2023 Edition

# HVAC Certification Test

HVAC Certification typically leads to professional growth and more money. The free HVAC Certification Practice Test below was written by HVAC Excellence.  It will give you an idea of the types of questions and sections on your actual exam. It is applicable to HVAC technicians and students in all 50 states.

Even if a state does not require a license to work in the field of HVACR, many technicians get certified through a professional organization. Certification ensures prospective employers and customers that a technician is knowledgeable, trained and professional.

For more comprehensive practice, check out the HVAC Practice Exam Kit - it has 300 questions with fully explained answers.

### Principles of Electrical and Refrigeration Theory

 1. What would the capacitance be if two Capacitors are wired in parallel, one having 25 mfd rating and the other having 5 mfd rating? a. 125 mfd b. 30 mfd c. 20 mfd d. 4.17 mfd
 2. An electronically commutated motor (ECM) is designed to ________. a. maintain a constant velocity b. have high starting torque c. operates at lower static pressure than axial fan motors d. provide proper air flow under various conditions
 3. If the conductor in an AC circuit is wound into a coil, the resulting EMF opposes the supply voltage. What is this opposition called? a. capacitive reactance b. conductance c. inductive reactance d. influence

### Air Conditioning

 4. A refrigerant release heat when __________. a. it is compressed b. it evaporates c. it condenses d. it vaporizes
 5. When testing the efficiency of a (10 seer are lower) air cooled condenser, the refrigerant condensing temperature should be no more than ____ higher than the entering air temperature. a. approximately 30° F b. approximately 80° F c. approximately 100° F d. approximately 5° F
Study Online Instantly
Click to Save 50% Now
 6. What is the minimum vertical drop from the outlet of the condensate drain pan to the inlet of the P trap when the evaporator is ahead of the blower? a. 9 inches b. 7 inches c. 5 inches d. 3 inches

### Commercial Air Conditioning

 7. How should metallic vibration eliminators be installed on a system which uses a reciprocating compressor? a. Perpendicular to the compressor crankshaft. b. Parallel to the compressor crankshaft. c. Vertical and in the suction line only. d. Vertical and in the discharge line only.
 8. When is the installation of a "P" trap mandatory in a drain line? a. When the evaporator coil is located after a heat exchanger. b. When the evaporator coil is located on the positive side of the blower. c. When the evaporator is an 'A' type coil. d. When the evaporator coil is located on the negative side of the blower.
 9. Why do multiple compressor systems have a balance line? a. To maintain equal loads on all compressors during operation. b. To maintain equal oil levels on all compressors. c. To compensate for different pressures. d. To compensate for evaporator pressure drop.

### Commercial Refrigeration

 10. The automatic expansion valve (AEV) maintains a constant ______ in the evaporator. a. temperature b. superheat c. liquid level d. pressure
 11. A refrigeration system used to cool another refrigeration system is called a _______. a. piggy-back system b. cascade system c. twin system d. parallel system
 12. If a pressure control has been adjusted to cut in at 30 psig, in order to have a 10 psig cut out, the differential setting of the control must be: a. 55 Psig. b. 35 Psig c. 25 Psia d. 20 Psig

### Heat Pump Service

 13. What is the industry standard for maximum duration for defrost? a. As long as it takes to get the ice off the coil. b. A maximum of 10 minutes. c. 15 minutes if the temperature is below 28°F. d. A maximum of 30 minutes.
 14. During the heating cycle the indoor coil becomes __________. a. a condenser b. an evaporator c. a receiver d. an accumulator
 15. During the heating mode, the refrigerant in the outdoor coil is under ________. a. low pressure b. high pressure c. atmospheric pressure d. a vacuum

### Heat Pump Installation

 16. Good field practice requires insulating the condensate line for at least the first ____ feet of the run from the indoor unit installed in a hot attic. a. 5 b. 10 c. 15 d. 20
 17. The vapor line on split system heat pumps between the outdoor and indoor units should be: a. uninsulated. b. insulated with 1/4 inch Armaflex or Rubbertex. c. insulated with 3/8 inch Armaflex or Rubbertex. d. insulated with 1/2 inch Armaflex or Rubbertex.
 18. To maintain efficiency, what type of control is wired in the system to prevent the auxiliary heat from coming on until needed? a. A bypass electric heat relay b. A 15 minute time delay on the 2nd stage c. An outdoor thermostat set above the balance point d. An outdoor thermostat set below the balance point

### Gas, Oil and Combustion

 19. What is the first step in the heating sequence of operation? a. Main burner ignition b. Pilot flame ignition c. Pressure switch closes d. Thermostat calls for heat
 20. The specific heat of air is: a. 0.12 BTU b. 0.24 BTU c. 0.48 BTU d. 0.98 BTU
 21. What is the approximate manifold gas pressure for a propane furnace? a. 0.25 PSI b. 7 Inches of water column c. 11 inches of water column d. 1 PSI

### Electric Heat

 22. A thermostat used on an electric heat furnace will ________. a. be a two stage thermostat. b. open on a rise / close on rise. c. open on a drop / close on rise. d. open on rise / close on a drop.
 23. What is a major cause of electrical heat element failure? a. Low airflow b. Low voltage c. High air velocity d. Open fusible link
 24. Circuit protection of _________ amps is used for each 5 kW of heat. a. 15 b. 30 c. 60 d. 100

 25. Which of the following is the reciprocal of "U" value? a. R value b. T factor c. K factor d. R=X factor
 26. Which of the following is considered an infiltration load? a. Outdoor air leaking in. b. Heat from appliances. c. Heat lost through non-porous building materials. d. Heat gain from the number of occupants.
 27. Elevation changes greater than a few hundred feet can _________. a. cause no significant change in design conditions b. significantly change the design conditions c. decrease the heating load in some instances d. usually cause a decrease in cooling and heating loads

### Universal R-410A Safety and Training

 28. Which of the following is true about Polyalkylene Glycol (PAG) Oils? a. They are non-toxic if inhaled. b. They are extremely hygroscopic. c. They perform well in aluminum-on-steel applications. d. All of the above.
 29. Technicians handling liquid refrigerant should wear gloves and ___________. a. steel-toe boots b. self contained breathing apparatus (SCUBA) c. hearing protection d. approved eye protection
 30. The receiver bypass: a. prevents subcooled liquid from sitting in the receiver and losing its sub-cooling. b. prevents superheated liquid from sitting in the receiver and losing its superheat. c. prevents subcooled vapor from sitting in the receiver and losing its sub-cooling. d. prevents subcooled liquid from sitting in the receiver and losing its superheat.

### Green Awareness

 31. Which of the following is a source of sustainable energy? a. Nuclear b. Coal c. Natural gas d. Ethanol
 32. What is the cost of electricity based on? a. Electricity consumed by the watt meter. b. Voltage used over a period of time. c. Wattage used over a period of time d. Electrons used over a period of time.
 33. How much of all the available water on the planet is fresh water? a. 2.5% b. 24% c. 67% d. 75%

Quality starts with who wrote the material.
Our practice exam writer
s
:
Written by:
HVAC Excellence

The questions are based on industry standards and offer a comprehensive coverage of the fundamental subject matter found on most HVACR certification exams.

The HVACR Practice Test Kit provides:
• assessment of broad based HVACR knowledge
• practice in the various specialty areas
• a good opportunity for practicing test taking skills and learning the subject matter

Summary of Typical HVACR Certification Exams:

What: HVACR exams are part of the certification process for HVACR technicians which identifies the scope and level of a technician's competency in core and specialty areas.

Who: HVACR professionals who wish to become certified in various HVACR specialties

Where: HVACR certification exams are typically administered at various testing centers, schools and other locations throughout the United States.

When: There are various times throughout the year so check with the exam provider for information.

Why: Certification programs improve technical competency and safety allowing technicians to demonstrate competency and earn more money.

Type: Multiple choice, in both computer-based and paper/pencil formats.

Time: Time varies. The average time is 2 hours.

Language: English

Cost: Depending on the subject and organization, it typically costs between \$25 - \$150 per actual certification exam.