NAFA CAFS ACTUAL PRACTICE SOLUTION 2026 QUESTIONS WITH ANSWERS GRADED A+

NAFA CAFS ACTUAL PRACTICE SOLUTION
2026 QUESTIONS WITH ANSWERS GRADED
A+

⩥ The air we breath is composed mainly of ______? Answer: Nitrogen


⩥ The size of particles in outdoor air are mainly _____ and smaller
Answer: 1 micrometer


⩥ ___________ (size) particles behave like a gas, have negligible
settling rates, and are affected by Brownian Motion. Answer: Particles
less than 0.1 micrometers


⩥ Rated flow of air through a filter at specified pressure drop is called
_____? Answer: Capacity


⩥ The four principles of air filtration are? Answer: 1. Impingement
2. Interception
3. Diffusion
4. Straining


⩥ If Static Pressure goes up, Velocity Pressure goes _______? Answer:
Down (SP + VP = TP)

, ⩥ In the filter industry, a manometer is used to measure? Answer:
Pressure drop across a filter


⩥ An Electronic Air Cleaner collects particles by? Answer:
Electrostatically charging them and collecting them on oppositely
charged plates.


⩥ What is the formula for expressing air flow through a duct? Answer:
Q=A*V
Quantity = Area of the Duct * Velocity of Air


⩥ _____________ is the pressure within the duct that is capable of
bursting the duct and may be positive or negative. Answer: Static
Pressure


⩥ Velocity Pressure must always be ______? Answer: Positive


⩥ The sum of the static pressure and velocity pressure is? Answer: Total
pressure


⩥ What is the primary difference between mechanical and electrostatic
filter medias? Answer: Mechanical media does not rely on electrostatic
charge for efficiencies.