Propane Emergencies UPDATED ACTUAL
Exam Questions and CORRECT Answers
Who are included in the ICS command staff? - CORRECT ANSWER - Safety officer,
liaison officer, the information officer (PIO)
Who are included in the ICS general staff? - CORRECT ANSWER - Operations, planning,
logistics, finance/administration
What is a propane industrial plant? - CORRECT ANSWER - If facility that utilizes LP -
gas incidental to plant operations with storage of 2000 gallon water capacity or more
What does ASHRAE stand for? - CORRECT ANSWER - American Society of Heating,
Refrigeration, and Air-conditioning Engineers
How was propane classified according to its chemical structure? - CORRECT 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? - CORRECT ANSWER - 30% is extracted with and refined from crude oil, 70% is
processed from "wet" natural gas
What does commercial propane blend consist of? - CORRECT ANSWER - Mainly of
propane of propylene
What does HD5 propane consist of? - CORRECT ANSWER - Propane with a maximum
of 5% propylene
What does commercial butane blend consist of? - CORRECT ANSWER - Butane and
butylene
, What does butane/propane blend consist of? - CORRECT 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? - CORRECT ANSWER - 1.52
What percent of the LEL must propane be detected by the Ethyl mercaptan added according to
NFPA 58? - CORRECT 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? - CORRECT ANSWER - 1 pound per
10,000 gallons, equates to 1ppb
What is a BTU? - CORRECT ANSWER - The amount of heat needed to raise the
temperature of 1 pound of water 1°F
What is latent heat of vaporization? - CORRECT 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? - CORRECT ANSWER - -44°F
How much capacity are propane tanks and cylinders usually filled two? - CORRECT
ANSWER - 80% to leave room for liquid propane to expand freely with ambient
temperatures
What is the flammability range of commercial propane? - CORRECT ANSWER - 2.15%
to 9.6%
What is the ideal combustion ratio of propane? - CORRECT ANSWER - 24 parts of air to
1 part of propane, 96% to 4%
Exam Questions and CORRECT Answers
Who are included in the ICS command staff? - CORRECT ANSWER - Safety officer,
liaison officer, the information officer (PIO)
Who are included in the ICS general staff? - CORRECT ANSWER - Operations, planning,
logistics, finance/administration
What is a propane industrial plant? - CORRECT ANSWER - If facility that utilizes LP -
gas incidental to plant operations with storage of 2000 gallon water capacity or more
What does ASHRAE stand for? - CORRECT ANSWER - American Society of Heating,
Refrigeration, and Air-conditioning Engineers
How was propane classified according to its chemical structure? - CORRECT 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? - CORRECT ANSWER - 30% is extracted with and refined from crude oil, 70% is
processed from "wet" natural gas
What does commercial propane blend consist of? - CORRECT ANSWER - Mainly of
propane of propylene
What does HD5 propane consist of? - CORRECT ANSWER - Propane with a maximum
of 5% propylene
What does commercial butane blend consist of? - CORRECT ANSWER - Butane and
butylene
, What does butane/propane blend consist of? - CORRECT 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? - CORRECT ANSWER - 1.52
What percent of the LEL must propane be detected by the Ethyl mercaptan added according to
NFPA 58? - CORRECT 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? - CORRECT ANSWER - 1 pound per
10,000 gallons, equates to 1ppb
What is a BTU? - CORRECT ANSWER - The amount of heat needed to raise the
temperature of 1 pound of water 1°F
What is latent heat of vaporization? - CORRECT 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? - CORRECT ANSWER - -44°F
How much capacity are propane tanks and cylinders usually filled two? - CORRECT
ANSWER - 80% to leave room for liquid propane to expand freely with ambient
temperatures
What is the flammability range of commercial propane? - CORRECT ANSWER - 2.15%
to 9.6%
What is the ideal combustion ratio of propane? - CORRECT ANSWER - 24 parts of air to
1 part of propane, 96% to 4%
