HVAC Excellence Certification Exam 2025 COMPLETE
TEST QUESTIONS & ANSWERS || 100% SOLVED &
VERIFIED || GUARANTEED PASS
Description: Comprehensive HVAC Excellence exam material featuring 100%
solved and verified questions for the 2025 version. Covers HVAC theory, electrical
components, troubleshooting, heating and cooling systems, and safety
procedures. Perfect for students and technicians seeking HVAC Excellence
certification with full accuracy.
Keywords: HVAC Excellence exam HVAC certification HVAC troubleshooting
electrical components air conditioning systems heating and cooling HVAC theory
HVAC practice test HVAC study guide technician certification Ready to level up
your document?
Section 1: Electrical Principles & Components
1. What is the unit of measurement for electrical current?
A) Volt
B) Watt
C) Ohm
D) Ampere
2. Electrical pressure, or electromotive force (EMF), is measured in:
A) Volts
B) Amps
C) Ohms
D) Farads
3. A device designed to open a circuit when current exceeds a predetermined
level is a:
,A) Contactor
B) Relay
C) Fuse or Circuit Breaker
D) Capacitor
4. What is the primary purpose of a capacitor in a compressor motor circuit?
A) To reduce voltage
B) To increase efficiency
C) To create a phase shift for starting and/or running torque
D) To protect against high pressure
5. In a standard single-phase hermetic compressor, which terminal is common to
both the run and start windings?
A) Start (S)
B) Run (R)
C) Common (C)
D) Ground (G)
6. A potential relay is typically used to:
A) Protect the motor from low voltage
B) Remove the start capacitor from the circuit once the motor reaches ~75%
speed
C) Monitor line voltage for the control circuit
D) Provide overload protection
7. What does the schematic symbol for a normally open (N.O.) contact look like?
A) A line with a diagonal cross through it
B) Two parallel lines that are not connected
C) Two parallel lines with a diagonal line connecting them
D) A circle with a cross inside
8. A thermistor is a type of:
A) Switch
B) Resistor that changes resistance with temperature
, C) Mechanical thermostat
D) Capacitor
9. The control voltage for a residential HVAC system is typically:
A) 240 VAC
B) 480 VAC
C) 24 VAC
D) 120 VAC
10. What is the function of a transformer?
A) To change AC to DC
B) To step up or step down AC voltage
C) To store electrical energy
D) To regulate current flow
11. If a compressor has an open internal overload, the technician will measure:
A) Low resistance
B) Infinite resistance (OL)
C) Zero resistance
D) Fluctuating resistance
12. A "shorted" winding in a motor will typically show:
A) Higher than normal resistance
B) Lower than normal resistance
C) Infinite resistance
D) The correct resistance
13. The purpose of a crankcase heater is to:
A) Keep the compressor warm for comfort
B) Prevent refrigerant migration and liquid slugging
C) Increase the compressor's efficiency
D) Reduce the amp draw on start-up
14. A low-pressure switch is connected in ________ with the contactor coil.
A) Parallel
TEST QUESTIONS & ANSWERS || 100% SOLVED &
VERIFIED || GUARANTEED PASS
Description: Comprehensive HVAC Excellence exam material featuring 100%
solved and verified questions for the 2025 version. Covers HVAC theory, electrical
components, troubleshooting, heating and cooling systems, and safety
procedures. Perfect for students and technicians seeking HVAC Excellence
certification with full accuracy.
Keywords: HVAC Excellence exam HVAC certification HVAC troubleshooting
electrical components air conditioning systems heating and cooling HVAC theory
HVAC practice test HVAC study guide technician certification Ready to level up
your document?
Section 1: Electrical Principles & Components
1. What is the unit of measurement for electrical current?
A) Volt
B) Watt
C) Ohm
D) Ampere
2. Electrical pressure, or electromotive force (EMF), is measured in:
A) Volts
B) Amps
C) Ohms
D) Farads
3. A device designed to open a circuit when current exceeds a predetermined
level is a:
,A) Contactor
B) Relay
C) Fuse or Circuit Breaker
D) Capacitor
4. What is the primary purpose of a capacitor in a compressor motor circuit?
A) To reduce voltage
B) To increase efficiency
C) To create a phase shift for starting and/or running torque
D) To protect against high pressure
5. In a standard single-phase hermetic compressor, which terminal is common to
both the run and start windings?
A) Start (S)
B) Run (R)
C) Common (C)
D) Ground (G)
6. A potential relay is typically used to:
A) Protect the motor from low voltage
B) Remove the start capacitor from the circuit once the motor reaches ~75%
speed
C) Monitor line voltage for the control circuit
D) Provide overload protection
7. What does the schematic symbol for a normally open (N.O.) contact look like?
A) A line with a diagonal cross through it
B) Two parallel lines that are not connected
C) Two parallel lines with a diagonal line connecting them
D) A circle with a cross inside
8. A thermistor is a type of:
A) Switch
B) Resistor that changes resistance with temperature
, C) Mechanical thermostat
D) Capacitor
9. The control voltage for a residential HVAC system is typically:
A) 240 VAC
B) 480 VAC
C) 24 VAC
D) 120 VAC
10. What is the function of a transformer?
A) To change AC to DC
B) To step up or step down AC voltage
C) To store electrical energy
D) To regulate current flow
11. If a compressor has an open internal overload, the technician will measure:
A) Low resistance
B) Infinite resistance (OL)
C) Zero resistance
D) Fluctuating resistance
12. A "shorted" winding in a motor will typically show:
A) Higher than normal resistance
B) Lower than normal resistance
C) Infinite resistance
D) The correct resistance
13. The purpose of a crankcase heater is to:
A) Keep the compressor warm for comfort
B) Prevent refrigerant migration and liquid slugging
C) Increase the compressor's efficiency
D) Reduce the amp draw on start-up
14. A low-pressure switch is connected in ________ with the contactor coil.
A) Parallel
