NATE Core Exam Revision
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Avg score: 84% • Most missed: “Doubling of duct diameter will reduce friction loss by a factor of _____ times”
The NATE (North American Technician Excellence) Core Exam is the foundation for all NATE certifications and tests a technician's fundamental knowledge of HVACR systems. It is a 50-question, closed-book exam that covers safety, tools, basic construction, science, and electrical principles.  Here is a breakdown of the NATE Core Revision syllabus based on the Knowledge Areas of Technician Expertise (KATEs): 1. Safety Job Site Safety: OSHA standards, personal protective equipment (PPE), hazard recognition, and mitigation. Safe Procedures: Proper handling of refrigerants, lockout/tagout... Show more
NATE Core Exam Revision
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25 Questions

1. Capacitor opposes sudden changes in ______ variation:

2. As the condensing temperature increases, the capacity of the compressor:

3. The temperature of the water vapor is always the _____ the air

4. Water vapor temperature will be ______ compared to air temperature:

5. _______ is the temperature at which oil starts to produce a waxy substance that may interfere with the refrigeration system:

6. 10 deg F rise in air temperature can:

7. Which of the following pressure is required in the conditioned space to prevent the infiltration of outside air:

8. At the dew point temperature, the dry bulb is ______ wet bulb temperatures

9. In Psychrometric ________ indicates which of the following: Dew point temperature line:

10. In Boiler, Fusible plug warns against which of the following:

11. ______ is the actual weight of water vapor per unit volume of air

12. A psychrometer is used to measure _________

13. Which of the following heat can be measured directly using a thermometer:

14. Higher the suction pressure, the greater the efficiency of the _______:

15. Capacitors may be used in both AC and DC circuits

16. If the surrounding air is colder than the skin temperature, the body gains heat:

17. ______ is the flow of electrons

18. A centrifugal switch is used to take a start winding out of the circuit once the motor reaches ______ of the run speed:

19. In a purely inductive circuit, voltage waveform _______ current waveform

20. When the resistance of the measured starter coil have infinite resistance, then:

21. Gasoline is treated as which of the following:

22. The power developed by the centrifugal pump is proportional to _________ its speed:

23. Higher the discharge pressure of the air conditioning system, the compression ratio will be ______:

24. It is required that a person within a building receive _______ of ventilation air per person

25. ______ is the transfer of heat by passing from the heat source through space without heating the space in between

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