Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg ?
Correct answer: C. 0.01
- A. 1
- B. 0.1
- C. 0.01
- D. 0.001
Explanation
Oil-sealed rotary vacuum pumps are commonly capable of reaching an absolute pressure of about 0.01 mm Hg in the range intended by this question. The attainable limit depends on pump design, oil condition, leakage, and gas load.
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