HVAC Certification Practice Tests Exam Q&A

HVAC Certification Practice Tests Exam Q&A Propane and Butane are _______ than air: - CORRECT ANSWER-Heavier What will be the resistance in the circuit if the supply voltage is 30V and current flowing through the circuit is 5A - CORRECT ANSWER-6 ohms Temperature at which oil starts to produce a waxy substance that may interfere with the refrigeration system - CORRECT ANSWER-Floc point What manifold gauge set is used to charge, evacuate, add oil and recover refrigerant from a refrigeration and air conditioning system? - CORRECT ANSWER-Yellow hose Where is the oil separator located? - CORRECT ANSWER-Discharge line Higher the ambient temperatures, ____ will be the evacuation time of the refrigerants from the system - CORRECT ANSWER-Lesser 1 Watt is equal to - CORRECT ANSWER-3.41 Btu's Heat that is absorbed or extracted when a substance changes its state is - CORRECT ANSWER-Latent heat Where is the sight glass present in the refrigeration cycle? - CORRECT ANSWERLiquid line Which shall not be used near flammable materials? - CORRECT ANSWER-Halide leak detecto