MS Residential HVAC Practice Questions - Mississippi Residential HVAC Contractor Examination Exam - MS Residential HVAC Practice Questions - Mississippi Residential HVAC Contractor Examination Exam

Question 1

Cooling-season supply duct wrap in an unconditioned Mississippi attic should have its vapor retarder placed on which side of the insulation?

On the outside of the wrap, facing the attic air Against the metal, facing the supply air stream Omitted entirely if the duct carries only cooled air On both faces so the insulation is vapor-tight in both directions

Correct Answer:

On the outside of the wrap, facing the attic air

Question 2

Per the energy provisions that IMC Section 604.1 points to, what is the minimum installed R-value for supply and return ducts 3 inches in diameter and larger that run in an unconditioned attic?

R-4.2 R-6 R-8 R-12

Correct Answer:

R-8

Question 3

A crew pulls R-8 flex duct tight through attic trusses so the insulation jacket is compressed to about half its manufactured thickness for most of a 20-foot run. What is the primary thermal result?

R-value stays the same because the jacket label still reads R-8 Installed R-value drops because compressed glass fiber has less trapped air R-value increases because the thinner jacket reduces heat-transfer area Only fire rating is affected; thermal resistance is unchanged

Correct Answer:

Installed R-value drops because compressed glass fiber has less trapped air

Question 4

Compared with external duct wrap, internal fibrous duct liner is primarily selected on a residential job when the designer also needs which performance feature?

A vapor retarder on the warm side of a cooling duct A higher UL 181 listing than wrap can provide Sound absorption in the air stream plus some thermal resistance A substitute for sealing longitudinal seams

Correct Answer:

Sound absorption in the air stream plus some thermal resistance

Question 5

IMC Section 603.10 prohibits supporting a metal supply trunk by which method?

Galvanized straps fastened to roof trusses Hanger wire attached to structural framing Another duct or the finished ceiling system Threaded rod and a trapeze under a wide trunk

Correct Answer:

Another duct or the finished ceiling system

Exam overview

About this Exam

Prepare with the MS Residential HVAC Practice Questions - Mississippi Residential HVAC Contractor Examination Exam practice quiz. This question bank includes 100 questions covering residential, heat, cooling, duct, and degrees. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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MS Residential HVAC Practice Questions - Mississippi Residential HVAC Contractor Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on residential, heat, cooling, duct, and degrees. 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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MS Residential HVAC Practice Questions - Mississippi Residential HVAC Contractor Examination Exam

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