Register
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?
Correct Answer:
The air velocity through the register is too high.
Question 2
In rectangular duct design, what does the term 'aspect ratio' describe?
Correct Answer:
The ratio of the duct's longer side to its shorter side.
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?
Correct Answer:
Flexible duct (Flex 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?
Correct Answer:
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?
Correct Answer:
To size the duct system to deliver the correct CFM to each room with minimal pressure loss.
Question 1
Exam overview

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.

More details

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.

Quiz information

Frequently Asked Questions

The complete question count is available after full access is unlocked.
No fixed duration is currently configured for this quiz.
Question explanations are included where they are available in the quiz content, helping you review the reasoning after answering.
Yes. You can retake the practice test again as you continue studying during your available access period.
After your access is confirmed, you can continue into the complete practice exam from this quiz flow.
Unless explicitly stated otherwise, this page provides independent practice material for study and exam preparation and is not the official examination itself.
Keep studying

Related Questions

2W151B Munitions Systems Journeyman Volume 2 Practice Exam

0 min

Arizona Low Voltage Communication Systems (ACJIS) Practice Exam

0 min

Arizona DECA Low Voltage Communication Systems Practice Exam

0 min

A&P Mechanic Technician Practice Test

0 min

ASU CEE181 Sustainable Systems Practice Exam

0 min

Certified Professional in Healthcare Information and Management Systems (CPHIMS) Practice Exam

0 min