What statement is true concerning the hydrostatic lubrication of plain bearings?
An outside pressure source is required for lubrication and full-film lubrication is present at any shaft speed.
An outside pressure source is not required for lubrication and full-film lubrication is present only at operational speed.
An outside pressure source is required for lubrication and full-film lubrication is present only at operational speed.
An outside pressure source is not required for lubrication and full-film lubrication is present at any shaft speed.
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