HVAC AC FINALS Correct Questions & Answers!

What is the relative humidity if the dry-bulb temperature is 100 f and the wet bulb temperature is 65 F - ANSWER 13% What is the dew-point temperature if the wet bulb temperature is 65°F and the dry but temperature is 100°F - ANSWER 40°F The wet-bulb and grab of temperature are both 80°F, what is the humidity? - ANSWER 100% If the dry-bulb temperature is 93°F and the wetbulb temperature is 60°F, what is the specific volume of air? - ANSWER 14.0 ft.³/lb The density of air is the ____. - ANSWER Weight of their per cubic feet Are characteristics charts and tables are based on a sea-level pressure of_____. - ANSWER 29.92 " HG The drab up temperature is the ___. - ANSWER Sensible heat level of the air The wet-bulb temperature ___. - ANSWER takes into account the moisture content of the air The dew-point temperature is the___. - ANSWER temperature when the moisture begins to condense out of the air What is psychometrics? - ANSWER study of a level of comfort base on db/wb ,Rh, Enthalpy , On the when the dry bulb and the wet-bulb temperatures by the same, the relative humidity of the air is 100% - ANSWER under what conditions would a package air-conditioning system needs to be charged? - ANSWER during compressor replacement, see. Discharge and liquid on a package air-conditioning system, which refrigerant field installed? - ANSWER no lines need to be installed. On a split air conditioning system with a remote condensing unit, which refrigerant lines must be field installed? - ANSWER liquid and suction lines The solar load on a structure is the heat gain resulting from the _____. - ANSWER heat from the radiation from the sun The total heat content of infiltrated air of the same dry-bulb temperature may vary from one part of the country to another because of difference in _____. - ANSWER humidity More than one evaporator coil circuit is used when _____. - ANSWER there would be excessive refrigerant pressure drop in the coil circuit in older rotary type motor compressor assemblies, the motor is cooled by_____. - ANSWER air over the shell of the assembly high-efficiency condensers___________. - ANSWER have more surface area than standard condensers the most popular material combination used in air-conditioning evaporators and condensers is_____. - ANSWER copper tub - aluminum fin the dry - bub temperature is the_______. - ANSWER sensible heat level of the air the wet - bulb temperature_______. - ANSWER takes into account the moisture content of the air