Toxicity is defined as the:
A. amount of contaminants inside an HVAC system.
B. adverse effects resulting from exposure to a material.
C. amount of mold found on the condensing coil.
D. amount of contaminants as a result of “Dirty Sock Syndrome”.
According to NAIMA AH 122, Cleaning Fibrous Glass Insulated Air Duct Systems, it is recommended that fibrous glass duct insulation that has become wet in service should be:
A. dried and cleaned.
B. cleaned and coated.
C. removed and replaced.
D. dried and sanitized.
An HVAC system can cause Building Related Illness (BRI) if:
A. contaminants in the system affect building occupants.
B. occupants complain of poor airflow.
C. excess temperatures make occupants irritable.
D. odors travel through the duct system.
A MAIN reason that hospital patients are at risk for infection from dirty HVAC systems is that:
A. outside air intake is near loading dock.
B. patients commonly have weakened immune systems.
C. patients commonly have chemical sensitivity.
D. hospital odors travel through the duct system.
Vacuum collection equipment shall be cleaned and inspected:
A. at least every three months.
B. at least every six months.
C. after the equipment is removed from the job site.
D. before the equipment is brought onto the job site.
According to ACR, The NADCA Standard, environmental engineering controls are used to protect the:
A. HVAC blower motor from excess debris.
B. ASCS from the uncontrolled release of energy.
C. outdoor environment during cleaning.
D. workers and building occupants.
The vacuum collection device used to convey air with debris shall maintain a sufficient velocity and negative pressure:
A. downstream of the evaporator coil.
B. in the mechanical room where the ductwork is located.
C. in the portion of the ductwork being cleaned.
D. upstream of the evaporator coil.
According to ACR, The NADCA Standard, Cleaning of coils with steam is described as:
A. Type 1.
B. Method 1.
C. Type 2.
D. Method 2.
Which of the following would NOT be appropriate for use in cleaning internally-lined sheet metal ductwork?
A. HEPA contact vacuum
B. Skipper ball
C. Soft nylon brush
D. Silica carbide brush
When cutting into fibrous glass duct board, which hand tool is MOST effective?
A. Jigsaw
B. Snips
C. Nibbler
D. Straight knife
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