These acid residues must be prevented from entering the crankcase, otherwise the lube oil would be()
A、contaminated
B、emulsified
C、deteriorated
D、oxidated
A、contaminated
B、emulsified
C、deteriorated
D、oxidated
A、Ash content, carbon residue, and gravity B、Viscosity, acidity, and demulsibility C、Pour point, flash, point, and precipitation number D、Auto-ignition point, viscosity index, and film strength
A、A.acids or alkalies B、B.diesel oil C、C.acids, but not alkalies D、D.alkalies, but not acids
A、A.Each of the cargoes must be segregated from the other by at least two barriers B、B.The minimum protective clothing required for taking samples of phosphoric acid is goggles or a face shield C、C.Aluminum,copper,and zinc are prohibited in all valve parts in contact with these cargoes D、D.The required warning sign must have the legend "cancer hazard" added to it