A. Water and air cooling
B. Oil cooling and air cooling
C. Water cooling and oil cooling
D. unable to determine
Answer: A
Analysis: The cooling system of oil-injected air compressors usually includes two types: water-cooled and air-cooled, which are used to cool the compressor and compress air.
A.≤0℃ B.≤-10℃ C.≤-20℃ D.≤-30℃ Answer: C Analysis: The spraying process requires a compressed air dew point of ≤-20℃ (PDP) to prevent moisture condensation from affecting the coating quality.
Answer: The main features include energy efficiency, low pressure operation, oil-free water lubrication, and high reliability.
Answer: The GWL Series compressor adopts a low-noise design, with a noise level typically below industry standards, depending on the model and operating conditions.
A. Annex B B. Annex C C. Annex D D. Annex E Answer: C Analysis: The gas production standard corresponds to ISO 1217 Annex D.
A. Produce lubricating oil B. No lubricating oil C. Need to replace lubricating oil frequently D. High noise answer: B. No production of lubricating oil