Which of the following has the maximum compression ratio ?
Correct answer: C. Vacuum pump
- A. Blower
- B. Compressor
- C. Vacuum pump
- D. Fan
Explanation
A vacuum pump can produce a very low suction pressure while discharging near atmospheric pressure, giving a larger pressure ratio than ordinary fans, blowers, or compressors in this comparison. The exact ratio depends on the pump and operating conditions.
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