CT Heating/Cooling Contractor Exam
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. A Connecticut Heating/Cooling Contractor is reviewing plans for a
commercial building replacement project involving rooftop HVAC
equipment, ductwork, controls, refrigerant piping, condensate
drainage, and electrical connections. Before beginning work, which
approach best reflects sound professional practice regarding
permits, code compliance, and coordination with other trades?
A. Begin installation immediately because HVAC equipment replacement
never requires review by the authority having jurisdiction.
B. Install all mechanical components first and address permit or
inspection requirements only if a problem is discovered.
C. Verify applicable licensing and permit requirements, comply with
adopted mechanical and related codes, and coordinate required
electrical, plumbing, structural, and inspection work.
D. Allow each subcontractor to determine independently whether permits
and inspections are necessary.
Answer: C
,Rationale: A responsible contractor must verify applicable permit and
licensing requirements, comply with the codes adopted by the authority
having jurisdiction, and coordinate interconnected work with other
trades. HVAC projects can involve mechanical, electrical, plumbing,
structural, fire, and energy-code requirements.
2. A contractor must select an HVAC system for a building where
indoor temperature and humidity must remain reasonably stable
throughout the year. Which principle best explains why equipment
capacity should not be selected solely according to the building's
floor area?
A. Floor area always determines the exact refrigeration tonnage required.
B. HVAC capacity depends on multiple load factors, including building
envelope characteristics, occupancy, solar gains, internal equipment
loads, ventilation, and climate conditions.
C. Larger equipment always provides better humidity control regardless of
building conditions.
D. Equipment capacity is determined primarily by the number of electrical
outlets in the building.
Answer: B
Rationale: Proper HVAC sizing requires a load calculation that considers
many sources of sensible and latent heat gain or loss. Floor area alone
does not account for insulation, windows, occupancy, orientation,
ventilation, appliances, or local design conditions.
, 3. During cooling-load analysis, a contractor distinguishes between
sensible heat and latent heat. Which statement correctly describes
latent heat in an air-conditioning application?
A. Heat that changes air temperature without changing its moisture
content.
B. Heat associated primarily with changes in moisture content or phase
change without directly producing a corresponding dry-bulb temperature
change.
C. Heat produced only by electrical resistance heaters.
D. Heat transferred exclusively through building walls by conduction.
Answer: B
Rationale: Latent heat is associated with moisture removal or addition
and phase changes. In air conditioning, latent capacity is particularly
important for dehumidification and occupant comfort.
4. A cooling system is repeatedly starting and stopping during mild
weather, resulting in poor humidity control and increased
equipment wear. The contractor determines that the installed unit
is substantially oversized for the actual load. What is the most likely
explanation for these operating problems?
A. Oversized equipment generally operates continuously and removes
excessive moisture.
B. Oversized equipment may satisfy the thermostat quickly, causing short
cycling and insufficient operating time for effective dehumidification.
C. Oversized equipment always reduces compressor starts and improves
, efficiency.
D. Equipment size has no effect on cycling behavior.
Answer: B
Rationale: Oversized cooling equipment can reduce run time because it
reaches the thermostat setpoint rapidly. Short cycles may prevent
adequate moisture removal and increase compressor and electrical
component wear.
5. A contractor is evaluating airflow through a supply duct system. If
the cross-sectional area of a duct is reduced while the required
airflow remains unchanged, what generally happens to air velocity?
A. Air velocity decreases because the duct is smaller.
B. Air velocity remains unchanged because airflow volume is constant.
C. Air velocity increases because the same airflow must pass through a
smaller area.
D. Air velocity becomes zero unless additional return ducts are installed.
Answer: C
Rationale: Air velocity is related to volumetric airflow divided by duct
cross-sectional area. For the same airflow quantity, reducing the area
increases velocity, which may also increase pressure loss and noise.
6. A duct system has excessive resistance caused by undersized ducts,
numerous sharp fittings, and restrictive accessories. What effect will
excessive external static pressure most likely have on a properly
operating blower?
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. A Connecticut Heating/Cooling Contractor is reviewing plans for a
commercial building replacement project involving rooftop HVAC
equipment, ductwork, controls, refrigerant piping, condensate
drainage, and electrical connections. Before beginning work, which
approach best reflects sound professional practice regarding
permits, code compliance, and coordination with other trades?
A. Begin installation immediately because HVAC equipment replacement
never requires review by the authority having jurisdiction.
B. Install all mechanical components first and address permit or
inspection requirements only if a problem is discovered.
C. Verify applicable licensing and permit requirements, comply with
adopted mechanical and related codes, and coordinate required
electrical, plumbing, structural, and inspection work.
D. Allow each subcontractor to determine independently whether permits
and inspections are necessary.
Answer: C
,Rationale: A responsible contractor must verify applicable permit and
licensing requirements, comply with the codes adopted by the authority
having jurisdiction, and coordinate interconnected work with other
trades. HVAC projects can involve mechanical, electrical, plumbing,
structural, fire, and energy-code requirements.
2. A contractor must select an HVAC system for a building where
indoor temperature and humidity must remain reasonably stable
throughout the year. Which principle best explains why equipment
capacity should not be selected solely according to the building's
floor area?
A. Floor area always determines the exact refrigeration tonnage required.
B. HVAC capacity depends on multiple load factors, including building
envelope characteristics, occupancy, solar gains, internal equipment
loads, ventilation, and climate conditions.
C. Larger equipment always provides better humidity control regardless of
building conditions.
D. Equipment capacity is determined primarily by the number of electrical
outlets in the building.
Answer: B
Rationale: Proper HVAC sizing requires a load calculation that considers
many sources of sensible and latent heat gain or loss. Floor area alone
does not account for insulation, windows, occupancy, orientation,
ventilation, appliances, or local design conditions.
, 3. During cooling-load analysis, a contractor distinguishes between
sensible heat and latent heat. Which statement correctly describes
latent heat in an air-conditioning application?
A. Heat that changes air temperature without changing its moisture
content.
B. Heat associated primarily with changes in moisture content or phase
change without directly producing a corresponding dry-bulb temperature
change.
C. Heat produced only by electrical resistance heaters.
D. Heat transferred exclusively through building walls by conduction.
Answer: B
Rationale: Latent heat is associated with moisture removal or addition
and phase changes. In air conditioning, latent capacity is particularly
important for dehumidification and occupant comfort.
4. A cooling system is repeatedly starting and stopping during mild
weather, resulting in poor humidity control and increased
equipment wear. The contractor determines that the installed unit
is substantially oversized for the actual load. What is the most likely
explanation for these operating problems?
A. Oversized equipment generally operates continuously and removes
excessive moisture.
B. Oversized equipment may satisfy the thermostat quickly, causing short
cycling and insufficient operating time for effective dehumidification.
C. Oversized equipment always reduces compressor starts and improves
, efficiency.
D. Equipment size has no effect on cycling behavior.
Answer: B
Rationale: Oversized cooling equipment can reduce run time because it
reaches the thermostat setpoint rapidly. Short cycles may prevent
adequate moisture removal and increase compressor and electrical
component wear.
5. A contractor is evaluating airflow through a supply duct system. If
the cross-sectional area of a duct is reduced while the required
airflow remains unchanged, what generally happens to air velocity?
A. Air velocity decreases because the duct is smaller.
B. Air velocity remains unchanged because airflow volume is constant.
C. Air velocity increases because the same airflow must pass through a
smaller area.
D. Air velocity becomes zero unless additional return ducts are installed.
Answer: C
Rationale: Air velocity is related to volumetric airflow divided by duct
cross-sectional area. For the same airflow quantity, reducing the area
increases velocity, which may also increase pressure loss and noise.
6. A duct system has excessive resistance caused by undersized ducts,
numerous sharp fittings, and restrictive accessories. What effect will
excessive external static pressure most likely have on a properly
operating blower?
