NAFA CAFS /Exam Test 2025 Questions And Answers Correct/verified
Graded A+
1. What are the 3 types of media used in contami- Active carbon, chemically treat-
nate control ed carbon, potassium perman-
ganate
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 con- clean the air required by the
trol principle process, blanket the product with
cleaned air, offer 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 me-
dia 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
effects
, NAFA CAFS /Exam
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, Dilu-
tion
11. Min demonstrated overspray filter eff must be at 98%
least
12. What is the min eff for a Super ULPA 99.9999% on MPPS
13. What are the factors affecting ESP design and partical size, velocity through fil-
efficiency ter, voltage on ionizer and collec-
tor, collector plate spacing, col-
lector plate loading, ionizer spac-
ing 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 Baffle, ionizer, collecting, fan and
what sections (inlet to outlet) optional after filter
17. PCO has how many types of reactor configura- 4
tions
18. In the filter industry, a manometer is used to mea- Pressure drop across the filter
sure what?
Graded A+
1. What are the 3 types of media used in contami- Active carbon, chemically treat-
nate control ed carbon, potassium perman-
ganate
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 con- clean the air required by the
trol principle process, blanket the product with
cleaned air, offer 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 me-
dia 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
effects
, NAFA CAFS /Exam
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, Dilu-
tion
11. Min demonstrated overspray filter eff must be at 98%
least
12. What is the min eff for a Super ULPA 99.9999% on MPPS
13. What are the factors affecting ESP design and partical size, velocity through fil-
efficiency ter, voltage on ionizer and collec-
tor, collector plate spacing, col-
lector plate loading, ionizer spac-
ing 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 Baffle, ionizer, collecting, fan and
what sections (inlet to outlet) optional after filter
17. PCO has how many types of reactor configura- 4
tions
18. In the filter industry, a manometer is used to mea- Pressure drop across the filter
sure what?
