The pressure differential across a diesel engine lube oil system duplex filter should be checked to ________.

A．determine the need for filter cleaning

B．measure any change in oil viscosity

C．prevent damage to the filter

D．determine the need for batch filtration

[单选题]An increased pressure differential between the inlet and outlet of a strainer usually indicates the strainer is （）A . holedB . fouledC . cleanD . dry

[单选题]Increasing differential pressure of an oil filter indicates that （）A . it is dirtyB . it is leakyC . it has been renewedD . all the above

[单选题]The highest pressure in any closed diesel engine freshwater cooling system is at the （）.A . jacket water outletB . expansion tank inletC . heat exchanger inletD . cooling water pump outlet

[单选题]A． magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles ofA．waterB．babbittC．iron or steelD．acids

[单选题]C．rankcase explosions in propulsion diesel engines result fromA．the splashing of lubrication oil by the crankshaftB．the dilution of crankcase oil with particles of combustionC．broken fuel lines spraying oil on the crankcaseD．the ignition of unburned

[单选题]C．rankcase explosions in propulsion diesel engines result from ____.A．the splashing of lubrication oil by the crankshaftB．the dilution of crankcase oil with particles of combustionC．broken fuel lines spraying oil on the crankcaseD．the ignition of unb

[单选题]The power output of a turbocharged diesel engine will drop if the cooling water flow through the after-cooler is interrupted because the （）.A . turbocharger stallsB . exhaust pressure increasesC . air charge density decreasesD . scavenge effect incre

[单选题]A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of（）.A . waterB . babbittC . iron or steelD . acid

[名词解释] differential inhibition（分化抑制）

[名词解释] differential centrifugation （差速离心）