（） fuel oils （） lubricating oils require treatment before passing to the engine.

[单选题]The ability of lubricating oils to resist viscosity changes during temperature changes is indicated by the ____.A．American PetroleumB．Institute number viscosity index numberC．Seconds Saybolt Furol numberD．Seconds Saybolt Universal number

[单选题]The development of oils （） the increasing demands made by the steady rise in powers produced by modem diesels.A . has kept pace withB . has kept pace toC . has made pace withD . has made pace to

[单选题]E．mulsion oils and sodium nitrite are both approved additives, but the latter cannot be used if any pipes are or if ally soldered joints exit.A．chromedB．weldedC．galvanizedD．bolted

[单选题]Emulsion oils and sodium nitrite are both approved additives, but （） cannot be used if any pipes are galvanized or if soldered joints exist.A . the latterB . latterC . formerD . the former

Food companies and restaurants choose to use trans fat oils because theyre cheap

[单选题]With respect to the flow of lubricating oil through a diesel engine, the lube oil coolers are located after filters in order to （）.A . allow filtration of less viscous oilB . decrease the pressure drop across the filterC . improve overall filtrationD

[单选题]The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in （） while that for latter one is （）.A . sufficient quantity； measuredB . measured quantity；sufficientC . excessive quantity；suff

[单选题]The function of a lubricating oil is （） to lubricate the running surface （） to carry away a great deal of heat.A . not；butB . neither；norC . either；orD . not only；but also

A The fuel injection pump B The fuel feed pump C The fuel transfer pump D The fu

[单选题]Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an _____.A．over-speed tripB．audible/visual alarmC．the ships/boats general alarmD．reserve oil storage tank