NAFA CAFS /Exam QUESTIONS WITH
CORRECT ANSWERS AND 100% VERIFIED.
1 millionth of a meter call a? - CORRECT ANSWER✅✅✅Micron
A 2 stage air cleaner utilizes what 2 things? - CORRECT ANSWER✅✅✅An Ionizer section, a collector
section
A baghouse is composed of - CORRECT ANSWER✅✅✅house, hoppers, tubesheet and plenum
A breather filter protects content of? - CORRECT ANSWER✅✅✅storage tanks - air moving in and out
of the tank
A drawback of PCO may be the? - CORRECT ANSWER✅✅✅high initial cost of equipment
A major source of pollution in a building is? - CORRECT ANSWER✅✅✅people
A PCO advantage is it's? - CORRECT ANSWER✅✅✅reaction at ambient temperatures/small addition
of resistance to the HVAC system/complete destruction of a contaminant into harmless elements
A typical oil mist electrostatic presipitator has what sections (inlet to outlet) - CORRECT
ANSWER✅✅✅Baffle, ionizer, collecting, fan and optional after filter
Airflow through a booth must be? - CORRECT ANSWER✅✅✅high enough to keep the concentration
of VOC vapor below 25% of its lowest explosive limit
An electronic air cleaner collects particles by? - CORRECT ANSWER✅✅✅Electrostatically charging
them and collecting them on oppositely charges plates
, ANSI/ASHREA 52.2 averages particles sized in how many broad composite categories - CORRECT
ANSWER✅✅✅(3) E1, E2 and E3
ANSI/ASHREA 52.2 what are the ranges of these averages - CORRECT ANSWER✅✅✅E1=.3 to 1.0
E2=1.0 to 3 E3= 3 to 10 microns
Bacteria reproduce by - CORRECT ANSWER✅✅✅cell division
Baffle grease filters must meet the requirements of NFPA standard - CORRECT ANSWER✅✅✅96
Categories of impingement filters - CORRECT ANSWER✅✅✅panel, washable, roll, and lint filters
Dust separation is used for two objectives? - CORRECT ANSWER✅✅✅Recover valuable product from
plant processes that generate dust 2. Clean air to stay in compliance with OSHA and EPA requirements
Even though smaller than 0.3 microns HEPA filters can remove? - CORRECT ANSWER✅✅✅viruses
Fan efficiency, drive efficiency and motor efficiency calculate into what cost? - CORRECT
ANSWER✅✅✅energy cost
Filter efficiency is best determined by a (n) - CORRECT ANSWER✅✅✅Independant laboratory
ANSI/ASHRA 52.2 test
Gas turbine supply air must be free of 5 micrometer particles because? - CORRECT
ANSWER✅✅✅they stick to and hurt the turbine blades - 10 micron particles erode the blades
Having larger fibers on the air entering side and smaller fibers on the air exit side is called? - CORRECT
ANSWER✅✅✅Graduating density
Healthcare facilities follow filter guidelines of? - CORRECT ANSWER✅✅✅American Institute of
Architects (AIA)
CORRECT ANSWERS AND 100% VERIFIED.
1 millionth of a meter call a? - CORRECT ANSWER✅✅✅Micron
A 2 stage air cleaner utilizes what 2 things? - CORRECT ANSWER✅✅✅An Ionizer section, a collector
section
A baghouse is composed of - CORRECT ANSWER✅✅✅house, hoppers, tubesheet and plenum
A breather filter protects content of? - CORRECT ANSWER✅✅✅storage tanks - air moving in and out
of the tank
A drawback of PCO may be the? - CORRECT ANSWER✅✅✅high initial cost of equipment
A major source of pollution in a building is? - CORRECT ANSWER✅✅✅people
A PCO advantage is it's? - CORRECT ANSWER✅✅✅reaction at ambient temperatures/small addition
of resistance to the HVAC system/complete destruction of a contaminant into harmless elements
A typical oil mist electrostatic presipitator has what sections (inlet to outlet) - CORRECT
ANSWER✅✅✅Baffle, ionizer, collecting, fan and optional after filter
Airflow through a booth must be? - CORRECT ANSWER✅✅✅high enough to keep the concentration
of VOC vapor below 25% of its lowest explosive limit
An electronic air cleaner collects particles by? - CORRECT ANSWER✅✅✅Electrostatically charging
them and collecting them on oppositely charges plates
, ANSI/ASHREA 52.2 averages particles sized in how many broad composite categories - CORRECT
ANSWER✅✅✅(3) E1, E2 and E3
ANSI/ASHREA 52.2 what are the ranges of these averages - CORRECT ANSWER✅✅✅E1=.3 to 1.0
E2=1.0 to 3 E3= 3 to 10 microns
Bacteria reproduce by - CORRECT ANSWER✅✅✅cell division
Baffle grease filters must meet the requirements of NFPA standard - CORRECT ANSWER✅✅✅96
Categories of impingement filters - CORRECT ANSWER✅✅✅panel, washable, roll, and lint filters
Dust separation is used for two objectives? - CORRECT ANSWER✅✅✅Recover valuable product from
plant processes that generate dust 2. Clean air to stay in compliance with OSHA and EPA requirements
Even though smaller than 0.3 microns HEPA filters can remove? - CORRECT ANSWER✅✅✅viruses
Fan efficiency, drive efficiency and motor efficiency calculate into what cost? - CORRECT
ANSWER✅✅✅energy cost
Filter efficiency is best determined by a (n) - CORRECT ANSWER✅✅✅Independant laboratory
ANSI/ASHRA 52.2 test
Gas turbine supply air must be free of 5 micrometer particles because? - CORRECT
ANSWER✅✅✅they stick to and hurt the turbine blades - 10 micron particles erode the blades
Having larger fibers on the air entering side and smaller fibers on the air exit side is called? - CORRECT
ANSWER✅✅✅Graduating density
Healthcare facilities follow filter guidelines of? - CORRECT ANSWER✅✅✅American Institute of
Architects (AIA)
