NAFA Certified Air Filter Specialist (CAFS)
Exam Questions And Detailed Solutions
Latest Update
What are the 3 types of media used in contaminate control
Active carbon, chemically treated carbon, potassium permanganate
What is residence time?
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
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
The fraction of the contaminate that once in contact with the media is removed
by either physical or chemical means
,What is Capacity
The amount the media is capable of removing - this determines the life of the
filter
What are two types of filter options
partial bypass, total retention
What is the ASHRAE standard 62.1/62.2
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?
4
What are the IAQ testing applications
Particulate contaminants, Gas phase, systems integrity, comfort parameters
What are the control strategies
Filtration, source removal, Dilution
Min demonstrated overspray filter eff must be at least
, 98%
What is the min eff for a Super ULPA
99.9999% on MPPS
What are the factors affecting ESP design and efficiency
particle 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
Virus, Bacteria, Fungi
A baghouse is composed of
house, hoppers, tubesheet and plenum
A typical oil mist electrostatic precipitator has what sections (inlet to outlet)
Baffle, ionizer, collecting, fan and optional after filter
Exam Questions And Detailed Solutions
Latest Update
What are the 3 types of media used in contaminate control
Active carbon, chemically treated carbon, potassium permanganate
What is residence time?
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
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
The fraction of the contaminate that once in contact with the media is removed
by either physical or chemical means
,What is Capacity
The amount the media is capable of removing - this determines the life of the
filter
What are two types of filter options
partial bypass, total retention
What is the ASHRAE standard 62.1/62.2
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?
4
What are the IAQ testing applications
Particulate contaminants, Gas phase, systems integrity, comfort parameters
What are the control strategies
Filtration, source removal, Dilution
Min demonstrated overspray filter eff must be at least
, 98%
What is the min eff for a Super ULPA
99.9999% on MPPS
What are the factors affecting ESP design and efficiency
particle 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
Virus, Bacteria, Fungi
A baghouse is composed of
house, hoppers, tubesheet and plenum
A typical oil mist electrostatic precipitator has what sections (inlet to outlet)
Baffle, ionizer, collecting, fan and optional after filter
