Arkansas Mechanical Contractor
(M) Practice Exam | Questions,
Verified Answers & Detailed
Rationales | Complete Contractor
License Exam Prep Study Guide |
Updated 2026
1.
Which work is included within Arkansas's mechanical
contracting classification?
A. Heating, ventilation, air conditioning, and
refrigeration
B. Road construction only
C. Electrical utility distribution only
D. Structural steel fabrication only
Correct Answer: Heating, ventilation, air conditioning,
and refrigeration
Rationale: Arkansas's mechanical classification includes
HVACR and other listed mechanical specialties,
including plumbing, boilers, piping, sheet metal/duct,
and related mechanical work.
2.
A mechanical contractor classification in Arkansas is associated
with which two trade licenses?
A. Master electrician and journeyman electrician
B. Master plumber and Class A or Class B HVACR
C. General building and electrical apprentice
D. Fire marshal and boiler operator
,Correct Answer: Master plumber and Class A or Class B
HVACR
Rationale: Arkansas mechanical contractors must
maintain the required plumbing and HVACR expertise
through the specified licensed personnel.
3.
Which component is designed primarily to remove heat from a
conditioned space?
A. Furnace
B. Boiler
C. Evaporator
D. Condenser
Correct Answer: Evaporator
Rationale: The evaporator absorbs heat from the
conditioned space or medium. The condenser rejects
that absorbed heat to another medium.
4.
What is the primary function of a condenser in a vapor-
compression refrigeration system?
A. Absorb heat from the conditioned space
B. Meter refrigerant into the evaporator
C. Reject heat from the refrigerant
D. Increase indoor humidity
Correct Answer: Reject heat from the refrigerant
Rationale: High-pressure refrigerant vapor releases
heat in the condenser and changes into a liquid.
5.
,Which component controls the amount of refrigerant entering
an evaporator?
A. Accumulator
B. Receiver
C. Expansion device
D. Condenser fan
Correct Answer: Expansion device
Rationale: A metering or expansion device regulates
refrigerant flow and creates the pressure drop required
for evaporation.
6.
What is superheat?
A. The temperature of saturated liquid below its boiling point
B. The temperature of vapor above its saturation
temperature
C. The pressure difference between liquid and vapor
D. The temperature of condenser water
Correct Answer: The temperature of vapor above its
saturation temperature
Rationale: Superheat indicates how far a vapor has been
heated above its saturation temperature at a given
pressure.
7.
What is subcooling?
A. Heating vapor above saturation temperature
B. Increasing evaporator pressure
C. Cooling a liquid below its saturation temperature
D. Reducing compressor horsepower
, Correct Answer: Cooling a liquid below its saturation
temperature
Rationale: Subcooling provides liquid refrigerant below
its condensing saturation temperature before it reaches
the metering device.
8.
A dirty condenser coil will commonly cause which condition?
A. Lower condensing pressure
B. Lower head pressure
C. Higher condensing pressure
D. Zero evaporator pressure
Correct Answer: Higher condensing pressure
Rationale: Dirt restricts heat transfer from the
condenser, causing refrigerant condensing temperature
and pressure to rise.
9.
What is the primary purpose of a filter-drier in a refrigeration
system?
A. Increase compressor speed
B. Remove moisture and contaminants
C. Increase evaporator temperature
D. Add refrigerant
Correct Answer: Remove moisture and contaminants
Rationale: Filter-driers capture moisture, acids, and
particulate contaminants that could damage
refrigeration components.
10.
(M) Practice Exam | Questions,
Verified Answers & Detailed
Rationales | Complete Contractor
License Exam Prep Study Guide |
Updated 2026
1.
Which work is included within Arkansas's mechanical
contracting classification?
A. Heating, ventilation, air conditioning, and
refrigeration
B. Road construction only
C. Electrical utility distribution only
D. Structural steel fabrication only
Correct Answer: Heating, ventilation, air conditioning,
and refrigeration
Rationale: Arkansas's mechanical classification includes
HVACR and other listed mechanical specialties,
including plumbing, boilers, piping, sheet metal/duct,
and related mechanical work.
2.
A mechanical contractor classification in Arkansas is associated
with which two trade licenses?
A. Master electrician and journeyman electrician
B. Master plumber and Class A or Class B HVACR
C. General building and electrical apprentice
D. Fire marshal and boiler operator
,Correct Answer: Master plumber and Class A or Class B
HVACR
Rationale: Arkansas mechanical contractors must
maintain the required plumbing and HVACR expertise
through the specified licensed personnel.
3.
Which component is designed primarily to remove heat from a
conditioned space?
A. Furnace
B. Boiler
C. Evaporator
D. Condenser
Correct Answer: Evaporator
Rationale: The evaporator absorbs heat from the
conditioned space or medium. The condenser rejects
that absorbed heat to another medium.
4.
What is the primary function of a condenser in a vapor-
compression refrigeration system?
A. Absorb heat from the conditioned space
B. Meter refrigerant into the evaporator
C. Reject heat from the refrigerant
D. Increase indoor humidity
Correct Answer: Reject heat from the refrigerant
Rationale: High-pressure refrigerant vapor releases
heat in the condenser and changes into a liquid.
5.
,Which component controls the amount of refrigerant entering
an evaporator?
A. Accumulator
B. Receiver
C. Expansion device
D. Condenser fan
Correct Answer: Expansion device
Rationale: A metering or expansion device regulates
refrigerant flow and creates the pressure drop required
for evaporation.
6.
What is superheat?
A. The temperature of saturated liquid below its boiling point
B. The temperature of vapor above its saturation
temperature
C. The pressure difference between liquid and vapor
D. The temperature of condenser water
Correct Answer: The temperature of vapor above its
saturation temperature
Rationale: Superheat indicates how far a vapor has been
heated above its saturation temperature at a given
pressure.
7.
What is subcooling?
A. Heating vapor above saturation temperature
B. Increasing evaporator pressure
C. Cooling a liquid below its saturation temperature
D. Reducing compressor horsepower
, Correct Answer: Cooling a liquid below its saturation
temperature
Rationale: Subcooling provides liquid refrigerant below
its condensing saturation temperature before it reaches
the metering device.
8.
A dirty condenser coil will commonly cause which condition?
A. Lower condensing pressure
B. Lower head pressure
C. Higher condensing pressure
D. Zero evaporator pressure
Correct Answer: Higher condensing pressure
Rationale: Dirt restricts heat transfer from the
condenser, causing refrigerant condensing temperature
and pressure to rise.
9.
What is the primary purpose of a filter-drier in a refrigeration
system?
A. Increase compressor speed
B. Remove moisture and contaminants
C. Increase evaporator temperature
D. Add refrigerant
Correct Answer: Remove moisture and contaminants
Rationale: Filter-driers capture moisture, acids, and
particulate contaminants that could damage
refrigeration components.
10.
