air, and has a ___ odor.

Answer 2

1. Heavier;

2. Rotten egg;

Question 3

Gas pipeline mainline valves should only be operated by ___.

Answer 3

1. Gas company personnel;