Technician A says chlorine in CFC-12 (R-12) refrigerant may destroy ozone molecules for over a century. Technician B says O3 is destroyed and created by UV radiation. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: C
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What is the total system charge for a system with a factory charge of 56 oz of R-410A, an assumed length of 15 ft, and a 3/8 in liquid line that is 35 ft long?
A) 56 oz B) 56 oz + 12 oz = 68 oz C) (35 - 15 ) × 0.6 = 12 oz D) 56 oz + 21 oz = 77 oz
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A heat sink is a device to improve the purity of the electrons in an electrical circuit.
Answer the following statement true (T) or false (F)
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Animal health technologists work side by side with _____
a. entomologists c. veterinarians b. microbiologists d. ecologists
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When the exhaust is rich, the PCM applies a ________ current into the pump cell
A) Neutral B) Positive C) Negative D) None of these
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