Question 6 of 148
Dirt streaks around supply diffusers that are NOT caused by a dirty ventilation system are MOST likely caused by:
Answer

Suggested Answer

The suggested answer is C.

Dirt streaks around supply diffusers that are not caused by a dirty ventilation system are most likely caused by dirty room air at the diffuser. When the room air contains dust and other particles, these can accumulate around the diffuser as the air is discharged, leading to visible streaks.

Community Votes3 votes
CSuggested
67%
D
33%
Question 7 of 148
According to ACR, The NADCA Standard, which of the following is the PRIMARY purpose of a written work plan?
Answer

Suggested Answer

The suggested answer is B.

Community Votes1 vote
BSuggested
100%
Question 8 of 148
A package unit contains which of the following components?
Answer

Suggested Answer

The suggested answer is D.

A package unit typically contains a compressor, an evaporator coil, a condenser, a supply fan, a thermostat, and a filter. These components are essential for the functioning of a packaged HVAC system. Other options mentioning components such as a VAV box or an exhaust fan are not typical for standard package units.

Community Votes2 votes
AMost voted
100%
Question 9 of 148
The MOST common types of fuel consumed in modern residential HVAC systems are:
Answer

Suggested Answer

The suggested answer is A.

The most common types of fuel consumed in modern residential HVAC systems are natural gas, propane, and oil. These fuels are widely used for their efficiency and availability in residential heating and cooling systems.

Community Votes2 votes
ASuggested
100%
Question 10 of 148
What type of supply fan transfers large volumes of air with a minimal wheel diameter?
Answer

Suggested Answer

The suggested answer is B.

A forward-curved fan is typically used for transferring large volumes of air with a minimal wheel diameter. These fans are capable of moving a significant amount of air at lower speeds and are commonly used in HVAC systems due to their efficiency in providing high airflow with low noise levels.

Community Votes3 votes
BSuggested
100%