Air Systems Cleaning Specialist

Here you have the best NADCA ASCS practice exam questions

  • You have 148 total questions across 30 pages (5 per page)
  • These questions were last updated on February 15, 2026
  • This site is not affiliated with or endorsed by NADCA.
Question 1 of 148

According to ACR, The NADCA Standard, properly performed HVAC system cleaning services should:
Answer

Suggested Answer

The suggested answer is D.

According to the NADCA (National Air Duct Cleaners Association) Standard, properly performed HVAC system cleaning services should render the system visibly clean. This means that all the key components of the system should be free from visible dust and debris after cleaning. Ensuring visible cleanliness is a standardized measure of quality in HVAC cleaning services.

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Question 2 of 148

Which of the following creates the greatest restriction of airflow?
Answer

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The suggested answer is C.

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Question 3 of 148

Having a regular HVAC filter replacement plan can help:
Answer

Suggested Answer

The suggested answer is A.

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Question 4 of 148

According to ACR, The NADCA Standard, proper cleaning and maintenance of an HVAC system:
Answer

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The suggested answer is B.

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Question 5 of 148

During a commercial site survey, an ASCS should do which of the following to determine client expectations?
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The suggested answer is B.

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About the NADCA ASCS Certification Exam

About the Exam

The NADCA ASCS (Air Systems Cleaning Specialist) validates your knowledge and skills. Passing demonstrates proficiency and can boost your career prospects in the field.

How to Prepare

Work through all 148 practice questions across 30 pages. Focus on understanding the reasoning behind each answer rather than memorizing responses to be ready for any variation on the real exam.

Why Practice Exams?

Practice exams help you familiarize yourself with the question format, manage your time, and reduce anxiety on the test day. Our ASCS questions are regularly updated to reflect the latest exam objectives.