NATE Air Conditioning Installation & Service Practice Questions with Guaranteed Accurate Answers

A good evacuation of a refrigerant circuit to remove non-condensables will help insure: A.) higher condensing temperatures B.) higher suction pressures C.) low suction line pressure drop D.) higher efficiency and capacity - correct answer D.) higher efficiency and capacity A condensing unit should be mounted on a slab that is level to: A.) allow an accumulated water to evenly run out of the cabinet B.) increase airflow through the fin area C.) prevent the unit from tipping over D.) make certain any top discharge air blows straight up - correct answer A.) allow any accumulated water to evenly run out of the cabinet Low airflow over a residential split system air conditioning evaporator can cause: A.) liquid flood back to the compressor B.) a decrease in compression ratio C.) an increase in suction line superheat D.) oil logging in the evaporator - correct answer A.) liquid flood back to the compressor Which of the following is the correct sequence of work? A.) Attach the gauge manifold, recover refrigerant, replace the filter core, evacuate the system, recharge the system. B.) Recover the refrigerant, evacuate the system, replace the filter core, recharge the system. C.) Attach the gauge manifold, evacuate the system, replace the filter core, recover the refrigerant, recharge the system. D.) Attach the gauge manifold, recharge the system, evacuate the system, replace the filter core. - correct answer A.) Attach the gauge manifold, recover refrigerant, replace the filter core, evacuate the system, recharge the system. As the pressure on the liquid line is increased, the vaporization temperature of the liquid: A.) decreases B.) increases C.) remains unchanged D.) varies - correct answer B.) increases An oil separator must be mounted: A.) level B.) below the compressor crankcase C.) above the compressor crankcase D.) in the suction line - correct answer A.) level Which of the following metering devices controls evaporator pressure? A.) Th