Confined Space Awareness Test Exam
Newest 2026 Questions and Correct
Detailed Answers Already Graded A+
1. Which of the following is included but not limited to confided spaces?
A) Vessels
B) Tanks
C) Vaults
D) Trenches
E) All the Above - CORRECT ANSWER-E) All the above
What gas is colorless, odorless, non-toxic, asphyxiant [displaces O2], lighter than
air, explosive range 5%-15% - CORRECT ANSWER-Methane
What gas is colorless, odorless, toxic, asphyxiant [displaces O2], vapor density = to
air, explosive range 12%-74.2% - CORRECT ANSWER-Carbon Monoxide
,What gas is colorless, smells like rotten eggs, toxic, vapor density is 1.19,
explosive range 4%-44%, common in sewage facilities, diminishes your sensitivity
to smell - CORRECT ANSWER-Hydrogen sulfide
What gas is pungent, irritating, 1-10 ppm exposure causes respiratory and pulse
rate increase and decrease in depth of respiration, vapor density is 2.26, non-
flammable - CORRECT ANSWER-Sulfur dioxide
Colorless, odorless, non-combustible gas, toxic, exposure symptoms, headache,
dizziness, restlessness - CORRECT ANSWER-Carbon dioxide
What kind of materials are involved in engulfment incidents? - CORRECT
ANSWER-Grains, sand, gravel, cement, clay, sawdust, liquids
How many times per year are rescue exercises conducted? - CORRECT
ANSWER-At least once
Many workers are injured and killed each year while working in confined spaces.
An estimated ______ of the fatalities have been among the would-be rescuers. -
CORRECT ANSWER-60%
, Studies reveal that every year approximately ______ preventable deaths occur in
confined spaces. - CORRECT ANSWER-67
A space that meets the definition of a confined space and contains other
recognized serious safety and health hazards is what?
A) a confined space
B) a permit-required confined space
C) a non-permit-required confined space
D) not a confined space - CORRECT ANSWER-B) a permit-required confined
space
Entering a permit space can prove fatal for an employee when the O2 level is
below ______ and above _______ - CORRECT ANSWER-Below 19.5% and
Above 23.5%
T/F: If oxygen level is above 23.5% by volume the environment becomes unstable
and prone to flash fires or explosion - CORRECT ANSWER-True
T/F: If oxygen level is below 16% by volume the environment becomes unstable
and prone to flash fires or explosion - CORRECT ANSWER-True
Newest 2026 Questions and Correct
Detailed Answers Already Graded A+
1. Which of the following is included but not limited to confided spaces?
A) Vessels
B) Tanks
C) Vaults
D) Trenches
E) All the Above - CORRECT ANSWER-E) All the above
What gas is colorless, odorless, non-toxic, asphyxiant [displaces O2], lighter than
air, explosive range 5%-15% - CORRECT ANSWER-Methane
What gas is colorless, odorless, toxic, asphyxiant [displaces O2], vapor density = to
air, explosive range 12%-74.2% - CORRECT ANSWER-Carbon Monoxide
,What gas is colorless, smells like rotten eggs, toxic, vapor density is 1.19,
explosive range 4%-44%, common in sewage facilities, diminishes your sensitivity
to smell - CORRECT ANSWER-Hydrogen sulfide
What gas is pungent, irritating, 1-10 ppm exposure causes respiratory and pulse
rate increase and decrease in depth of respiration, vapor density is 2.26, non-
flammable - CORRECT ANSWER-Sulfur dioxide
Colorless, odorless, non-combustible gas, toxic, exposure symptoms, headache,
dizziness, restlessness - CORRECT ANSWER-Carbon dioxide
What kind of materials are involved in engulfment incidents? - CORRECT
ANSWER-Grains, sand, gravel, cement, clay, sawdust, liquids
How many times per year are rescue exercises conducted? - CORRECT
ANSWER-At least once
Many workers are injured and killed each year while working in confined spaces.
An estimated ______ of the fatalities have been among the would-be rescuers. -
CORRECT ANSWER-60%
, Studies reveal that every year approximately ______ preventable deaths occur in
confined spaces. - CORRECT ANSWER-67
A space that meets the definition of a confined space and contains other
recognized serious safety and health hazards is what?
A) a confined space
B) a permit-required confined space
C) a non-permit-required confined space
D) not a confined space - CORRECT ANSWER-B) a permit-required confined
space
Entering a permit space can prove fatal for an employee when the O2 level is
below ______ and above _______ - CORRECT ANSWER-Below 19.5% and
Above 23.5%
T/F: If oxygen level is above 23.5% by volume the environment becomes unstable
and prone to flash fires or explosion - CORRECT ANSWER-True
T/F: If oxygen level is below 16% by volume the environment becomes unstable
and prone to flash fires or explosion - CORRECT ANSWER-True
