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NAFA CAFS /Exam test revised version /newest, Exams of Advanced Education

Cheyney University of PennsylvaniaAdvanced Education

NAFA CAFS /Exam test revised version /newest

Typology: Exams

2025/2026

Available from 06/16/2026

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NAFA CAFS /Exam test revised version /newest
1. What are the 3 types of media used in contaminate control: Active
carbon, chemically
treated carbon, potassium permanganate
2.
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
3. What are the variations of the contamination control principle:
clean
the air
required
by
the
process,
blanket
the
product
with
cleaned
air,
otter
enough
air
flow
to
move
contaminated
air
away
from the product
4.
What
is
removal
efficiency:
The
fraction
of
the
contaminate
that
once
in
contact
with
the
media
is
removed
by
either
physical
or
chemical
means
5.
What
is
Capacity:
The amount the media is capable of removing - this determines the life of
the filter
6.
What
are
two
types
of
filter
options:
partial bypass, total
retention
7.
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
ettects
8.
How many classifications of air is there?: 4
9.
What
are
the
IAQ
testing
applications:
Particulate contaminants, Gas phase,
systems integrity,
comfort parameters
10.
What
are
the
control
strategies:
Filtration, source removal, Dilution
11. Min demonstrated overspray filter eff must be at least: 98%
12. What is the min eff for a Super ULPA: 99.9999% on MPPS
13.
What are the factors affecting ESP design and efficiency:
partical
size, velocity through
filter,
voltage
on
ionizer
and
collector,
collector
plate
spacing,
collector
plate
loading,
ionizer
spacing
and
ozone
14. What are the types of Microorganisms: Virus, Bacteria, Fungi
15.
A
baghouse
is
composed
of:
house, hoppers, tubesheet and plenum
16. A typical oil mist electrostatic presipitator has what sections
pf3
pf4
pf5
pf8

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NAFA CAFS /Exam test revised version /newest

  1. What are the 3 types of media used in contaminate control: Active carbon, chemically treated carbon, potassium permanganate
  2. 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
  3. What are the variations of the contamination control principle: clean the air required by the process, blanket the product with cleaned air, otter enough air flow to move contaminated air away from the product
  4. What is removal efficiency: The fraction of the contaminate that once in contact with the media is removed by either physical or chemical means
  5. What is Capacity: The amount the media is capable of removing - this determines the life of the filter
  6. What are two types of filter options: partial bypass, total retention
  7. 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 ettects
  8. How many classifications of air is there?: 4
  9. What are the IAQ testing applications: Particulate contaminants, Gas phase, systems integrity, comfort parameters
  10. What are the control strategies: Filtration, source removal, Dilution
  11. Min demonstrated overspray filter eff must be at least: 98%
  12. What is the min eff for a Super ULPA: 99.9999% on MPPS
  13. What are the factors affecting ESP design and efficiency: partical size, velocity through filter, voltage on ionizer and collector, collector plate spacing, collector plate loading, ionizer spacing and ozone
  14. What are the types of Microorganisms: Virus, Bacteria, Fungi
  15. A baghouse is composed of: house, hoppers, tubesheet and plenum
  16. A typical oil mist electrostatic presipitator has what sections

2 / (inlet to outlet)- : Baffle, ionizer, collecting, fan and optional after filter

  1. PCO has how many types of reactor configurations: 4
  2. In the filter industry, a manometer is used to measure what?: Pressure drop across the filter
  3. Airflow through a booth must be?: high enough to keep the concentration of VOC vapor below 25% of its lowest explosive limit
  4. ULPA stands for?: Ultimate low penetration Air Filter
  5. Name the components of a HEPA filter: Media, separators, filter pack, sealant, framing, gasketing
  6. What size particles behave like a gas, have negligible settling rates and are affected by Brownian Motion: Particals less than .1 microns
  7. A 2 stage air cleaner utilizes what 2 things?: An Ionizer section, a collector section
  8. Name the types of HEPA separator styles: 'aluminum and mini pleat
  9. Name the different HEPA frame material: Partical board, plywood, extruded alum, formed sheet metal
  10. What is media velocity: the speed of the air as it moves through the filter media
  11. What are the types of HEPA filter sealants: Rubber bases, urethane, epoxy, hot melt, silicone
  12. What are the styles of Dust Separation equipment: cyclone, shaker, reverse pulse, jet pulse
  13. What are the different types of air cleaners: media, electronic, agglomorators
  14. what is the minimum efficiency for ULPA: 99.999% on .1 to. microns
  15. What are the two types of cleanroom filters: roomoside replaceable ceiling module, fan powered module
  16. Removal of dust on an elctronic air cleaner is done how: washed ott, if it has agglomerated it can be blown ott
  17. Lofted glass media can be found most often in what style filter: Pocket or rigid
  18. What is final resistance: pressure at which the filter would be considered fully

4 / test to measure merv, the test aerosol is Potassium Chloride .3 to 10 micron, dust loading aerosol to final pressure drop is the Ashrae standard dust test

  1. What is initial resistance: Pressure required to move air through the filter at a certain air flow it written in inches, water or pascals
  2. HEPA filter testing consists of?: Penetration converted to overall eflciency including gaskets, sealing and framing, initial resistance and 2 flow testing (leak test)
  3. What are the three ways to control molecular contaminants?: Source control, ventilation/dilution, removal control
  4. What is straining?: occurs when the smallest dimension of dust particle is greater than the distance between adjoining media fibers
  5. What 3 factors affect mechanical filter selection?: eflciency, pressure drop, capacity
  6. What are the active charged media types?: Triboelectric charging, corona charging, charging by induction
  7. Categories of impingement filters: panel, washable, roll, and lint filters
  8. Having larger fibers on the air entering side and smaller fibers on the air exit side is called?: Graduating density
  9. Baffle grease filters must meet the requirements of NFPA standard: 96
  10. Minipleats have more media than most extended surface filters providing two advantages - what are they: lower initial pressure drop and longer life in service
  11. Two types of gasketing for HEPA's are?: closed cell neoprene and non newtonian gel seal
  12. ANSI/ASHREA 52.2 averages particles sized in how many broad composite categories: (3) E1, E2 and E
  13. ANSI/ASHREA 52.2 what are the ranges of these averages: E1=. to 1.0 E2=1.0 to 3 E3= 3 to 10 microns
  14. What is the name of the current European Air Filter Standard?: EN779:
  15. Name two types of cleanrooms: non- unidirectional (conventional) and unindirectional (laminar flow)
  16. A breather filter protects content of?: storage tanks - air moving in and out

5 / of the tank

  1. Gas turbine supply air must be free of 5 micrometer particles because?: they stick to and hurt the turbine blades - 10 micron particles erode the blades
  2. Two main methods for molecular contaminant removal are?: Absorption and Chemisorption
  3. Particles bypass cells allow for retrofit without?: large pressure increases in the system
  4. Name the three procedures for engineers to use in ASHRAE standard 62.1- : Ventilation rate, indoor air quality, natural ventilation procedure
  5. Impingement filters are characterized by?: Relatively high velocities and low pressure drop
  6. The four principles of air filtration are?: Impingement, interception, dittusion, and straining
  7. The velocity of the air through any one square foot of media in an extended surface filter is called?: Media velocity
  8. What percent of the total cost of a filter is energy cost?: 81%
  9. UVGI is most effective on micro organism in what range of the light spec-trum: 200 to 280 nanometers
  10. What are vapors?: Gases formed by evaporation of materials that are normally a liquid or solid
  11. What are the principles of air flow?: Quantity of Air(Q) the velocity of air (V)and the area of the filter (A)
  12. What is pressure drop?: the resistance a filter adds to the system
  13. What are the principles of Particulate Air Filtration: Mechanical, electrostatically charged media, electronic air cleaners
  14. What is Diffusion?: explains the capture of very small particles (Brownian Motion - the erratic path taken by very small particles because they are bombarded by other particles) This erratic path ncreases the probability that the particles will come into contact with the fibers
  15. Dust separation is used for two objectives?: Recover valuable product from plant processes that generate dust 2. Clean air to stay in compliance with OSHA and EPA requirements
  16. What is Aerosol?: An assemblage of small particles, solid or liquid suspended in air
  17. What is Absorption?: the process by which a liquid or a gas is taken into the

7 / Engineers

  1. What is MERV: Minimum Eflciency Rating Value
  2. When exhaust air exceeds intake air must be provided to replace the difference: Make up air
  3. A drawback of PCO may be the?: high initial cost of equipment
  4. what should technicians do before servicing units in which UV lights have been installed?: Turn ott the lights prior to opening compartments where the lights are located
  5. Why should UVGI lights be installed downstream of filters?: UV light can destroy certain types of filter media
  6. Running filters to their maximum pressure drop may?: cost more in energy than the cost to change it sooner
  7. Fan efficiency, drive efficiency and motor efficiency calculate into what cost?: energy cost
  8. A major source of pollution in a building is?: people
  9. Tuberculosis patients must be kept in rooms that are?: Negative pressure to the other rooms
  10. Testing HEPA filters after installation is called?: In-place leak testing or cold DOP test
  11. If static pressure goes up, velocity pressure goes?: Down
  12. Metal working fluids are used to?: cool, lubricate and clean production parts
  13. What are the two general categories of Enclosed Finish Booths?: cross draft and down draft
  14. Name for issue when a person comes into a building and experiences flu-like symptoms?: sick building syndrome
  15. Healthcare facilities follow filter guidelines of?: American Institute of Architects (AIA)
  16. Bacteria reproduce by: cell division
  17. Even though smaller than 0.3 microns HEPA filters can remove?: viruses
  18. Filter efficiency is best determined by a (n): Independant laboratory ANSI/ASHRA 52.2 test

8 /

  1. An electronic air cleaner collects particles by?: Electrostatically charging them and collecting them on oppositely charges plates
  2. 1 millionth of a meter call a?: Micron
  3. The air we breath is composed mainly of?: Nitrogen
  4. The size of the particles in outdoor air are mainly what size?: 1 micrometer
  5. Rated flow of air through a filter at specifies pressure drop is called its?: - Capacity