Chapter 2 - Operational Safety, Fuel Handling and Product Liability Flashcards
What is the first rule when around combustion gas and appliance testing?
Never assume anything
Measure, check, and test everything
What are the four most important gaseous fuel properties from a safety standpoint? What do they tell us?
Specific Gravity - Rise or fall to the ground
Flame Speed - Flashback risk
Heat Content - Tells how much energy is produced when burned
Self Ignition Temp (SIT) - Lower temp, easier to ignite
Two conditions in which CO is produced
Rich air/fuel combustion and flame impingement
How flame speed can be a safety issue
High flame speed, higher chance of flashback
How are flammability limits a safety feature?
If we can understand the limits and know how to use them, then we can make safer units.
Too far beyond these limits in either direction, and the fuel will not burn
What does SIT stand for
Self Ignition Temperature - temperature at which a fuel will ignite without an external trigger
How does specific gravity affect the flow of fuel through a pipeline
The heavier the gas (larger specific gravity) the more pressure required to drive it through orifices and pipes
How would the chemical make up of commercial LPG in a tank change and why?
It would change because LPG is made up of a variety of gasses (ethane, propane, butane, propylene). These vaporize at different rates. The fuel type that vaporizes slowest will end up being left when the tank is mostly empty.
Why should you wear cotton long sleeves
Plastic materials would melt on the skin and cause worse burns
Why should you use the back of your hand to test a hot surface?
Your hand will naturally close if in contact with something hot and would make the burn worse if you touch something with the “inside” of your hand
Why should you stand to the side when lighting an appliance for the first time?
To avoid flame rollout and other flame-age outside the unit, should it occur
What to check first if the flame is not burning properly
A blocked flue or venting problem
List the main subjects of lawsuits in this industry
Defective appliance design
Defective appliance manufacture
Failure to adequately warn customers of dangers
