NATE air to air heat pump 4 heat pumps with 100% correct answers

The primary function of a reversing valve is to... Switch between heating and cooling A typical 4 way reversing valve has 3 ports on one side of the valve body, and a single port on the opposite side of the valve body. To what is this single port connected? The discharge line Of the three ports on one side of the reversing valve's body, to what is the center port connected? The accumulator If a heat pump system is low on charge, then the reversing valve... Is less likely to slide If a reversing valve is leaking under the side, then... The pressures will equalize Most defrost requirements occur at what outdoor temperature? Between 35 and 45 The ambient temperature sensor for a heat pump's defrost system should be located... In the inlet air stream to the outdoor unit If a heat pump's defrost system is initiated by temperature difference, then as the outdoor coil ices up... The temperature difference increases to initiation If a heat pump's defrost system is initiated by pressure difference, then as the outdoor coil ices up... The pressure difference increases to initiation Once defrost is initiated, what else usually happens? All of the above: outdoor fan is shut off, the reversing valve is switched to the cooling mode, emergency heat strips are energized The balance point of a heat pump can best be described as... The point at which the building's heat loss equals the heat pump's ability to provide heat The outdoor unit must be located so that... All of the above: roof run off is avoided, defrost water can drain away, is elevated above snow drifts. Packaged heat pumps are... Less expensive than split units The single most important consideration for a packaged heat pump to be mounted on a roof is... Can the roof support the weight of the unit? To avoid noise transmission from a packaged heat pump on a roof... Be sure to install the curb gasket On a typical two stage heat pump thermostat, the first stage brings on the heat pump, and the second stage energizes... The first stage of auxiliary heat If the thermostat's system switch is set to AUTO, then... The system will go into either heating, or cooling as the demand imdicates Why do some thermostats have a "C" terminal on their subbases that must be connected? Both sides of power are required to light the lights and the display The heating anticipator is set... To match the amp draw of the heating circuit An add on heat pump requires the addition of a control that will... Not allow the heat pump and the furnace to operate simultaneously in the heating mode Why would a low pressure switch be placed in the low side of a heat pump? To sense the loss of a charge Electronic air cleaners... All of the above: improve IAQ, remove air borne contaminants, operate at voltages in excess of 5000 VDC An electronic air cleaner cannot remove... Odors An air cleaner begins to become clogged... It becomes more efficient An untrapped condensate drain line that is located on the inlet side of the blower will... Not allow the water to drain from the pan until the fan shuts off What will mitigate the damages associated with the problems encountered (in question #25 above) with an untrapped condensate drain line that will not allow the water to drain from the pan until the fan shuts off? Float activated switch in the pan drain Sensible heat is... Heat that causes a change in dry bulb temperature Latent heat can be measured using... None of the above: a dry bulb thermometer, a wet bulb thermometer, a hygrometer Sensible heat ratio is... Sensible heat / total heat After using ACCA's manual J to calculate the heat loss and heat gain of a residential structure, you would then use which of the following to choose a heat pump? The heat gain A gage reading of 30 psi equates to... 44.7 psia An evacuation of a split system heat pump is considered complete at... 500 microns