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Q4: A single-stage oil pump cannot operate in
Q8: Name four different methods for heating water
Q10: Saturated refrigerants follow a _ relationship.
Q11: _ for solar pool-heating systems are constructed
Q13: Higher efficiency condensers can operate with saturation
Q16: The technician should never block the vacuum
Q19: Which voltage do line voltage thermostats usually
Q20: Heat pump defrost is necessary in which
Q20: Electric heat may, in many cases, be
Q26: Heating thermostat contacts close on a temperature