Physical Properties Flashcards
Natural gas is _______ , _______ , _______ to the human senses.
Colorless , Tasteless, Odorless
What is the name of the chemical used to odorize natural gas?
Mercaptane
Natural gas is Non-_____ , and Non-_______ to living things but can be harmful under certain circumstances.
Toxic , Poisonous
A living thing could suffocate or _______ in an atmosphere full of natural gas.
Asphyxiate
the Specific gravity of natural gas is ______ compared to Air with a Specific gravity of ( 1 ).
( .6 )
When natural is exposed to temperature fluctuations, it responds by _____ when heated, and _____ when cooled.
Expanding , Contracting
What are the three elements to the fire triangle?
Fuel ( Natural Gas )
Oxygen ( From the air )
Heat ( Ignition Source )
If there is too much oxygen and not enough natural gas in the mix, it is considered too ______ , and the gas won’t burn.
Lean
When there is too much natural gas and not enough oxygen in the mix, it is considered too _____ , and the gas won’t burn.
Rich
The minimum percentage of gas required for combustion is known as _______ .
LEL , Lower Explosive Limit
The maximum percentage of gas that will allow for combustion is called the _______ .
UEL , Upper Explosive Limit
What is the range of Fuel to Oxygen mixture for natural gas combustion ?
5% - 15% Percent
What is the ideal mixture of Fuel to Oxygen for natural gas combustion ?
10% Percent Gas
90% Percent Air
The idea amount of heat for natural gas combustion is an ignition temperature between ______ AND _____ degrees F.
1100 / 1200
When natural gas combustion is controlled, the burning produces ______ .
Energy
When the rate of combustion is not controlled, the reaction may result in an ______ .
Explosion
Two harmless byproducts of complete natural gas combustion are ________ AND ______ .
Carbon DIOXIDE , Water Vapor
When natural gas is burned without the proper amount of air for combustion, a byproduct of this incomplete combustion may be _______, which is TOXIC.
Carbon MONOXIDE
