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CHMM Practice Exam Questions and
Correct Answers/ Latest Update / Already
Graded
When polonium (atomic mass 210 & atomic number 84) emits an
alpha particle, which of the following decay products results?
a. Bismuth (atomic mass 209 & atomic number 83)
b. Lead (atomic mass 206 & atomic number 82)
c. Thallium (atomic mass 204 & atomic number 81)
d. Mercury (atomic mass 201 & atomic number 80)
Ans: b. Lead (atomic mass 206 & atomic number 82)
Atomic Mass is:
a. the number of protons in the nucleus
b. the total number of protons & neutrons in the nucleus
c. a nuclear particle that has an atomic weight of one and is electrically
neutral
d. a particle that contains all the positive charge and essentially all the
weight of the atom
Ans: b. the total number of protons & neutrons in the nucleus
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Which of the following is not a chemical asphyxiant?
a. carbon monoxide
b. carbon dioxide
c. hydrogen sulfide
d. hydrogen cyanide
Ans: c. hydrogen sulfide
Which of the following displaces oxygen but does not actually interfere
with
the human body's ability to use oxygen?
a. carbon dioxide
b. nitrogen
c. noble gases
d. all of the above
Ans: d. all of the above
Which of the following statements regarding oxidation is always
correct?
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a. oxygen must be a chemical reactant for an oxidation reaction to
occur
b. oxidation is a violent reaction that always produces heat and light
c. oxidation always results in at least one electron being transferred
from one atom to another
d. the valence of the atom is reduced occurs when it gives up an
oxidation electron
Ans: c. oxidation always results in at least one electron being
transferred from one atom to another
Which of the following seven steps for preparing hazardous materials
for transport is in the correct order?
a. proper shipping name, classify, package, mark, label, paperwork,
placard
b. classify, proper shipping name, package, mark, label, paperwork,
placard
c. package, classify, proper shipping name, mark, label, paperwork,
placard
d. package, mark, label, classify, proper shipping name, paperwork,
placard
Ans: b. classify, proper shipping name, package, mark, label,
paperwork, placard
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Boiling Point is the temperature at which:
a. the vapor pressure of a solid just equals atmospheric pressure
b. the vapor pressure of a liquid is greater than atmospheric pressure
c. the vapor pressure of a liquid is less than atmospheric pressure
d. the vapor pressure of a liquid just equals atmospheric pressure
Ans: d. the vapor pressure of a liquid just equals atmospheric
pressure
Flash point is the:
a. maximum temperature of a liquid at which it give off vapors
sufficient to form an ignitable mixture with air
b. maximum temperature of a liquid at which it gives off vapors
sufficient to form an ignitable mixture with water
c. minimum temperature of a liquid at which it gives off vapors
sufficient to form an ignitable mixture with air
d. minimum temperature of a liquid at which it gives off vapors
sufficient to form an ignitable mixture with water
Ans: c. minimum temperature of a liquid at which it gives off
vapors sufficient to form an ignitable mixture with air
All rights reserved © 2025/ 2026 |
CHMM Practice Exam Questions and
Correct Answers/ Latest Update / Already
Graded
When polonium (atomic mass 210 & atomic number 84) emits an
alpha particle, which of the following decay products results?
a. Bismuth (atomic mass 209 & atomic number 83)
b. Lead (atomic mass 206 & atomic number 82)
c. Thallium (atomic mass 204 & atomic number 81)
d. Mercury (atomic mass 201 & atomic number 80)
Ans: b. Lead (atomic mass 206 & atomic number 82)
Atomic Mass is:
a. the number of protons in the nucleus
b. the total number of protons & neutrons in the nucleus
c. a nuclear particle that has an atomic weight of one and is electrically
neutral
d. a particle that contains all the positive charge and essentially all the
weight of the atom
Ans: b. the total number of protons & neutrons in the nucleus
All rights reserved © 2025/ 2026 |
, Page |2
Which of the following is not a chemical asphyxiant?
a. carbon monoxide
b. carbon dioxide
c. hydrogen sulfide
d. hydrogen cyanide
Ans: c. hydrogen sulfide
Which of the following displaces oxygen but does not actually interfere
with
the human body's ability to use oxygen?
a. carbon dioxide
b. nitrogen
c. noble gases
d. all of the above
Ans: d. all of the above
Which of the following statements regarding oxidation is always
correct?
All rights reserved © 2025/ 2026 |
, Page |3
a. oxygen must be a chemical reactant for an oxidation reaction to
occur
b. oxidation is a violent reaction that always produces heat and light
c. oxidation always results in at least one electron being transferred
from one atom to another
d. the valence of the atom is reduced occurs when it gives up an
oxidation electron
Ans: c. oxidation always results in at least one electron being
transferred from one atom to another
Which of the following seven steps for preparing hazardous materials
for transport is in the correct order?
a. proper shipping name, classify, package, mark, label, paperwork,
placard
b. classify, proper shipping name, package, mark, label, paperwork,
placard
c. package, classify, proper shipping name, mark, label, paperwork,
placard
d. package, mark, label, classify, proper shipping name, paperwork,
placard
Ans: b. classify, proper shipping name, package, mark, label,
paperwork, placard
All rights reserved © 2025/ 2026 |
, Page |4
Boiling Point is the temperature at which:
a. the vapor pressure of a solid just equals atmospheric pressure
b. the vapor pressure of a liquid is greater than atmospheric pressure
c. the vapor pressure of a liquid is less than atmospheric pressure
d. the vapor pressure of a liquid just equals atmospheric pressure
Ans: d. the vapor pressure of a liquid just equals atmospheric
pressure
Flash point is the:
a. maximum temperature of a liquid at which it give off vapors
sufficient to form an ignitable mixture with air
b. maximum temperature of a liquid at which it gives off vapors
sufficient to form an ignitable mixture with water
c. minimum temperature of a liquid at which it gives off vapors
sufficient to form an ignitable mixture with air
d. minimum temperature of a liquid at which it gives off vapors
sufficient to form an ignitable mixture with water
Ans: c. minimum temperature of a liquid at which it gives off
vapors sufficient to form an ignitable mixture with air
All rights reserved © 2025/ 2026 |
