NAFA CAFS Test 2025/2026 Exam Excellence Guide: Questions, Answers & Proven Methods

NAFA CAFS Test 2025/2026

The ANSI/ASHREA Standard 52.2 filter test method does not

provide for the testing of electronic air cleaners because... -

Correct Answer ✔ ✔ The synthetic test dust contains

carbon black and tends to short out the electric connections

and renders the unit inoperable.




NAFA Guide to Air Filtration, 5th ed. 2014, page 6.4

Factors affecting electronic air cleaners design and efficiency

are:


1.)

2.)

,3.)


4.)

5.)


6.)


7.) - Correct Answer ✔ ✔ 1.) Particle size


2.) Velocity through the filter

3.) Voltage on the ionizer and collector


4.) Collector plate spacing

5.) Collector plate loading


6.) Ionizer spacing

7.) Ozone

, NAFA Guide to Air Filtration, 5th ed. 2014, page 6.4


An agglomerator must always be used with after filters. True

or false? - Correct Answer ✔ ✔ True.




NAFA Guide to Air Filtration, 5th ed. 2014, page 6.5

An _____________ ___ classified filter is a filter that, when

clean, will burn moderately when attacked by flame or emit

moderate amounts of smoke, or both. - Correct Answer ✔

✔ ANSI/UL 900




NAFA Guide to Air Filtration, 5th ed. 2014, page 7.8