BOMI: AIR HANDLING, WATER TREATMENT & PLUMBING
SYSTEMS STUDY GUIDE NEWEST ACTYUAL 2025/2026 WITH
COMPLETE 450 QUESTIONS AND ANSWERSVERIFIED/
GRADED A+
10 - All of the following are examples of air contaminants
except: - ----Answers---Oxygen
Examples of air contaminants:
- Partials
- Mold
- Formaldehyde
11 - Why are open-filter media and filters placed so they are
perpendicular to the main airflow direction? - ----Answers---
To ensure the velocity through the filter media is equal to the
dust velocity
12 - Which type of fibrous air filters use compressible panel-
type glass or polymer fiber? - ----Answers---Roll filters
13 - Which type of membrane air filter has a relatively open,
sponge-like structure that acts like a support for a very thin
face layer containing ultra fine pores? - ----Answers---
Granular asymmetric membrane filters
,14 - What percentage of the fine dust, smoke, and fumes from
the air within overall pressure drop of no more than 3 mm can
an electrostatic precipitator filter? - ----Answers---90 %
Key Concept Chapter 5 - ----Answers---
1 - What are the three main elements of good IAQ - ----
Answers---Acceptable temperature and RH
Controlled airborne contaminants
Adequate distribution of ventilation air
2 - What is the best type of environment for biological
contaminants to thrive? - ----Answers---Biological
contaminants thrive in areas that are dark, moist, and laden
with nutrients.
3 - What is the best way to control IAQ - ----Answers---By
diluting polluted indoor air with less contaminated outside
fresh air.
4 - What determines the ventilation requirements? - ----
Answers---ASHRAE Standards have established guidelines
for determining ventilation rate and procedures to assure air
quality.
,5 - What are three basic types of air contaminants that need to
be removed? - ----Answers---Solid and liquid particles
Gases and Vapors
Microbiological contaminants
6 - How are nicotine and formaldehyde classified? - ----
Answers---Classified as a gas or vapor
7 - Define bioaerosols - ----Answers---A microbiological
contaminant. It is also referred to as bioaerosols.
Mold, fungus, bacteria, feces, body parts, etc.
8 - What is a viscous impingement filter? - ----Answers---
Traps dust particles in a viscous film.
9 - Describe panel filters? - ----Answers---Panel filters have
open filter media with low airflow resistance. The media are
held in thin panes, and filters are placed so they are
perpendicular to the main airflow direction. This ensures the
velocity through the filter media is equal to the duct velocity.
10 - What type of filter can be compared to that of film in a
camera? - ----Answers---Roll filters
, 11 - What are four varieties of membrane air filters? - ----
Answers---Granular Symmetric Membrane Filters
Granular Asymmetric Membrane Filters
Collimated Pore Membranes
Fiber Membrane Filters
12 - What is the purpose of an electrostatic precipitator? - ----
Answers---Electrostatic Precipitators use electricity to
remove dust, smoke and fumes from the air.
13 - How effective are electrostatic precipitators? - ----
Answers---Electrostatic Precipitators Can filter about 90% of
the fine dust, smoke, and fumes from the air within overall
pressure drop of no more than 3mm.
14 - What is the danger of operating electrostatic filters? - ----
Answers---They can use AC or DC at levels that can be lethal.
15 - Which type of filters is effective for removing both solid
particles and odor-causing gases and bacteria? - ----
Answers---Activated charcoal filters
16 - What is a common method for detecting the existence of
microbiological contaminants? - ----Answers---Air sampling.
SYSTEMS STUDY GUIDE NEWEST ACTYUAL 2025/2026 WITH
COMPLETE 450 QUESTIONS AND ANSWERSVERIFIED/
GRADED A+
10 - All of the following are examples of air contaminants
except: - ----Answers---Oxygen
Examples of air contaminants:
- Partials
- Mold
- Formaldehyde
11 - Why are open-filter media and filters placed so they are
perpendicular to the main airflow direction? - ----Answers---
To ensure the velocity through the filter media is equal to the
dust velocity
12 - Which type of fibrous air filters use compressible panel-
type glass or polymer fiber? - ----Answers---Roll filters
13 - Which type of membrane air filter has a relatively open,
sponge-like structure that acts like a support for a very thin
face layer containing ultra fine pores? - ----Answers---
Granular asymmetric membrane filters
,14 - What percentage of the fine dust, smoke, and fumes from
the air within overall pressure drop of no more than 3 mm can
an electrostatic precipitator filter? - ----Answers---90 %
Key Concept Chapter 5 - ----Answers---
1 - What are the three main elements of good IAQ - ----
Answers---Acceptable temperature and RH
Controlled airborne contaminants
Adequate distribution of ventilation air
2 - What is the best type of environment for biological
contaminants to thrive? - ----Answers---Biological
contaminants thrive in areas that are dark, moist, and laden
with nutrients.
3 - What is the best way to control IAQ - ----Answers---By
diluting polluted indoor air with less contaminated outside
fresh air.
4 - What determines the ventilation requirements? - ----
Answers---ASHRAE Standards have established guidelines
for determining ventilation rate and procedures to assure air
quality.
,5 - What are three basic types of air contaminants that need to
be removed? - ----Answers---Solid and liquid particles
Gases and Vapors
Microbiological contaminants
6 - How are nicotine and formaldehyde classified? - ----
Answers---Classified as a gas or vapor
7 - Define bioaerosols - ----Answers---A microbiological
contaminant. It is also referred to as bioaerosols.
Mold, fungus, bacteria, feces, body parts, etc.
8 - What is a viscous impingement filter? - ----Answers---
Traps dust particles in a viscous film.
9 - Describe panel filters? - ----Answers---Panel filters have
open filter media with low airflow resistance. The media are
held in thin panes, and filters are placed so they are
perpendicular to the main airflow direction. This ensures the
velocity through the filter media is equal to the duct velocity.
10 - What type of filter can be compared to that of film in a
camera? - ----Answers---Roll filters
, 11 - What are four varieties of membrane air filters? - ----
Answers---Granular Symmetric Membrane Filters
Granular Asymmetric Membrane Filters
Collimated Pore Membranes
Fiber Membrane Filters
12 - What is the purpose of an electrostatic precipitator? - ----
Answers---Electrostatic Precipitators use electricity to
remove dust, smoke and fumes from the air.
13 - How effective are electrostatic precipitators? - ----
Answers---Electrostatic Precipitators Can filter about 90% of
the fine dust, smoke, and fumes from the air within overall
pressure drop of no more than 3mm.
14 - What is the danger of operating electrostatic filters? - ----
Answers---They can use AC or DC at levels that can be lethal.
15 - Which type of filters is effective for removing both solid
particles and odor-causing gases and bacteria? - ----
Answers---Activated charcoal filters
16 - What is a common method for detecting the existence of
microbiological contaminants? - ----Answers---Air sampling.
