EXAM (ENTRY-LEVEL) QUESTION AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. The primary purpose of an HVACR system is to
A. Control lighting levels
B. Improve building aesthetics
C. Control temperature, humidity, and air quality
D. Reduce electrical consumption only
Answer: C
Rationale: HVACR systems are designed to regulate indoor temperature,
humidity, and air quality for comfort and safety.
2. Which unit is used to measure temperature?
A. Pascal
B. Watt
C. Degree Celsius
D. Ampere
Answer: C
Rationale: Temperature is measured in degrees such as Celsius or
Fahrenheit.
3. Heat naturally flows from
A. Cold to hot
B. Low pressure to high pressure
C. Hot to cold
D. Solid to gas
Answer: C
, Rationale: Heat always transfers from a higher temperature object to a
lower temperature one.
4. Sensible heat refers to heat that
A. Changes moisture content
B. Changes temperature without phase change
C. Causes evaporation
D. Is hidden
Answer: B
Rationale: Sensible heat affects temperature only and can be sensed with
a thermometer.
5. Latent heat is associated with
A. Temperature change
B. Phase change
C. Pressure change
D. Air movement
Answer: B
Rationale: Latent heat causes a change of state without changing
temperature.
6. Which law states energy cannot be created or destroyed?
A. Boyle’s Law
B. Charles’ Law
C. First Law of Thermodynamics
D. Second Law of Thermodynamics
Answer: C
Rationale: The first law defines conservation of energy.
7. The SI unit of pressure is
A. Bar
B. PSI
C. Pascal
D. Torr
Answer: C
Rationale: Pascal is the standard SI unit for pressure.
, 8. Which refrigerant property allows heat absorption during evaporation?
A. Density
B. Latent heat of vaporization
C. Color
D. Toxicity
Answer: B
Rationale: Refrigerants absorb large amounts of heat when changing
from liquid to vapor.
9. The four main components of a vapor-compression system are compressor,
condenser, expansion device, and
A. Fan
B. Filter dryer
C. Evaporator
D. Receiver
Answer: C
Rationale: The evaporator is where heat is absorbed from the conditioned
space.
10.The compressor’s main function is to
A. Cool refrigerant
B. Increase refrigerant pressure
C. Filter refrigerant
D. Store refrigerant
Answer: B
Rationale: Compressors raise pressure and temperature of refrigerant
vapor.
11.The condenser’s role is to
A. Absorb heat
B. Reject heat to surroundings
C. Meter refrigerant
D. Reduce pressure
Answer: B
Rationale: Condensers release heat and condense vapor into liquid.