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313D Residential Air Conditioning Systems Mechanic

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About this Exam

Prepare with the 313D Residential Air Conditioning Systems Mechanic practice quiz. This question bank includes 150 questions covering technician, residential, conditioning, refrigerant, and duct. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

Sample Questions

Question 1
A homeowner complains of a persistent whistling noise coming from a supply air register, which becomes louder when other registers in the house are closed. What is the most probable cause of this issue?
The return air filter is oversized.
The air velocity through the register is too high.
The thermostat is located too close to the supply register.
The ductwork is oversized for the system's CFM output.
Question 2
In rectangular duct design, what does the term 'aspect ratio' describe?
The ratio of the duct's total length to its total CFM.
The ratio of static pressure to velocity pressure.
The ratio of the duct's longer side to its shorter side.
The ratio of supply airflow to return airflow.
Question 3
A technician is inspecting ductwork in an attic and identifies a type of duct constructed with a helical wire coil core, covered by a polymer plastic liner, a layer of insulation, and an outer vapor barrier jacket. Which type of duct material is this?
Sheet metal duct
Fiberglass duct board
Flexible duct (Flex duct)
PVC duct
Question 4
A technician measures the total external static pressure (TESP) of a residential air handler and gets a reading of 0.95 in. w.c. (inches of water column). The equipment's data plate specifies a maximum TESP of 0.5 in. w.c. Which of the following is a direct consequence of this high static pressure?
The system will provide excess airflow, overcooling the space.
The blower motor will work less, consuming less electricity.
The compressor will short-cycle due to rapid heat exchange.
The blower motor will be strained, leading to reduced airflow and potential premature failure.
Question 5
According to ACCA Manual D, what is the primary objective of the residential duct design process?
To calculate the total heating and cooling load for the structure.
To select the specific brand and model of HVAC equipment.
To size the duct system to deliver the correct CFM to each room with minimal pressure loss.
To determine the R-value of insulation required for the building envelope.

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Additional Information

313D Residential Air Conditioning Systems Mechanic

This practice set contains 150 questions from the matching question bank and focuses on technician, residential, conditioning, refrigerant, and duct. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Frequently Asked Questions

This quiz contains a total of 150 practice questions carefully selected to test your knowledge on this subject.
Yes, you will have exactly 0 minutes to complete the exam. A countdown timer will be visible once you start.
Yes, you can retake this practice test as many times as you need. The questions and options may be randomized on subsequent attempts to ensure comprehensive learning.

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