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NAFA CAFS Test 2024 updated already passed
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NAFA CAFS Test 2024 updated already passed
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NAFA CAFS Test 2024 updated alreadypassed
Aerosols cover a wide range of sizes. True or false? - correct answer ✔✔True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2
A micron is approximately ___________ of an inch. - correct answer ✔✔1/25,400".
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. - correct 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? - correct answer ✔✔41.66fpm.
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? - correct 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. - correct 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? - correct answer ✔✔True.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.5
A dipole moment is when there is a ________ _____________ of electrons at ____ _______ or _____ of
a molecule than there is at ____________. - correct answer ✔✔Greater concentration.
One point or end.
Another.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.6
The strongest force occurs between particles and fibers that are ___________ ____ _____ ________. -
correct answer ✔✔Approximately the same diameter.
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.6
What is capacity? - correct answer ✔✔The amount of air that a filter can handle. (cfm)
NAFA Guide to Air Filtration, 5th ed. 2014, page 2.7
What is dust holding capacity? - correct 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
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