NAFA CAFS Test 2024 (This Quizlet is based on questions that were in the NAFA CAFS test, April 2024. The NAFA CAFS test has 70 multiple choice questions, and 30 true/false.) Graded A+

NAFA CAFS Test 2024 (This Quizlet is based on questions that were in the NAFA CAFS test, April 2024. The NAFA CAFS test has 70 multiple choice questions, and 30 true/false.) Graded A+ Aerosols cover a wide range of sizes. True or false? True. NAFA Guide to Air Filtration, 5th ed. 2014, page 1.2 A micron is approximately ___________ of an inch. 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. 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? 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? True.