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DC Master Air Conditioning & Refrigeration Mechanical
Unlimited (311) Exam Actual Test Questions and Correct
Answers With Rationales LATEST THIS YEAR
DC Master Air Conditioning & Refrigeration Mechanical Unlimited (311) Exam
Below is a comprehensive practice exam for the DC Master HVAC license. The questions cover licensing
regulations, DC code requirements, refrigeration theory, system components, electrical controls, and
installation practices.
Section 1: DC Licensing & Regulatory Requirements
Question 1: What is the primary regulatory body responsible for issuing building permits in Washington,
DC?
A) Department of Environmental Protection (DEP)
B) Department of Consumer and Regulatory Affairs (DCRA)
C) Washington Building Authority (WBA)
D) DC Public Works Department (DCPWD)
Answer: B) Department of Consumer and Regulatory Affairs (DCRA)
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Explanation: The DCRA is charged with issuing permits and enforcing building and mechanical codes in
Washington, DC .
Question 2: Which code is most essential when reviewing local mechanical regulations in Washington,
DC?
A) International Plumbing Code
B) International Mechanical Code (IMC)
C) National Electrical Code (NEC)
D) Uniform Building Code
Answer: B) International Mechanical Code (IMC)
Explanation: The International Mechanical Code is the key reference for local mechanical and HVAC
regulations in DC .
Question 3: A Master HVAC contractor in DC is required to have which of the following?
A) A high school diploma only
B) A state-issued Master license
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C) Only apprenticeship experience
D) A temporary permit
Answer: B) A state-issued Master license
Explanation: In Washington, DC, a Master HVAC contractor must hold a state-issued Master license to
practice .
Question 4: According to DC Code § 47-2853.202, how many consecutive years of experience are
required for a Master Mechanic license?
A) 2 years
B) 3 years
C) 4 years
D) 5 years
Answer: D) 5 years
Explanation: An applicant for licensure as a master mechanic must establish employment installing,
maintaining, repairing, and replacing refrigeration and air conditioning equipment for at least 5
consecutive years immediately preceding the application date .
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Question 5: What is the horsepower limit for a "Master Mechanic Limited" license in DC?
A) 10 compressor horsepower
B) 15 compressor horsepower
C) 25 compressor horsepower
D) 50 compressor horsepower
Answer: C) 25 compressor horsepower
Explanation: A Master Mechanic Limited license is restricted to systems up to and including 25
compressor horsepower or the equivalent tons of refrigeration in the aggregate .
Question 6: According to DC Municipal Regulations, what must a contractor do if a master mechanic
severs their connection with the company?
A) Nothing; it's automatic
B) Both the master and contractor must promptly notify the Director
C) Only the contractor needs to notify the Director
D) Only the master mechanic needs to notify the Director
Answer: B) Both the master and contractor must promptly notify the Director
DC Master Air Conditioning & Refrigeration Mechanical
Unlimited (311) Exam Actual Test Questions and Correct
Answers With Rationales LATEST THIS YEAR
DC Master Air Conditioning & Refrigeration Mechanical Unlimited (311) Exam
Below is a comprehensive practice exam for the DC Master HVAC license. The questions cover licensing
regulations, DC code requirements, refrigeration theory, system components, electrical controls, and
installation practices.
Section 1: DC Licensing & Regulatory Requirements
Question 1: What is the primary regulatory body responsible for issuing building permits in Washington,
DC?
A) Department of Environmental Protection (DEP)
B) Department of Consumer and Regulatory Affairs (DCRA)
C) Washington Building Authority (WBA)
D) DC Public Works Department (DCPWD)
Answer: B) Department of Consumer and Regulatory Affairs (DCRA)
, Page 2 of 109
Explanation: The DCRA is charged with issuing permits and enforcing building and mechanical codes in
Washington, DC .
Question 2: Which code is most essential when reviewing local mechanical regulations in Washington,
DC?
A) International Plumbing Code
B) International Mechanical Code (IMC)
C) National Electrical Code (NEC)
D) Uniform Building Code
Answer: B) International Mechanical Code (IMC)
Explanation: The International Mechanical Code is the key reference for local mechanical and HVAC
regulations in DC .
Question 3: A Master HVAC contractor in DC is required to have which of the following?
A) A high school diploma only
B) A state-issued Master license
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C) Only apprenticeship experience
D) A temporary permit
Answer: B) A state-issued Master license
Explanation: In Washington, DC, a Master HVAC contractor must hold a state-issued Master license to
practice .
Question 4: According to DC Code § 47-2853.202, how many consecutive years of experience are
required for a Master Mechanic license?
A) 2 years
B) 3 years
C) 4 years
D) 5 years
Answer: D) 5 years
Explanation: An applicant for licensure as a master mechanic must establish employment installing,
maintaining, repairing, and replacing refrigeration and air conditioning equipment for at least 5
consecutive years immediately preceding the application date .
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Question 5: What is the horsepower limit for a "Master Mechanic Limited" license in DC?
A) 10 compressor horsepower
B) 15 compressor horsepower
C) 25 compressor horsepower
D) 50 compressor horsepower
Answer: C) 25 compressor horsepower
Explanation: A Master Mechanic Limited license is restricted to systems up to and including 25
compressor horsepower or the equivalent tons of refrigeration in the aggregate .
Question 6: According to DC Municipal Regulations, what must a contractor do if a master mechanic
severs their connection with the company?
A) Nothing; it's automatic
B) Both the master and contractor must promptly notify the Director
C) Only the contractor needs to notify the Director
D) Only the master mechanic needs to notify the Director
Answer: B) Both the master and contractor must promptly notify the Director
