Q1) 1-Which of the following is/are The required repair, replacement, or restore action performed on a machine or a facility after the occurrence of a failure in order to bring this machine or facility to at least its minimum acceptable condition. a. Preventive Maintenance (PM) b. Run to Failure Maintenance (RTF) c. Improvement Maintenance (IM) d. All of the above. 2- Which of the following is/are A device for automatically regulating the temperature inside a refrigeration unit by controlling the operation of the compressor. a. Overload b. Automatic defrost timer C. Thermostat d. All of the above. e. 2- Which of the following is/are It aims at reducing or eliminating entirely the need for maintenance. a. Preventive Maintenance (PM) b. Run to Failure Maintenance (RTF) c. Improvement Maintenance (IM) d. All of the above