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:

eliminate all contamination.

restore the internal insulation to an “as new” condition.

restore the evaporator coil to its original pressure drop.

render the system visibly clean.

Question 2 of 148

Which of the following creates the greatest restriction of airflow?

A dirty fan motor

A dirty plenum

A dirty coil

A dirty return duct

Question 3 of 148

Having a regular HVAC filter replacement plan can help:

protect the system components.

double the system’ airflow.

humidify the airflow.

sanitize the system components.

Question 4 of 148

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

eliminates odors.

adds to the life expectancy of a system.

reduces noise pollution.

adds to the value of the HVAC system.

Question 5 of 148

During a commercial site survey, an ASCS should do which of the following to determine client expectations?

Interview the client’s employees

Ask the client a series of specific questions prior to inspection

Perform the inspection without interaction with the client

Consult an Indoor Environmental Professional (IEP) to determine IAQ

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.