轮机英语船舶动力装置章节练习(2018.01.08)

单项选择题
The removal of （） from lubricating oil will reduce engine wear and possible breakdowns.
A.contaminating water
B.contaminated additives
C.contaminated fuel
D.contaminating impurities
单项选择题
The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler （）
A.salinity is abnormally high
B.steam demand is too high
C.water level is abnormally low
D.feedwater flow is low
单项选择题
The PRIMARY function of a waste heat boiler is to （）
A.reduce engine exhaust noise
B.reduce engine back pressure
C.recover heat which otherwise would be lost
D.increase turbocharger efficiency
单项选择题
It is well known that good lubrication will （） the bearings from becoming overheated.
A.present
B.prevent
C.avoid
D.provide
单项选择题
The （） is not properly set thus causing either advanced or retarded firing.
A.piston
B.fuel injection pump
C.crankshaft
D.oil can
单项选择题
The abbreviation TDC means （）.
A.top dead center
B.temperature difference center
C.time delay dock
D.top diesel company
单项选择题
The cylinder covers and the liners are bolted together by means of （）.
A.bolts welded into the cylinder head
B.bolts welded into the cylinder frames
C.studs screwed into the cylinder head
D.studs screwed into the cylinder frames
单项选择题
What is the term given to the process of breaking up fuel oil into very fine particles for better combustion?（）
A.Settling
B.Straining
C.Spraying
D.Atomizing
单项选择题
The external circumference of a pair of main bearing shells is slightly larger than that of the bore of the housing which receives themThe difference is termed （）.
A.nip
B.nap
C.gap
D.lip
单项选择题
The pumps employed on board ship can be divided into two main categories ie（） pumps and centrifugal pumps.
A.gear
B.nonpositive displacement
C.positive displacement
D.rotary