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Arkansas HVAC/R Class B Contractor
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
___________________________________________________________________
1.
Under current Arkansas HVACR licensing rules, what is the maximum cooling
capacity of an individual air-conditioning system that may generally be performed
under a Class B license?
A. 15 tons
B. 20 tons
C. 25 tons
D. 50 tons
Answer: 25 tons
Rationale: Arkansas Class B licensing permits HVACR work on air-conditioning
systems developing not more than 25 tons of cooling capacity per unit. Systems
exceeding the Class B limitation generally require the appropriate higher
classification.
2.
What is the maximum heating input per unit generally permitted under an
Arkansas Class B HVACR license?
A. 500,000 BTUH
B. 750,000 BTUH
,C. 1,000,000 BTUH
D. 1,500,000 BTUH
Answer: 1,000,000 BTUH
Rationale: The Class B limitation is 1,000,000 BTUH heating input per unit. The
limitation is based on the individual unit rather than simply the combined
heating capacity of an entire facility.
3.
A refrigeration system is rated at 15 horsepower. Assuming all other licensing
requirements are satisfied, which Arkansas HVACR classification can generally
perform the work?
A. Class D only
B. Class B
C. Class L only
D. Registration only
Answer: Class B
Rationale: Class B covers refrigeration systems of 15 horsepower or less per unit.
The horsepower limitation applies to the individual refrigeration unit.
4.
Which condition most directly indicates that a Class B contractor should evaluate
whether a higher HVACR classification is required?
A. The project has multiple thermostats
B. The system uses a variable-speed blower
C. One air-conditioning unit exceeds the Class B capacity limitation
D. The system contains a filter rack
Answer: One air-conditioning unit exceeds the Class B capacity limitation
,Rationale: Licensing classification is tied to equipment capacity and the type of
HVACR work authorized. A contractor must not use a Class B license outside its
authorized scope.
5.
A 20-ton rooftop unit has a design sensible heat ratio of 0.75. If total cooling
capacity is 240,000 Btu/h, what is the approximate sensible cooling capacity?
A. 60,000 Btu/h
B. 120,000 Btu/h
C. 180,000 Btu/h
D. 240,000 Btu/h
Answer: 180,000 Btu/h
Rationale: Sensible capacity equals total capacity multiplied by sensible heat
ratio: 240,000 × 0.75 = 180,000 Btu/h.
6.
What is the primary purpose of a Manual J-type residential load calculation?
A. Determine refrigerant charge
B. Determine required heating and cooling capacity
C. Determine compressor oil level
D. Determine electrical service voltage
Answer: Determine required heating and cooling capacity
Rationale: Load calculations estimate building heating and cooling
requirements. Equipment should be selected from calculated loads rather than
simply matching existing equipment size.
7.
Oversizing a residential air conditioner substantially above the calculated cooling
load commonly causes which problem?
, A. Excessive latent moisture removal
B. Longer run times and improved dehumidification
C. Short cycling and reduced humidity control
D. Increased evaporator superheat only
Answer: Short cycling and reduced humidity control
Rationale: An oversized system can satisfy sensible temperature demand rapidly
and shut off before operating long enough to remove adequate latent moisture.
8.
Which building characteristic most directly increases sensible cooling load?
A. Increased insulation
B. Reduced solar exposure
C. Increased solar heat gain through glazing
D. Reduced internal equipment load
Answer: Increased solar heat gain through glazing
Rationale: Solar radiation through windows can contribute significantly to
sensible cooling load, particularly on west- and south-facing exposures
depending on location and orientation.
9.
A duct system has excessive static pressure and inadequate airflow. Which
condition is most likely?
A. Blower operates against excessive resistance
B. Refrigerant automatically becomes subcooled
C. Compressor displacement increases
D. Condenser pressure necessarily decreases
Answer: Blower operates against excessive resistance
Arkansas HVAC/R Class B Contractor
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
___________________________________________________________________
1.
Under current Arkansas HVACR licensing rules, what is the maximum cooling
capacity of an individual air-conditioning system that may generally be performed
under a Class B license?
A. 15 tons
B. 20 tons
C. 25 tons
D. 50 tons
Answer: 25 tons
Rationale: Arkansas Class B licensing permits HVACR work on air-conditioning
systems developing not more than 25 tons of cooling capacity per unit. Systems
exceeding the Class B limitation generally require the appropriate higher
classification.
2.
What is the maximum heating input per unit generally permitted under an
Arkansas Class B HVACR license?
A. 500,000 BTUH
B. 750,000 BTUH
,C. 1,000,000 BTUH
D. 1,500,000 BTUH
Answer: 1,000,000 BTUH
Rationale: The Class B limitation is 1,000,000 BTUH heating input per unit. The
limitation is based on the individual unit rather than simply the combined
heating capacity of an entire facility.
3.
A refrigeration system is rated at 15 horsepower. Assuming all other licensing
requirements are satisfied, which Arkansas HVACR classification can generally
perform the work?
A. Class D only
B. Class B
C. Class L only
D. Registration only
Answer: Class B
Rationale: Class B covers refrigeration systems of 15 horsepower or less per unit.
The horsepower limitation applies to the individual refrigeration unit.
4.
Which condition most directly indicates that a Class B contractor should evaluate
whether a higher HVACR classification is required?
A. The project has multiple thermostats
B. The system uses a variable-speed blower
C. One air-conditioning unit exceeds the Class B capacity limitation
D. The system contains a filter rack
Answer: One air-conditioning unit exceeds the Class B capacity limitation
,Rationale: Licensing classification is tied to equipment capacity and the type of
HVACR work authorized. A contractor must not use a Class B license outside its
authorized scope.
5.
A 20-ton rooftop unit has a design sensible heat ratio of 0.75. If total cooling
capacity is 240,000 Btu/h, what is the approximate sensible cooling capacity?
A. 60,000 Btu/h
B. 120,000 Btu/h
C. 180,000 Btu/h
D. 240,000 Btu/h
Answer: 180,000 Btu/h
Rationale: Sensible capacity equals total capacity multiplied by sensible heat
ratio: 240,000 × 0.75 = 180,000 Btu/h.
6.
What is the primary purpose of a Manual J-type residential load calculation?
A. Determine refrigerant charge
B. Determine required heating and cooling capacity
C. Determine compressor oil level
D. Determine electrical service voltage
Answer: Determine required heating and cooling capacity
Rationale: Load calculations estimate building heating and cooling
requirements. Equipment should be selected from calculated loads rather than
simply matching existing equipment size.
7.
Oversizing a residential air conditioner substantially above the calculated cooling
load commonly causes which problem?
, A. Excessive latent moisture removal
B. Longer run times and improved dehumidification
C. Short cycling and reduced humidity control
D. Increased evaporator superheat only
Answer: Short cycling and reduced humidity control
Rationale: An oversized system can satisfy sensible temperature demand rapidly
and shut off before operating long enough to remove adequate latent moisture.
8.
Which building characteristic most directly increases sensible cooling load?
A. Increased insulation
B. Reduced solar exposure
C. Increased solar heat gain through glazing
D. Reduced internal equipment load
Answer: Increased solar heat gain through glazing
Rationale: Solar radiation through windows can contribute significantly to
sensible cooling load, particularly on west- and south-facing exposures
depending on location and orientation.
9.
A duct system has excessive static pressure and inadequate airflow. Which
condition is most likely?
A. Blower operates against excessive resistance
B. Refrigerant automatically becomes subcooled
C. Compressor displacement increases
D. Condenser pressure necessarily decreases
Answer: Blower operates against excessive resistance
