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輪機(jī)英語(yǔ)船舶動(dòng)力裝置章節(jié)練習(xí)(2018.01.23)

單項(xiàng)選擇題
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
單項(xiàng)選擇題
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
單項(xiàng)選擇題
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
單項(xiàng)選擇題
The lube oil in the bearings is drawn from a （）, usually located in the bedplate.
A.tank
B.sump
C.vessel
D.bottle
單項(xiàng)選擇題
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
單項(xiàng)選擇題
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
單項(xiàng)選擇題
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
單項(xiàng)選擇題
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
單項(xiàng)選擇題
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
單項(xiàng)選擇題
For an ordinary four-stroke engine the inlet valves open （）
A.after TDC
B.before TDC
C.after BDC
D.before BDC

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