NCT Professional Standards & Competencies 3 — Questions and Answers
Question 1: A NAFA-certified technician should obtain written authorization before performing work that exceeds the original scope because:
- It speeds up invoicing
- It protects both parties and ensures informed client consent (Correct answer)
- OSHA requires it for all HVAC work
- It is only necessary for work over $1,000
Correct answer: It protects both parties and ensures informed client consent
Written authorization for scope changes protects the technician legally and ensures the client understands and agrees to additional work.
Question 2: The principle of 'duty of care' in air filtration service means a technician must:
- Handle all filters with gloves at all times
- Act with reasonable skill and caution to prevent harm to the client's system and occupants (Correct answer)
- Only use NAFA-approved filter brands
- Carry liability insurance above $2 million
Correct answer: Act with reasonable skill and caution to prevent harm to the client's system and occupants
Duty of care obligates the technician to perform services competently and safely, protecting building occupants and the client's equipment.
Question 3: When a technician is uncertain whether a specific application requires HEPA or ULPA filtration, the best professional practice is to:
- Default to ULPA to be safe
- Consult NAFA resources, industry standards, or application engineering support (Correct answer)
- Ask the building occupants for their preference
- Use MERV 16 as a universal substitute
Correct answer: Consult NAFA resources, industry standards, or application engineering support
Consulting authoritative sources before recommending high-performance filtration ensures the correct product is specified for the hazard level.
Question 4: Professionalism in post-service client communication includes:
- Sending invoices only, with no further contact
- Providing a summary of work performed, findings, and recommended next steps (Correct answer)
- Discussing competitor weaknesses
- Guaranteeing filter performance regardless of conditions
Correct answer: Providing a summary of work performed, findings, and recommended next steps
A professional service summary reinforces trust, documents completed work, and sets clear expectations for future maintenance.
Question 5: Which ethical obligation applies when a NAFA technician identifies a serious indoor air quality hazard unrelated to the current service call?
- Ignore it since it is outside the scope of work
- Notify the client of the hazard even if resolving it is outside the contracted scope (Correct answer)
- Repair it and add it to the invoice without prior approval
- Contact the local health department directly without telling the client
Correct answer: Notify the client of the hazard even if resolving it is outside the contracted scope
Professionals have an obligation to disclose known hazards to protect client health and safety, even when outside the contracted scope.
Question 6: A technician who accepts gifts or incentives from a filter manufacturer in exchange for recommending their products is violating which principle?
- OSHA anti-bribery regulation
- Conflict of interest and professional impartiality (Correct answer)
- NAFA continuing education policy
- Fair labor standards
Correct answer: Conflict of interest and professional impartiality
Accepting vendor incentives to influence product recommendations creates a conflict of interest that undermines the technician's independent professional judgment.
Question 7: Field notes taken during a site survey should be treated as:
- Informal reminders with no formal standing
- Official records that support work orders, proposals, and compliance documentation (Correct answer)
- Proprietary vendor information
- Temporary data discarded after invoicing
Correct answer: Official records that support work orders, proposals, and compliance documentation
Field notes are professional records that provide an auditable trail supporting specifications, client communications, and regulatory compliance.
NCT Professional Standards & Competencies 3
A NAFA-certified technician should obtain written authorization before performing work that exceeds the original scope because: