NAFA CAFS Exam Questions And
Answers | 2025 Updated Solutions |
100% Correct Answers
What are the types of Microorganisms - CORRECT ANSWER-
• Virus,
• Bacteria,
• Fungi
A baghouse is composed of - CORRECT ANSWER-
• house,
• hoppers,
• tubesheet
• plenum
A typical oil mist electrostatic presipitator has what sections (inlet to outlet) - CORRECT
ANSWER-
• Baffle,
• ionizer,
• collecting,
• fan
• optional after filter
What is Capacity - CORRECT ANSWER-The amount the media is capable of removing
- this determines the life of the filter
What are two types of filter options - CORRECT ANSWER-partial bypass, total retention
What is the ASHRAE standard 62.1/62.2 - CORRECT ANSWER-Ventilation for
acceptable indoor air quality to specific minimum ventilation rates IAQ which will be
acceptable to humans and are intended to avoid adverse health effects
How many classifications of air is there? - CORRECT ANSWER-4
What are the IAQ testing applications - CORRECT ANSWER-Particulate contaminants,
Gas phase, systems integrity, comfort parameters
What are the control strategies - CORRECT ANSWER-
• Filtration
• source removal
, • Dilution
Min demonstrated overspray filter eff must be at least - CORRECT ANSWER-98%
What is the min eff for a Super ULPA - CORRECT ANSWER-99.9999% on MPPS
What are the factors affecting ESP design and efficiency - CORRECT ANSWER-
• partical size
• velocity through filter
• voltage on ionizer and collector
• collector plate spacing,
• collector plate loading,
• ionizer spacing and ozone
PCO has how many types of reactor configurations - CORRECT ANSWER-4
In the filter industry, a manometer is used to measure what? - CORRECT ANSWER-
Pressure drop across the 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
ULPA stands for? - CORRECT ANSWER-Ultimate low penetration Air Filter
What are the 3 types of media used in contaminate control - CORRECT ANSWER-
• Active carbon
• chemically treated carbon
• potassium permanganate
What is residence time? - CORRECT ANSWER-the time it takes air to cross a distance
equal to the thickness of the filter without accounting for the resistance of the media
through which it travels
What are the variations of the contamination control principle - CORRECT ANSWER-
clean the air required by the process, blanket the product with cleaned air, offer enough
air flow to move contaminated air away from the product
What is removal efficiency - CORRECT ANSWER-The fraction of the contaminate that
once in contact with the media is removed by either physical or chemical means
Name the components of a HEPA filter - CORRECT ANSWER-
• Media
• separators,
• filter pack
Answers | 2025 Updated Solutions |
100% Correct Answers
What are the types of Microorganisms - CORRECT ANSWER-
• Virus,
• Bacteria,
• Fungi
A baghouse is composed of - CORRECT ANSWER-
• house,
• hoppers,
• tubesheet
• plenum
A typical oil mist electrostatic presipitator has what sections (inlet to outlet) - CORRECT
ANSWER-
• Baffle,
• ionizer,
• collecting,
• fan
• optional after filter
What is Capacity - CORRECT ANSWER-The amount the media is capable of removing
- this determines the life of the filter
What are two types of filter options - CORRECT ANSWER-partial bypass, total retention
What is the ASHRAE standard 62.1/62.2 - CORRECT ANSWER-Ventilation for
acceptable indoor air quality to specific minimum ventilation rates IAQ which will be
acceptable to humans and are intended to avoid adverse health effects
How many classifications of air is there? - CORRECT ANSWER-4
What are the IAQ testing applications - CORRECT ANSWER-Particulate contaminants,
Gas phase, systems integrity, comfort parameters
What are the control strategies - CORRECT ANSWER-
• Filtration
• source removal
, • Dilution
Min demonstrated overspray filter eff must be at least - CORRECT ANSWER-98%
What is the min eff for a Super ULPA - CORRECT ANSWER-99.9999% on MPPS
What are the factors affecting ESP design and efficiency - CORRECT ANSWER-
• partical size
• velocity through filter
• voltage on ionizer and collector
• collector plate spacing,
• collector plate loading,
• ionizer spacing and ozone
PCO has how many types of reactor configurations - CORRECT ANSWER-4
In the filter industry, a manometer is used to measure what? - CORRECT ANSWER-
Pressure drop across the 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
ULPA stands for? - CORRECT ANSWER-Ultimate low penetration Air Filter
What are the 3 types of media used in contaminate control - CORRECT ANSWER-
• Active carbon
• chemically treated carbon
• potassium permanganate
What is residence time? - CORRECT ANSWER-the time it takes air to cross a distance
equal to the thickness of the filter without accounting for the resistance of the media
through which it travels
What are the variations of the contamination control principle - CORRECT ANSWER-
clean the air required by the process, blanket the product with cleaned air, offer enough
air flow to move contaminated air away from the product
What is removal efficiency - CORRECT ANSWER-The fraction of the contaminate that
once in contact with the media is removed by either physical or chemical means
Name the components of a HEPA filter - CORRECT ANSWER-
• Media
• separators,
• filter pack
