PROPANE EMERGENCY EXAM
QUESTIONS AND VERIFIED
ANSWERS
Who is included in the ICS command staff? - ANSWER Safety officer, liaison
officer, the information officer (PIO)
Who is included in the ICS general staff? - ANSWER Operations, planning,
logistics, finance/administration
What is a propane industrial plant? - ANSWER If the facility that utilizes LP -
-gas incidental to plant operations with storage of 2000 gallon water capacity or
more
What does ASHRAE stand for? - ANSWER American Society of Heating,
Refrigeration, and Air-conditioning Engineers
How was propane classified according to its chemical structure? - ANSWER
Is a straight-chain hydrocarbon that belongs to the alkanes chemical class
What percentage of propane and butane comes from crude oil and what
percentage from natural gas? - ANSWER 30% is extracted with and refined
from crude oil, 70% is processed from "wet" natural gas
What does commercial propane blend consist of? - ANSWER Mainly of
propane of propylene
What does HD5 propane consist of? - ANSWER Propane with a maximum of
5% propylene
What does commercial butane blend consist of? - ANSWER Butane and
butylene
, What does butane/propane blend consist of? - ANSWER A mixture of both
butane and propane given in percentages. Typical blend is 60/40 indicating 60%
butane and 40% propane
What is the vapor density of propane at 60°F? - ANSWER 1.52
What percent of the LEL must propane be detected by the Ethyl mercaptan
added according to NFPA 58? - ANSWER 20%, at that level it is readily
detected by a person with a normal sense of smell
At what rate is a ethyl mercaptan added to propane? - ANSWER 1 pound per
10,000 gallons, equates to 1ppb
What is a BTU? - ANSWER The amount of heat needed to raise the
temperature of 1 pound of water 1°F
What is latent heat of vaporization? - ANSWER When the temperature of
water doesn't go beyond 212°F no matter how much he is added
What is the boiling point of propane? - ANSWER -44°F
How much capacity are propane tanks and cylinders usually filled two? -
ANSWER 80% to leave room for liquid propane to expand freely with ambient
temperatures
What is the flammability range of commercial propane? - ANSWER 2.15% to
9.6%
What is the ideal combustion ratio of propane? - ANSWER 24 parts of air to 1
part of propane, 96% to 4%
What is the ignition temperature and heating value of propane? - ANSWER
Approximately 920°F giving off 2488 BTUs per cubic foot
What compound that can be a product of incomplete propane combustion has a
sharp penetrating odor? - ANSWER Aldehydes, if they are present CO will
always be present but not the other way around
QUESTIONS AND VERIFIED
ANSWERS
Who is included in the ICS command staff? - ANSWER Safety officer, liaison
officer, the information officer (PIO)
Who is included in the ICS general staff? - ANSWER Operations, planning,
logistics, finance/administration
What is a propane industrial plant? - ANSWER If the facility that utilizes LP -
-gas incidental to plant operations with storage of 2000 gallon water capacity or
more
What does ASHRAE stand for? - ANSWER American Society of Heating,
Refrigeration, and Air-conditioning Engineers
How was propane classified according to its chemical structure? - ANSWER
Is a straight-chain hydrocarbon that belongs to the alkanes chemical class
What percentage of propane and butane comes from crude oil and what
percentage from natural gas? - ANSWER 30% is extracted with and refined
from crude oil, 70% is processed from "wet" natural gas
What does commercial propane blend consist of? - ANSWER Mainly of
propane of propylene
What does HD5 propane consist of? - ANSWER Propane with a maximum of
5% propylene
What does commercial butane blend consist of? - ANSWER Butane and
butylene
, What does butane/propane blend consist of? - ANSWER A mixture of both
butane and propane given in percentages. Typical blend is 60/40 indicating 60%
butane and 40% propane
What is the vapor density of propane at 60°F? - ANSWER 1.52
What percent of the LEL must propane be detected by the Ethyl mercaptan
added according to NFPA 58? - ANSWER 20%, at that level it is readily
detected by a person with a normal sense of smell
At what rate is a ethyl mercaptan added to propane? - ANSWER 1 pound per
10,000 gallons, equates to 1ppb
What is a BTU? - ANSWER The amount of heat needed to raise the
temperature of 1 pound of water 1°F
What is latent heat of vaporization? - ANSWER When the temperature of
water doesn't go beyond 212°F no matter how much he is added
What is the boiling point of propane? - ANSWER -44°F
How much capacity are propane tanks and cylinders usually filled two? -
ANSWER 80% to leave room for liquid propane to expand freely with ambient
temperatures
What is the flammability range of commercial propane? - ANSWER 2.15% to
9.6%
What is the ideal combustion ratio of propane? - ANSWER 24 parts of air to 1
part of propane, 96% to 4%
What is the ignition temperature and heating value of propane? - ANSWER
Approximately 920°F giving off 2488 BTUs per cubic foot
What compound that can be a product of incomplete propane combustion has a
sharp penetrating odor? - ANSWER Aldehydes, if they are present CO will
always be present but not the other way around
