40_Lessons_on_Refrigeration_and_Air_Conditioning_www.hvac-eng.ir_188

40_Lessons_on_Refrigeration_and_Air_Conditioning_www.hvac-eng.ir_188

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7. Which of the following statements concerning screw compressors are true? a) The capacity of a screw compressor can be varied over a large range by using the slide valve b) Compared to reciprocating compressors, screw compressors are compact for small capacities and bulky for large capacities c) An oil separator and an oil cooler are required in a screw compressor irrespective of the type of refrigerant used d) Vibration is one of the practical problems in operating screw compressors Ans.: a) and c) 8. Which of the following statements concerning scroll compressors are true:
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