问题：
[单选] The lube oil cooler is located after the lube oil filter in order for （）
the filter to operate more efficiently。the lube oil cooler to be bypassed。positive lube oil pump suction to be assured。galvanic action in the cooler to be minimized。
问题：
[单选] The highest pressure in any closed diesel engine freshwater cooling system is at the （）.
jacket water outlet。expansion tank inlet。heat exchanger inlet。cooling water pump outlet。
问题：
[单选] Improper maintenance of an automatic auxiliary boiler oil burner could result in （）.
fuel pump failure。fan motor failure。increased feedwater consumption。decreased boiler efficiency。
问题：
[单选] The bearings used to support the crankshaft are generally called （）
line shaft bearings。connecting rod beatings。main bearings。support bearing。
问题：
[单选] With respect to the flow of lubricating oil through a diesel engine, the lube oil coolers are located after filters in order to （）.
allow filtration of less viscous oil。decrease the pressure drop across the filter。improve overall filtration。all of the above。
问题：
[单选] In any diesel engine closed freshwater cooling system, the lowest pressure exists at the （）.
jacket water outlet。cooling water pump outlet。heat exchanger outlet。expansion tank atmospheric vent。
问题：
[单选] After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate refiring of a burner in order for the （）.
furnace to be re-purged。electric charge to buildup in the igniter。fuel pump to restart。dram level to stabilize。
问题：
[单选] Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the （）.
main bearings。connecting rod bearings。piston pin bushings。All of the above。
问题：
[单选] The intake valves in a diesel engine are reseated by （）.
cam followers。push rods。combustion gases。valve spring。
问题：
[单选] The main function of tie rods in the construction of large, low speed diesel engines is to（）.
stiffen the bedplate in way of the main bearings to increase the engines longitudinal strength。accept most of the tensile loading that results from the firing forces developed during operation。mount the engine frame securely to the hull to prevent shaft coupling misalignment。connect the crosshead solidly to the piston rod。
