NAFA CAFS Exam questions and answers
with solutions
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
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
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
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
Airflow through a booth must be? - ANSWER high enough to keep the concentration of VOC
vapor below 25% of its lowest explosive limit
with solutions
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
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
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
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
Airflow through a booth must be? - ANSWER high enough to keep the concentration of VOC
vapor below 25% of its lowest explosive limit
