NAFA CAFS TEST EXAM SCRIPT ACTUAL
QUESTIONS AND ANSWERS VERIFIED FULL
SOLUTION PACKAGE ALREADY PASSED
⩥ What are the active charged media types?
Answer: Triboelectric charging, corona charging, charging by induction
⩥ Categories of impingement filters
Answer: panel, washable, roll, and lint filters
⩥ Having larger fibers on the air entering side and smaller fibers on the
air exit side is called?
Answer: Graduating density
⩥ Baffle grease filters must meet the requirements of NFPA standard
Answer: 96
⩥ Minipleats have more media than most extended surface filters
providing two advantages - what are they
Answer: lower initial pressure drop and longer life in service
⩥ Two types of gasketing for HEPA's are?
, Answer: closed cell neoprene and non newtonian gel seal
⩥ ANSI/ASHREA 52.2 averages particles sized in how many broad
composite categories
Answer: (3) E1, E2 and E3
⩥ ANSI/ASHREA 52.2 what are the ranges of these averages
Answer: E1=.3 to 1.0 E2=1.0 to 3 E3= 3 to 10 microns
⩥ What is the name of the current European Air Filter Standard?
Answer: EN779:2002
⩥ Name two types of cleanrooms
Answer: non- unidirectional (conventional) and unindirectional (laminar
flow)
⩥ A breather filter protects content of?
Answer: storage tanks - air moving in and out of the tank
⩥ Gas turbine supply air must be free of 5 micrometer particles because?
Answer: they stick to and hurt the turbine blades - 10 micron particles
erode the blades
QUESTIONS AND ANSWERS VERIFIED FULL
SOLUTION PACKAGE ALREADY PASSED
⩥ What are the active charged media types?
Answer: Triboelectric charging, corona charging, charging by induction
⩥ Categories of impingement filters
Answer: panel, washable, roll, and lint filters
⩥ Having larger fibers on the air entering side and smaller fibers on the
air exit side is called?
Answer: Graduating density
⩥ Baffle grease filters must meet the requirements of NFPA standard
Answer: 96
⩥ Minipleats have more media than most extended surface filters
providing two advantages - what are they
Answer: lower initial pressure drop and longer life in service
⩥ Two types of gasketing for HEPA's are?
, Answer: closed cell neoprene and non newtonian gel seal
⩥ ANSI/ASHREA 52.2 averages particles sized in how many broad
composite categories
Answer: (3) E1, E2 and E3
⩥ ANSI/ASHREA 52.2 what are the ranges of these averages
Answer: E1=.3 to 1.0 E2=1.0 to 3 E3= 3 to 10 microns
⩥ What is the name of the current European Air Filter Standard?
Answer: EN779:2002
⩥ Name two types of cleanrooms
Answer: non- unidirectional (conventional) and unindirectional (laminar
flow)
⩥ A breather filter protects content of?
Answer: storage tanks - air moving in and out of the tank
⩥ Gas turbine supply air must be free of 5 micrometer particles because?
Answer: they stick to and hurt the turbine blades - 10 micron particles
erode the blades
