To help release moisture from the oil in a compressor\'s crankcase? a. Heat the

Question

To help release moisture from the oil in a compressor's crankcase? a. Heat the compressor. b. Shake the compressor. c. Strike the compressor with a soft object such as a rubber mallet. d. All of the above. e. None of the above. To save time when evacuating a refrigeration system: a. Use a 2 valve, 3 hose manifold set. b. Use a 2 valve, 3 hose manifold set with a sight glass. c. Use a 4 valve, 4 hose manifold set that has a 3/8 inch hose. d. Use a 4 valve, 4 hose manifold set with a sight glass and glycerin filled gauges. c. None of the above. For maximum efficiency when evacuating systems with Schrader valves: a. Remove and discard the Schrader core. b. Use a 3/8 hoses at the 1/4 Schrader valves. c. Install piercing valves and leave them for future use. d. Use a valve core removing tool to remove and replace the Schrader valve core. c. None of the above. When evacuating a system, in order to do the best job and save time: a. Remove Schrader cores during the process. b. Use as large a hose as possible to the vacuum pump. c. Make certain the system has no closed valves such as solenoid valves. d. Run the compressor, briefly, to clear the cylinders from any trap refrigerant. e. All of the above. If you need to flush a system to sweep out contaminants. a. Use oxygen. b. Use dry nitrogen. c. Use compressed air. d. Use liquid refrigerant. e. None of the above. To clean up a dirty system, such as one that had a burn-out compressor. a. Use a vacuum pump. b. Flush with dry nitrogen. c. Install a liquid line dryer d. Install a suction line dryer. e. All of the above

Explanation / Answer

27. if you need to flush a system to sweep out contaminants .

Answer : use liquid refigerant

28. to clean up a dirty sytem ,such as one that had a vurn-out compressor.

Answer : option E : All of the above

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