网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
A viscous damper, as used on a marine diesel, is a sealed precision built device which dampens the torsional vibrations in the （）.
A
camshaft
B
flywheel
C
crankshaft
D
thrust shaft
参考答案
参考解析
解析：
暂无解析
更多 “单选题A viscous damper, as used on a marine diesel, is a sealed precision built device which dampens the torsional vibrations in the （）.A camshaftB flywheelC crankshaftD thrust shaft” 相关考题
考题
Plain language is usually used on marine weather______．A.forecastsB.observationsC.analysesD.Reports
考题
单选题The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.A
principleB
principalC
causeD
case
考题
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
all of the above
考题
单选题Plain language is usually used on marine weather（）.A
forecastsB
observationsC
analysesD
reports
考题
单选题Diesel oil may be used to cool （） of a diesel engine.A
cylindersB
exhaust valvesC
pistonsD
fuel valves
考题
单选题Turbocharging of marine diesel engine is achieved by two distinct methods, （） termed the constant pressure and the pulse system.A
respectableB
respectfulC
respectiveD
respectively
考题
单选题The over-speed trip installed on most diesel engine will stop the engine by shutting off the （）A
water supplyB
fuel oil supplyC
lube oil supplyD
exhaust damper
考题
单选题One of the purposes for water cooling the exhaust manifold in marine diesel engine is to （）A
reduce lube oil temperatureB
raise exhaust temperature reduceC
excessive heating of engine roomD
reduce load on cooling water pump
考题
单选题One end of a diesel engine cylinder is sealed by the cylinder head and the other end by the （）A
crankcaseB
pistonC
cylinder linerD
crank cheek
考题
单选题In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.A
inefficiencyB
oilinessC
detergencyD
purity
考题
单选题（）are used for anchor gear in marine work where the chains must withstand the corrosive effects of seawater.A
ChainsB
WiresC
RopesD
Lines
考题
单选题Marine four-stroke diesel engines are mainly （）.A
of crosshead typeB
of trunk piston typeC
of low speed typeD
all the above
考题
单选题Before a marine diesel engine is started the cylinders and pistons must be （）.A
cooled to appropriate temperatureB
warmed up gradually to appropriate temperatureC
opened up and renewedD
ground and polished
考题
单选题One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the （）A
crankcaseB
cylinder headC
valve coverD
engine frame
考题
单选题The following preparations are essential for any （） of marine diesel engine before it may be started.A
doingB
makeC
turnD
operating
考题
单选题One of the factors limiting the amount of load which can be put on a modern marine diesel engine is the （）A
governor sensitivityB
exhaust temperatureC
fuel injection pressureD
speed of the can shaft
考题
单选题Critical speeds occurring within the operating speed range of a main propulsion diesel engine may be changed, or have their damaging effects reduced by a/an （）A
engine support vibration isolatorB
detuner or viscous fluid damperC
lightened crankshaft flywheelD
spherically seated crankshaft bearing
考题
单选题（）is used for measuring horizontal and vertical angles.A
The marine sextantB
ThechronometerC
The magnetic compassD
The gyrocompass
考题
单选题（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.A
Except forB
BesideC
ExceptD
In addition to
考题
单选题Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to（）.A
reduce electrolytic action on heat exchanger metalsB
keep heat transfer surfaces shiny and cleanC
prevent rapid accumulation of marine growthD
provide a protective coating on heat exchanger surfaces
考题
单选题Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.A
leadB
forged steelC
alloy steelD
aluminum alloy
考题
单选题Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.A
cylinder coversB
lubricating spaceC
crossheadD
exhaust manifold
热门标签
最新试卷