NAFA CAFS EXAM QUESTIONS AND
ANSWERS 2026 VERIFIED.
What are the 3 types of media used in contaminate control - ANS Active carbon, chemically
treated carbon, potassium permanganate
What is residence time? - ANS 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 - ANS 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 - ANS The fraction of the contaminate that once in contact with
the media is removed by either physical or chemical means
What is Capacity - ANS The amount the media is capable of removing - this determines the
life of the filter
What are two types of filter options - ANS partial bypass, total retention
What is the ASHRAE standard 62.1/62.2 - ANS 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
@2026/2027 ALLRIGHTS RESERVED.
, How many classifications of air is there? - ANS 4
What are the IAQ testing applications - ANS Particulate contaminants, Gas phase, systems
integrity, comfort parameters
What are the control strategies - ANS Filtration, source removal, Dilution
Min demonstrated overspray filter eff must be at least - ANS 98%
What is the min eff for a Super ULPA - ANS 99.9999% on MPPS
What are the factors affecting ESP design and efficiency - ANS 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 - ANS Virus, Bacteria, Fungi
A baghouse is composed of - ANS house, hoppers, tubesheet and plenum
A typical oil mist electrostatic presipitator has what sections (inlet to outlet) - ANS Baffle,
ionizer, collecting, fan and optional after filter
PCO has how many types of reactor configurations - ANS 4
In the filter industry, a manometer is used to measure what? - ANS Pressure drop across the
filter
Airflow through a booth must be? - ANS high enough to keep the concentration of VOC vapor
below 25% of its lowest explosive limit
@2026/2027 ALLRIGHTS RESERVED.
ANSWERS 2026 VERIFIED.
What are the 3 types of media used in contaminate control - ANS Active carbon, chemically
treated carbon, potassium permanganate
What is residence time? - ANS 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 - ANS 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 - ANS The fraction of the contaminate that once in contact with
the media is removed by either physical or chemical means
What is Capacity - ANS The amount the media is capable of removing - this determines the
life of the filter
What are two types of filter options - ANS partial bypass, total retention
What is the ASHRAE standard 62.1/62.2 - ANS 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
@2026/2027 ALLRIGHTS RESERVED.
, How many classifications of air is there? - ANS 4
What are the IAQ testing applications - ANS Particulate contaminants, Gas phase, systems
integrity, comfort parameters
What are the control strategies - ANS Filtration, source removal, Dilution
Min demonstrated overspray filter eff must be at least - ANS 98%
What is the min eff for a Super ULPA - ANS 99.9999% on MPPS
What are the factors affecting ESP design and efficiency - ANS 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 - ANS Virus, Bacteria, Fungi
A baghouse is composed of - ANS house, hoppers, tubesheet and plenum
A typical oil mist electrostatic presipitator has what sections (inlet to outlet) - ANS Baffle,
ionizer, collecting, fan and optional after filter
PCO has how many types of reactor configurations - ANS 4
In the filter industry, a manometer is used to measure what? - ANS Pressure drop across the
filter
Airflow through a booth must be? - ANS high enough to keep the concentration of VOC vapor
below 25% of its lowest explosive limit
@2026/2027 ALLRIGHTS RESERVED.
