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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. 1k.Cal = _____ BTU

2. Motor draws _____ current compared to normal rated current when it is supplied by lower voltage:

3. While discussing abut the human comfort, the temperature that is most commonly referred is:

4. In cooling towers, total heat transferred is the sum of which of the following:

5. In a linear bilateral circuit voltage applied across the circuit is _______ to the current flowing through the circuit

6. Turning the TXV valve stem in _______ direction increases super heat:

7. When the liquid in the refrigeration system is sub-cooled, there will be change in pressure:

8. Semiconductors in their pure state do not conduct electricity well

9. Thermisters can have _____ temperature coefficient

10. Approximately _____ voltage is required for creating a spark on a spark ignition system:

11. Which of the following can cause refrigerant gauges to act erratically

12. Oil used in the refrigeration system should have low dielectric strength:

13. In Psychrometric chart Y-axis indicates which of the following:

14. The difference between the dry-bulb and wet-bulb temperatures is called the ______ :

15. Which of the following is used to measure the pressure drop across the air filter:

16. Refrigerant gas is lighter than air:

17. Brake horsepower (bhp) on the fan motor will vary ______ of the rpm ratio:

18. For every 1000 feet above sea level,the capacity of a natural gas furnace is de-rated by _______

19. If the branch circuit also feeds lighting units or other appliances, the total load of the air conditioner shall not exceed _______ percent of the current rating of the circuit.

20. In a series circuit _____ flowing through the circuit remains same

21. Doubling of duct diameter will reduce friction loss by a factor of _____ times

22. _______ Heat that can be measured or felt

23. _____ is a combination of both sensible heat and latent heat:

24. Screw compressors have almost nonlinear capacity control mechanism:

25. HEPA filter is designed to remove microbial and biological contaminants and can trap particles down to ______ size: