NAFA CAFS TeST LATeST UPDATeD
2025/2026 WITH COMPLeTe
COMPReHeNSIVe QUeSTIONS AND SURe
VeRIFIeD SOLUTIONS 100% (THIS QUIzLeT
IS bASeD ON QUeSTIONS THAT WeRe IN
THe NAFA CAFS TeST, APRIL 2024. THe
NAFA CAFS TeST HAS 70 MULTIPLe
CHOICe QUeSTIONS, AND 30
TRUe/FALSe.) GRADeD AT A+ SCORe
(MOST FReQUeNTLY TeSTeD) SURe
GUARANTeeD PASS!!
1. Aerosols cover a wide range of sizes. True or false? - ANSWER
✔True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2
2. What is dust holding capacity? - ANSWER ✔The amount of dust
retained by a filter to its final recommended pressure drop.
, NAFA Guide to Air Filtration, 5th ed. 2014, page 17.5
3. A panel filter has a media velocity that is lower than it's face
velocity. True or false? - ANSWER ✔False. A panel filter has the
same media velocity as face velocity.
NAFA Guide to Air Filtration, 5th ed. 2014, page 3.1
4. Airborne particles are attracted to fibers that have a charge
opposite of their own. This attraction is diminished when the air is
_______, and as particles build up on the fibers. - ANSWER
✔Humid.
NAFA Guide to Air Filtration, 5th ed. 2014, page 3.3
5. A micron is approximately ___________ of an inch. - ANSWER
✔1/25,400".
NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2
6. Particle counters used to use tungsten light, and were limited to
measuring particle sizes down to 0.3 microns. Newer units, using
___________ as a source of light, have the capability of counting
particles smaller than 0.1 micron. - ANSWER ✔Lasers.
, NAFA Guide to Air Filtration, 5th ed. 2014, page 1.5
7. If you have a 20x24x12 filter, with 48sq. ft. of media, placed in an
airstream of 2000cfm, what would your velocity(fpm) be? -
ANSWER ✔41.66fpm.
V(fpm)=Q(cfm)/A(Sq. ft. of media)
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.1
8. Electronic Air Cleaners are externally powered devices. True or
false? - ANSWER ✔True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.3
9. The thicker the filter media and the closer the orientation of fibers,
the ________ the possibility of collision by a fiber. - ANSWER
✔Greater.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.4
10. Impingement filters are frequently treated with adhesives that
coat the fibers and create a bond between the particle and the fiber.
True or false? - ANSWER ✔True.
2025/2026 WITH COMPLeTe
COMPReHeNSIVe QUeSTIONS AND SURe
VeRIFIeD SOLUTIONS 100% (THIS QUIzLeT
IS bASeD ON QUeSTIONS THAT WeRe IN
THe NAFA CAFS TeST, APRIL 2024. THe
NAFA CAFS TeST HAS 70 MULTIPLe
CHOICe QUeSTIONS, AND 30
TRUe/FALSe.) GRADeD AT A+ SCORe
(MOST FReQUeNTLY TeSTeD) SURe
GUARANTeeD PASS!!
1. Aerosols cover a wide range of sizes. True or false? - ANSWER
✔True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2
2. What is dust holding capacity? - ANSWER ✔The amount of dust
retained by a filter to its final recommended pressure drop.
, NAFA Guide to Air Filtration, 5th ed. 2014, page 17.5
3. A panel filter has a media velocity that is lower than it's face
velocity. True or false? - ANSWER ✔False. A panel filter has the
same media velocity as face velocity.
NAFA Guide to Air Filtration, 5th ed. 2014, page 3.1
4. Airborne particles are attracted to fibers that have a charge
opposite of their own. This attraction is diminished when the air is
_______, and as particles build up on the fibers. - ANSWER
✔Humid.
NAFA Guide to Air Filtration, 5th ed. 2014, page 3.3
5. A micron is approximately ___________ of an inch. - ANSWER
✔1/25,400".
NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2
6. Particle counters used to use tungsten light, and were limited to
measuring particle sizes down to 0.3 microns. Newer units, using
___________ as a source of light, have the capability of counting
particles smaller than 0.1 micron. - ANSWER ✔Lasers.
, NAFA Guide to Air Filtration, 5th ed. 2014, page 1.5
7. If you have a 20x24x12 filter, with 48sq. ft. of media, placed in an
airstream of 2000cfm, what would your velocity(fpm) be? -
ANSWER ✔41.66fpm.
V(fpm)=Q(cfm)/A(Sq. ft. of media)
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.1
8. Electronic Air Cleaners are externally powered devices. True or
false? - ANSWER ✔True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.3
9. The thicker the filter media and the closer the orientation of fibers,
the ________ the possibility of collision by a fiber. - ANSWER
✔Greater.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.4
10. Impingement filters are frequently treated with adhesives that
coat the fibers and create a bond between the particle and the fiber.
True or false? - ANSWER ✔True.
