1|Page
NAFA Certified Air Filter Specialist (CAFS) || Verified
Exam Study Set, 2026/2027 -Question Air Filtration
Certification Examination with Verified Rationales
NAFA CAFS Test Exam Coverage
The exam coverage includes fleet management principles
and administrative knowledge assessed in the NAFA
CAFS Test Exam. It focuses on core fleet operations such
as vehicle acquisition, maintenance management, fuel
management, lifecycle costing, asset utilization, and fleet
safety. The exam also evaluates understanding of
budgeting, policy development, risk management,
regulatory compliance, sustainability, and performance
measurement in fleet administration. Emphasis is placed
on efficient fleet operations, cost control, strategic
planning, and applying best practices in professional fleet
supervision and management
,2|Page
A micron is approximately ___________ of an inch. -
Answer-1/25,400".
NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2
Aerosols cover a wide range of sizes. True or false? -
Answer-True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2
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
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.
,3|Page
V(fpm)=Q(cfm)/A(Sq. ft. of media)
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.1
Electronic Air Cleaners are externally powered devices.
True or false? - Answer-True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.3
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
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.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.5
, 4|Page
A dipole moment is when there is a ________
_____________ of electrons at ____ _______ of a
molecule than there is at ____________. - Answer-
Greater concentration.
One end.
Another.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.6
The strongest force occurs between particles and fibers
that are ___________ ____ _____ ________. - Answer-
Approximately the same diameter.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.6
What is capacity? - Answer-The amount of air that a filter
can handle. (cfm)
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.7
NAFA Certified Air Filter Specialist (CAFS) || Verified
Exam Study Set, 2026/2027 -Question Air Filtration
Certification Examination with Verified Rationales
NAFA CAFS Test Exam Coverage
The exam coverage includes fleet management principles
and administrative knowledge assessed in the NAFA
CAFS Test Exam. It focuses on core fleet operations such
as vehicle acquisition, maintenance management, fuel
management, lifecycle costing, asset utilization, and fleet
safety. The exam also evaluates understanding of
budgeting, policy development, risk management,
regulatory compliance, sustainability, and performance
measurement in fleet administration. Emphasis is placed
on efficient fleet operations, cost control, strategic
planning, and applying best practices in professional fleet
supervision and management
,2|Page
A micron is approximately ___________ of an inch. -
Answer-1/25,400".
NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2
Aerosols cover a wide range of sizes. True or false? -
Answer-True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2
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
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.
,3|Page
V(fpm)=Q(cfm)/A(Sq. ft. of media)
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.1
Electronic Air Cleaners are externally powered devices.
True or false? - Answer-True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.3
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
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.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.5
, 4|Page
A dipole moment is when there is a ________
_____________ of electrons at ____ _______ of a
molecule than there is at ____________. - Answer-
Greater concentration.
One end.
Another.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.6
The strongest force occurs between particles and fibers
that are ___________ ____ _____ ________. - Answer-
Approximately the same diameter.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.6
What is capacity? - Answer-The amount of air that a filter
can handle. (cfm)
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.7
