ASCSAir Systems Cleaning Specialist practice test
240 NADCA ASCS practice questions with explanations, in study, timed and flashcard modes. 20 samples are free.
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All 240 questions with explanations · Study, timed and flashcard modes · Progress saved, resume any time
- Questions
- 240
- Free samples
- 20
- Versions
- 1
- Updated
- Aug 2025
Practice ASCS in the simulator.
Study, timed and flashcard modes. Answers and explanations as you go, and your progress saves.
ASCS, by the numbers.
Official specifications published by NADCA.
- Duration
- 210 min
- Questions
- 150
- Passing score
- Not publicly specified
- Valid for
- 1 year
- In the bank
- v1 (240)
Everything about ASCS.
ASCS · NADCA · 2023
Exam information
Official specifications published by NADCA, plus what is in our question bank.
- Duration
- 210 min
- Questions
- 150
- Passing score
- Not publicly specified
- Level
- Specialist
What ASCS covers
7 weighted domains. Open a domain for its topics, and a topic for its objectives. Practice questions are tagged to these.
How do I earn this certification?
Passing ASCS earns the Air Systems Cleaning Specialist in the HVAC Hygiene and Indoor Air Quality track.
- No formal prerequisitesoptional
How to study for this exam?
Use the ASCS practice test alongside the official material below.
- ASCS Candidate's GuidePDF · Free
Complete exam content outline, recommended reading, and exam information
- ACR, The NADCA Standard (2021 Edition)PDF/Print · Varies
Primary standard for HVAC assessment, cleaning, and restoration procedures
- ASCS to the ACR Standard Resource ManualPDF/Print · $395 members / $595 non-members
Comprehensive manual including all study materials for ASCS exam
What's changed on this exam?
Status and coverage changes that affect what you should study.
- Current status
- ACTIVE
- Last content update
- 2023
Who should take this exam?
ASCS is typically taken by HVAC cleaning technicians, Project managers and Business owners in air duct cleaning, among 2 other roles. Experience level: intermediate.
Three ways to practise
Study mode
Work through the bank at your own pace with the answer and explanation one tap away. Flag questions, add notes, bookmark the hard ones.
Open in the simulator
Timed mode
A shuffled deck with a countdown that mirrors the real exam. Your score is saved to your attempt history.
Open in the simulator
Flashcards
Question on the front, answer on the back. Good for the last week before the exam.
Open in the simulator
