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NADCA-ASCS Real Exam Questions

Air Systems Cleaning Specialist

148 questions available · Page 1 of 15

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Question 1 Single choice

Which of the following is the proper disposal procedure for visually contaminated HVAC filters?

  1. A

    Place in double plastic bags, seal with duct tape, and leave it in the mechanical room

  2. B

    Place in a cardboard box and leave it in the mechanical room

  3. C

    Place in double plastic bags and seal with duct tape prior to transporting through the occupied space

  4. D

    Place in a sealed cardboard box prior to transporting through the occupied space

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Correct answer: C

Question 2 Single choice

An ASCS is cleaning an exhaust system that has a fan located adjacent to an outside air intake.

Which of the following is a potential source of cross-contamination?

  1. A

    Thermal drift

  2. B

    Stratification

  3. C

    Capture of exhaust air

  4. D

    Negative pressure in the exhaust duct

Show answer and explanation

Correct answer: C

Question 3 Single choice

When cutting into fibrous glass duct board, which hand tool is MOST effective?

  1. A

    Jigsaw

  2. B

    Snips

  3. C

    Nibbler

  4. D

    Straight knife

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Correct answer: D

Question 4 Single choice

In what sequence is an HVAC system typically cleaned?

  1. A

    Supply, air handler, return

  2. B

    Exhaust, air handler, return, supply

  3. C

    Return, supply, exhaust, air handler

  4. D

    Return, air handler, supply

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Correct answer: B

Question 5 Single choice

During routine inspections where no local problem is discovered, an inspector shall inspect at least:

  1. A

    5% of similar systems.

  2. B

    10% of similar systems.

  3. C

    15% of similar systems.

  4. D

    20% of similar systems.

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Correct answer: B

Question 6 Single choice

Steam cleaning is considered:

  1. A

    wet-process cleaning.

  2. B

    Type 1 cleaning.

  3. C

    brush-process cleaning.

  4. D

    pneumatic whip cleaning.

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Correct answer: A

Question 7 Single choice

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

  1. A

    Interview the client's employees

  2. B

    Ask the client a series of specific questions prior to inspection

  3. C

    Perform the inspection without interaction with the client

  4. D

    Consult an Indoor Environmental Professional (IEP) to determine IAQ

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Correct answer: B

Question 8 Single choice

It is recommended that post project reports contain

  1. A

    daily reports

  2. B

    photographic documentation

  3. C

    equipment calibration

  4. D

    HEPA certification

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Correct answer: B

Question 9 Single choice

When working inside a permit-required confined space, the priority should be to

  1. A

    not block or reduce airflow

  2. B

    provide moisture and mold controls

  3. C

    ensure acceptable entry/exit conditions

  4. D

    provide adequate lighting

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Correct answer: C

Question 10 Single choice

What is the cleaning method that uses water and/or liquid chemicals?

  1. A

    Surface process

  2. B

    Type 1

  3. C

    Condition 1

  4. D

    Wet process

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Correct answer: D