AMRT STUDY GUIDE WITH CORRECT ANSWERS (LATEST) 2025 UPDATE!!.

AMRT STUDY GUIDE WITH CORRECT ANSWERS (LATEST) 2025
UPDATE!!.

Question 1
The amount of moisture available on a surface that mold can use to support growth is known as
the:
A) Relative Humidity (RH)
B) Moisture Content (MC)
C) Equilibrium Relative Humidity (ERH)
D) Water activity
E) Saturation Point (SP)
Correct Answer: D) Water activity
Rationale: Water activity is the specific measure of the free (available) moisture on a surface
that mold can use to support growth.

Question 2
How do molds primarily replicate in the environment?
A) Binary fission
B) Budding
C) Sporulation
D) Osmosis
E) Mitosis
Correct Answer: C) Sporulation
Rationale: Molds primarily replicate through the process of sporulation, which involves the
formation of spores that become airborne and spread the growth.

Question 3
Which common molds produce respirable particles, posing a greater inhalation risk?
A) Histoplasma and Cryptococcus
B) Stachybotrys and Chaetomium
C) Aspergillus and Penicillium
D) Fusarium and Alternaria
E) Cladosporium and Bipolaris
Correct Answer: C) Aspergillus and Penicillium

,Rationale: Aspergillus and Penicillium are common molds that produce smaller spores
(around 2-5 microns), which are easily respirable and can be deeply inhaled into the lungs.

Question 4
A particle that is defined as 'respirable' is one that can be deeply inhaled into the lungs, and is
generally considered to be of a size less than or equal to:
A) 1 micron
B) 5 microns
C) 10 microns
D) 20 microns
E) 50 microns
Correct Answer: B) 5 microns
Rationale: Respirable particles are those small enough to reach the lower respiratory tract,
typically defined as 5 microns or less.

Question 5
Which of the following is one of the four common viruses found in sewage?
A) Influenza
B) Measles
C) Rotavirus
D) Human Immunodeficiency Virus (HIV )
E) Herpes Simplex Virus (HSV )
Correct Answer: C) Rotavirus
Rationale: Four common viruses found in sewage include rotavirus, GI virus, adenovirus,
and hepatitis.

Question 6
Which is classified as a primary sewage biohazard?
A) Endotoxins
B) Mycotoxins
C) Mold
D) Bacteria
E) MVOCs

,Correct Answer: D) Bacteria
Rationale: Primary sewage biohazards are the live pathogens found in the sewage: viruses,
bacteria, and parasites.

Question 7
Which of the following is a secondary sewage biohazard?
A) Parasites
B) Viruses
C) Endotoxins/Exotoxins
D) Gram-negative bacteria
E) Fungi
Correct Answer: C) Endotoxins/Exotoxins
Rationale: Secondary sewage biohazards are by-products of the biological activity, such as
endotoxins/exotoxins, mycotoxins, and mold.

Question 8
Which of the following is a common gram negative bacteria found in sewage?
A) Staphylococcus aureus
B) Streptococcus pyogenes
C) E. coli
D) Bacillus cereus
E) Clostridium difficile
Correct Answer: C) E. coli
Rationale: Common gram negative bacteria found in sewage include E. coli, salmonella,
shigella, and pseudomonas.

Question 9
What is the definition of a pathogenic organism?
A) A substance that initiates inflammation.
B) An organism that resists antimicrobial agents.
C) An organism that causes disease.
D) An organism that consumes cellulose.

, E) A compound produced by mold for defense.
Correct Answer: C) An organism that causes disease.
Rationale: Pathogenic is defined as disease causing.

Question 10
What is the minimum moisture content (MC ) in a porous material that can support general mold
growth?
A) 10 %



B) 12 %



C) 16 %



D) 20 %



E) 25 %



Correct Answer: C) 16 %



Rationale: The minimum moisture content (MC) that can support mold growth is 16 %

.

Question 11
What is the minimum moisture content (MC ) that can support the growth of wood decaying
fungi?
A) 12 %



B) 16 %