Exit demo NADCA-ASCS Air Systems Cleaning Specialist PDF format · free preview

NADCA NADCA-ASCS - Questions & Answers

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Question 1
Single choice

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

A.

eliminate all contamination.

B.

restore the internal insulation to an "as new" condition.

C.

restore the evaporator coil to its original pressure drop.

D.

render the system visibly clean.

Question 2
Single choice

Which of the following creates the greatest restriction of airflow?

A.

A dirty fan motor

B.

A dirty plenum

C.

A dirty coil

D.

A dirty return duct

Question 3
Single choice

Having a regular HVAC filter replacement plan can help:

A.

protect the system components.

B.

double the system' airflow.

C.

humidify the airflow.

D.

sanitize the system components.

Question 4
Single choice

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

A.

eliminates odors.

B.

adds to the life expectancy of a system.

C.

reduces noise pollution.

D.

adds to the value of the HVAC system.

Question 5
Single choice

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

A.

Interview the client's employees

B.

Ask the client a series of specific questions prior to inspection

C.

Perform the inspection without interaction with the client

D.

Consult an Indoor Environmental Professional (IEP) to determine IAQ

Question 6
Single choice

Dirt streaks around supply diffusers that are NOT caused by a dirty ventilation system are MOST likely caused by:

A.

Slow discharge velocities.

B.

elevated relative humidity.

C.

dirty room air at the diffuser.

D.

thermal stratification around the diffuser.

Question 7
Single choice

According to ACR, The NADCA Standard, which of the following is the PRIMARY purpose of a written work plan?

A.

Minimizes potential for legal action against the contractor

B.

Allows a clear understanding of what work will be performed

C.

Ensures compliance with current Occupational Safety and Health Administration (OSHA) regulations

D.

Documents the complete list of materials to be used on the job site

Question 8
Single choice

A package unit contains which of the following components?

A.

Compressor, evaporator coil, condenser, supply fan, and filter

B.

Evaporator coil, VAV box, condenser, supply fan, exhaust fan, and filter

C.

Compressor, hat water coil, condenser, supply fan, exhaust fan, and filter

D.

Compressor, evaporator coil, condenser, supply fan, thermostat, and filter

Question 9
Single choice

The MOST common types of fuel consumed in modern residential HVAC systems are:

A.

natural gas, propane, and oil

B.

electric, propane, and oil

C.

natural gas, methane, and oil

D.

natural gas, propane, and ethanol

Question 10
Single choice

What type of supply fan transfers large volumes of air with a minimal wheel diameter?

A.

Backward-inclined fan

B.

Forward-curved fan

C.

Axial fan

D.

Radial fan

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