1|Page
NAFA Certified Air Filter Specialist (CAFS)||VERIFIED
EXAM Questions with Correct Answers and
explanations LATEST THIS YEAR!!!
What is Capacity - Answer-The amount the media is
capable of removing - this determines the life of the filter
What are two types of filter options - Answer-partial
bypass, total retention
What is the ASHRAE standard 62.1/62.2 - Answer-
Ventilation for acceptable indoor air quality to specific
minimum ventilation rates IAQ which will be acceptable to
humans and are intended to avoid adverse health effects
How many classifications of air is there? - Answer-4
What are the IAQ testing applications - Answer-Particulate
contaminants, Gas phase, systems integrity, comfort
parameters
What are the control strategies - Answer-Filtration, source
removal, Dilution
,2|Page
Min demonstrated overspray filter eff must be at least -
Answer-98%
What is the min eff for a Super ULPA - Answer-99.9999%
on MPPS
What are the factors affecting ESP design and efficiency -
Answer-partical size, velocity through filter, voltage on
ionizer and collector, collector plate spacing, collector
plate loading, ionizer spacing and ozone
What are the types of Microorganisms - Answer-Virus,
Bacteria, Fungi
A baghouse is composed of - Answer-house, hoppers,
tubesheet and plenum
A typical oil mist electrostatic presipitator has what
sections (inlet to outlet) - Answer-Baffle, ionizer, collecting,
fan and optional after filter
,3|Page
PCO has how many types of reactor configurations -
Answer-4
In the filter industry, a manometer is used to measure
what? - Answer-Pressure drop across the filter
What are the 3 types of media used in contaminate control
- Answer-Active carbon, chemically treated carbon,
potassium permanganate
What is residence time? - Answer-the time it takes air to
cross a distance equal to the thickness of the filter without
accounting for the resistance of the media through which it
travels
What are the variations of the contamination control
principle - Answer-clean the air required by the process,
blanket the product with cleaned air, offer enough air flow
to move contaminated air away from the product
What is removal efficiency - Answer-The fraction of the
contaminate that once in contact with the media is
removed by either physical or chemical means
, 4|Page
Airflow through a booth must be? - Answer-high enough to
keep the concentration of VOC vapor below 25% of its
lowest explosive limit
ULPA stands for? - Answer-Ultimate low penetration Air
Filter
Name the components of a HEPA filter - Answer-Media,
separators, filter pack, sealant, framing, gasketing
What size particles behave like a gas, have negligible
settling rates and are affected by Brownian Motion -
Answer-Particals less than .1 microns
A 2 stage air cleaner utilizes what 2 things? - Answer-An
Ionizer section, a collector section
Name the types of HEPA separator styles - Answer-
'aluminum and mini pleat
Name the different HEPA frame material - Answer-Partical
board, plywood, extruded alum, formed sheet metal
NAFA Certified Air Filter Specialist (CAFS)||VERIFIED
EXAM Questions with Correct Answers and
explanations LATEST THIS YEAR!!!
What is Capacity - Answer-The amount the media is
capable of removing - this determines the life of the filter
What are two types of filter options - Answer-partial
bypass, total retention
What is the ASHRAE standard 62.1/62.2 - Answer-
Ventilation for acceptable indoor air quality to specific
minimum ventilation rates IAQ which will be acceptable to
humans and are intended to avoid adverse health effects
How many classifications of air is there? - Answer-4
What are the IAQ testing applications - Answer-Particulate
contaminants, Gas phase, systems integrity, comfort
parameters
What are the control strategies - Answer-Filtration, source
removal, Dilution
,2|Page
Min demonstrated overspray filter eff must be at least -
Answer-98%
What is the min eff for a Super ULPA - Answer-99.9999%
on MPPS
What are the factors affecting ESP design and efficiency -
Answer-partical size, velocity through filter, voltage on
ionizer and collector, collector plate spacing, collector
plate loading, ionizer spacing and ozone
What are the types of Microorganisms - Answer-Virus,
Bacteria, Fungi
A baghouse is composed of - Answer-house, hoppers,
tubesheet and plenum
A typical oil mist electrostatic presipitator has what
sections (inlet to outlet) - Answer-Baffle, ionizer, collecting,
fan and optional after filter
,3|Page
PCO has how many types of reactor configurations -
Answer-4
In the filter industry, a manometer is used to measure
what? - Answer-Pressure drop across the filter
What are the 3 types of media used in contaminate control
- Answer-Active carbon, chemically treated carbon,
potassium permanganate
What is residence time? - Answer-the time it takes air to
cross a distance equal to the thickness of the filter without
accounting for the resistance of the media through which it
travels
What are the variations of the contamination control
principle - Answer-clean the air required by the process,
blanket the product with cleaned air, offer enough air flow
to move contaminated air away from the product
What is removal efficiency - Answer-The fraction of the
contaminate that once in contact with the media is
removed by either physical or chemical means
, 4|Page
Airflow through a booth must be? - Answer-high enough to
keep the concentration of VOC vapor below 25% of its
lowest explosive limit
ULPA stands for? - Answer-Ultimate low penetration Air
Filter
Name the components of a HEPA filter - Answer-Media,
separators, filter pack, sealant, framing, gasketing
What size particles behave like a gas, have negligible
settling rates and are affected by Brownian Motion -
Answer-Particals less than .1 microns
A 2 stage air cleaner utilizes what 2 things? - Answer-An
Ionizer section, a collector section
Name the types of HEPA separator styles - Answer-
'aluminum and mini pleat
Name the different HEPA frame material - Answer-Partical
board, plywood, extruded alum, formed sheet metal
