轮机英语船舶动力装置章节练习(2018.01.23)

单项选择题
Which of the following can be directly obtained by means of an indicator card?（）
A.power
B.maximum pressure in a cylinder
C.mean pressure in a cylinder
D.all of the above
单项选择题
The governor of a generator engine is to （）.
A.make the engine stop
B.regulate the timing of camshafts
C.make the rpm stabilize at any required value
D.make the engine run at nearly constant speed
单项选择题
Persistent knocking in one cylinder of a diesel engine could be caused by（）.
A.a low load on that cylinder
B.sluggish piston ring action
C.excessive piston crown cooling
D.excessive clearance of piston pin
单项选择题
The lube oil in the bearings is drawn from a （）, usually located in the bedplate.
A.tank
B.sump
C.vessel
D.bottle
单项选择题
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 latter
B.latter
C.former
D.the former
单项选择题
The main bearing shells often have a thin （） of lead or indium to provide a layer giving protection against corrosion.
A.flange
B.flash
C.plate
D.sheet
单项选择题
The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the （） cycle.
A.two-stroke
B.four-stoke
C.long-stroke
D.short-stroke
单项选择题
Because the castings of smaller engines are not so big and heavy, （） and cylinder block may be made in one piece.
A.the column
B.the jacket
C.cylinder cover
D.cylinder liner
单项选择题
The cast iron（）for the cross-head are attached to the top section and seal off the crankcase.
A.cylinder cover
B.cross-head shoes
C.guide-ways
D.scavenging boxes
单项选择题
For an ordinary four-stroke engine the inlet valves open （）
A.after TDC
B.before TDC
C.after BDC
D.before BDC