航海基础英语学习通超星课后章节答案期末考试题库2023年

航海基础英语学习通超星课后章节答案期末考试题库2023年____areincreasinglyusedasmainengineonmerchantvessels,becausetheyhaveahighHp/Weightratio.

参考答案:

Medium-speeddieselengines

_____canbefoundonmostmediumtolargemerchantvesselsevenifthemainengineiseitherasteamturbineor2-strokecrossheadengine.

参考答案:

Themediumspeed4-stroketrunkpistonengine

_____,sotheyarewidelyusedonboardshipnowadays.

参考答案:

Dieselengineshavemoreadvantagesincomparisonwithgasolineengines

Adieselengineisoperatingat1800rpm.Whatkindofdieselisit?

参考答案:

highspeed

Adieselenginewhichisratedfornormaloperationatacrankshaftspeedof800RPM,iscommonlyclassedasa______.

参考答案:

medium-speeddiesel

Apistoninafour-stroke/cycledieselenginemakesfourstrokesduringeach_____.

参考答案:

workingcycleofoperation

Ashipdesignedforcarryinggoodsrequiringrefrigerationiscalled______.

参考答案:

REEFER

Dieselenginesinsteadsofsteamengineswereusedasmainengineonboardshipsismainlybecause____.

参考答案:

theyhaveahighthermalefficiency

Dueto_____actionofpistonssomerelativemotionbetweenpartsincontactinthecoolantsupplyandreturnsystemmustoccur.

参考答案:

reciprocating

Inthesuctionstrokeairisinducedintothecylinder_____Inthecompressionstroketheairiscompressed.

参考答案:

throughaninletvalve

Sincetheburningorcombustiontakesplacewithintheengineitself,theengineisknownas_____.

参考答案:

aninternalcombustionengine

Theabbreviation‘M/E’isusedtorepresentthe

参考答案:

mainengine

Thedieselengineisatypeof_____.

参考答案:

internalcombustionengine

Thefour-strokeengineisusedforalternatorandsometimesformainpropulsionwitha_____toprovideapropellerspeedofbetween90to120rev/min.

参考答案:

gearbox

Thepistonmovesupanddown,thuscausingtherotationalmovementofthe_____.

参考答案:

crankshaft

Therotarymotionofadieselenginecrankshaftisobtainedfromtheupanddownmotionofthepistonviathe_____.

参考答案:

connectingorpistonrod

Theslowspeedmainenginepropulsiondieseloperatesontwo-strokecycle.Atthislowspeedtheenginerequiresnoreductiongearboxbetweenitand____.

参考答案:

propeller

Theslowspeedmainpropulsiondieselusullyoperateson____.

参考答案:

thetwo-strokecycle

Theterm_____referstoonecompletesequenceofoperationsrequiredtoproducepowerinanengine.

参考答案:

cycle

Thetermmediumsp