ASE Study Guide Practice Test questions with correct answers

True or False. Chlorine was found to do damage to the ozone layer? - Answer True True or False. Different refrigerant are ok to be mixed together. Pressure characteristics are a little bit different but should not matter. - Answer False. High pressure characteristics between R12 and R134a vary considerably. Will result in high head pressure and high system. A vehicle has poor air conditioning performance. The customer has added R134a refrigerant to the system. Technician A says to use a refrigerant identifier. Technician B says refrigerant mixtures are not recommended, but will not affect system pressures. Who is correct? A. Tech A B. Tech B C. Both D. Neither - Answer Tech A is correct A squeal is heard only when the compressor clutch first engages. Technician A says this is caused by a loose serpentine belt. Technician B says this is caused by a worn clutch pulley bearing. Who is correct? A. Tech A B. Tech B C. Both D. Neither - Answer Tech is correct