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[{"id":519891,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:51:08","updated_at":"2018-08-12 12:42:14","questionName":"When performing refrigerant system service on a unit that has a _________ tank, refrigerant should be placed in the receiver. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":13,"explanation":"When performing refrigerant system service on a unit that has a receiver\/storage tank, refrigerant should be placed in the receiver. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519868,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:07:04","updated_at":"2018-08-12 12:42:14","questionName":"After the installation of any type of system, the unit should first be pressurized with nitrogen (an inert gas) but not leak checked. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":0,"explanation":"After the installation of any type of system, the unit should first be pressurized with nitrogen (an inert gas) and leak checked. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519884,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:38:01","updated_at":"2018-08-12 12:42:14","questionName":"Both recycling and recovery equipment using hermetic compressors have the potential to _______when drawing a deep vacuum because the unit relies on the flow of refrigerant through the compressor for cooling. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":7,"explanation":"Both recycling and recovery equipment using hermetic compressors have the potential to overheat when drawing a deep vacuum because the unit relies on the flow of refrigerant through the compressor for cooling. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519870,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:11:08","updated_at":"2018-08-12 12:42:14","questionName":"A refrigeration unit using an open compressor that has not been used in several months is not likely to leak from the rotating shaft seal. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":1,"explanation":"A refrigeration unit using an open compressor that has not been used in several months is likely to leak from the rotating shaft seal. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519887,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:46:13","updated_at":"2018-08-12 12:42:14","questionName":"Recovering refrigerant in the vapor phase will minimize the loss of oil, but recovering as much as possible in the liquid phase can reduce recovery time. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":10,"explanation":"Recovering refrigerant in the vapor phase will minimize the loss of oil, but recovering as much as possible in the liquid phase can reduce recovery time. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519892,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:52:48","updated_at":"2018-08-12 12:42:14","questionName":"After recovery, the refrigerant may be returned to the appliance from which it was removed or to another appliance owned by the same person without being recycled or reclaimed, unless the appliance is an MVAC like appliance. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":14,"explanation":"After recovery, the refrigerant may be returned to the appliance from which it was removed or to another appliance owned by the same person without being recycled or reclaimed, unless the appliance is an MVAC like appliance. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519883,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:35:51","updated_at":"2018-08-12 12:42:14","questionName":"Recovered refrigerants may contain acids, moisture, and oil. It is, therefore, necessary to frequently check and change both the oil and filter on a recycling machine. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":6,"explanation":"Recovered refrigerants may contain acids, moisture, and oil. It is, therefore, necessary to frequently check and change both the oil and filter on a recycling machine. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519881,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:33:23","updated_at":"2018-08-12 12:42:14","questionName":"EPA regulations require that all commercial and industrial process refrigeration containing more than 50lbs of refrigerant must be repaired when the annual leak rate exceeds ____. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":5,"explanation":"EPA regulations require that all commercial and industrial process refrigeration containing more than 50lbs of refrigerant must be repaired when the annual leak rate exceeds 35%. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519888,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:47:22","updated_at":"2018-08-12 12:42:14","questionName":"The technician should not choose to speed up the recovery process by packing the recovery cylinder in ice and\/or applying heat to the appliance. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":11,"explanation":"The technician may choose to speed up the recovery process by packing the recovery cylinder in ice and\/or applying heat to the appliance. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519889,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:48:18","updated_at":"2018-08-12 12:42:14","questionName":"After recovering liquid refrigerant, any remaining vapor is condensed by the recovery system. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":12,"explanation":"After recovering liquid refrigerant, any remaining vapor is condensed by the recovery system. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519871,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:12:00","updated_at":"2018-08-12 12:42:14","questionName":"During a visual inspection of any type of system, traces of oil are an indicator of a refrigerant leak.","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":2,"explanation":"During a visual inspection of any type of system, traces of oil are an indicator of a refrigerant leak.","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519885,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:42:03","updated_at":"2018-08-12 12:42:14","questionName":"Before using a recovery unit you should always check the ______________ and____________ from the unit\u2019s receiver. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":8,"explanation":"Before using a recovery unit you should always check the service valve positions, the oil level of the recovery unit, and evacuate and recover any remaining refrigerant from the unit\u2019s receiver.","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519873,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:12:58","updated_at":"2018-08-12 12:42:14","questionName":"Excessive superheat, caused by a low refrigerant charge, is not an indication or a leak in a high-pressure system.","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":3,"explanation":"Excessive superheat, caused by a low refrigerant charge, is also an indication or a leak in a high-pressure system.","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519886,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:44:54","updated_at":"2018-08-12 12:42:14","questionName":"Before recovering and\/or recycling __________ refrigerant, you must purge the recover\/recycle equipment by recovering as much of the first refrigerant as possible, change the filter and evacuate. The only exception to this rule is for technicians working with R-134a who must provide a special type of hoses, gauges, vacuum pump, recovery or recycling machine, and oil containers to be used with R-134a. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":9,"explanation":"Before recovering and\/or recycling a different refrigerant, you must purge the recover\/recycle equipment by recovering as much of the first refrigerant as possible, change the filter and evacuate. The only exception to this rule is for technicians working with R-134a who must provide a special type of hoses, gauges, vacuum pump, recovery or recycling machine, and oil containers to be used with R-134a. ","question_score_id":null,"lang":"","questionAudioPath":null},{"id":519880,"quiz_id":"26465","answer_id":null,"answerType_id":"0","created_at":"2018-08-10 02:30:50","updated_at":"2018-08-12 12:42:14","questionName":"EPA regulations require that all comfort cooling appliances containing more than 50lbs of refrigerant must be repaired when the annual leak rate exceeds _____. ","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":4,"explanation":"EPA regulations require that all comfort cooling appliances containing more than 50lbs of refrigerant must be repaired when the annual leak rate exceeds 15%. ","question_score_id":null,"lang":"","questionAudioPath":null}]