HVAC CONTRACTOR EXAM QUESTIONS AND ANSWERS
An instrument that measures potential differences between 2 points in an electrical circuit is called? A. potentiometer B. thermistor C. ohmeter D. voltmeter - ans-voltmeter This device uses a thermal sensing bulb at the outlet of the evaporator to sense temperature and control superheat A. automatic expansion valve B. thermostatic expansion valve C. low side float D. schraeder valve - ans-thermostatic expansion valve when installing a reversing valve on a heat pump, how many brazed joints should be made? a. 3 b. 5 c. 4 d. 2 - ans-4
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- Publié le
- 5 avril 2024
- Nombre de pages
- 26
- Écrit en
- 2023/2024
- Type
- Examen
- Contient
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hvac contractor exam questions and answers
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