What is meant by the coil split? Select one: A. The temperature difference between the coil operating temperature and the air passing over the coil B. An opening at the seam in the copper tubing C. The dividing point in an evaporator between high-side pressure and low-side pressure D. The part of an A-coil evaporator where the two halves are joined Clear my choice Question 7 Not yet answered Points out of 1.00 Not flaggedFlag question Question text A high temperature differential (more than 2 degrees) between return air temperature at the grille and the return air temperature at the unit indicates: Select one: A. Low refrigerant charge. B. Dirty evaporator coil. C. Clogged liquid line. D. Return air leakage. Clear my choice Question 8 Not yet answered Points out of 1.00 Not flaggedFlag question Question text Three general areas of problems in air-conditioning systems include electrical problems, mechanical problems, and: Select one: A. Undercharge problems. B. Airflow problems. C. Wiring problems. D. Communication problems