航海基礎英語學習通超星課后章節答案期末考試題庫2023年____areincreasinglyusedasmainengineonmerchantvessels,becausetheyhaveahighHp/Weightratio.

參考答案:

Medium-speeddieselengines

_____canbefoundonmostmediumtolargemerchantvesselsevenifthemainengineiseitherasteamturbineor2-strokecrossheadengine.

參考答案:

Themediumspeed4-stroketrunkpistonengine

_____,sotheyarewidelyusedonboardshipnowadays.

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Dieselengineshavemoreadvantagesincomparisonwithgasolineengines

Adieselengineisoperatingat1800rpm.Whatkindofdieselisit?

參考答案:

highspeed

Adieselenginewhichisratedfornormaloperationatacrankshaftspeedof800RPM,iscommonlyclassedasa______.

參考答案:

medium-speeddiesel

Apistoninafour-stroke/cycledieselenginemakesfourstrokesduringeach_____.

參考答案:

workingcycleofoperation

Ashipdesignedforcarryinggoodsrequiringrefrigerationiscalled______.

參考答案:

REEFER

Dieselenginesinsteadsofsteamengineswereusedasmainengineonboardshipsismainlybecause____.

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theyhaveahighthermalefficiency

Dueto_____actionofpistonssomerelativemotionbetweenpartsincontactinthecoolantsupplyandreturnsystemmustoccur.

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reciprocating

Inthesuctionstrokeairisinducedintothecylinder_____Inthecompressionstroketheairiscompressed.

參考答案:

throughaninletvalve

Sincetheburningorcombustiontakesplacewithintheengineitself,theengineisknownas_____.

參考答案:

aninternalcombustionengine

Theabbreviation‘M/E’isusedtorepresentthe

參考答案:

mainengine

Thedieselengineisatypeof_____.

參考答案:

internalcombustionengine

Thefour-strokeengineisusedforalternatorandsometimesformainpropulsionwitha_____toprovideapropellerspeedofbetween90to120rev/min.

參考答案:

gearbox

Thepistonmovesupanddown,thuscausingtherotationalmovementofthe_____.

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crankshaft

Therotarymotionofadieselenginecrankshaftisobtainedfromtheupanddownmotionofthepistonviathe_____.

參考答案:

connectingorpistonrod

Theslowspeedmainenginepropulsiondieseloperatesontwo-strokecycle.Atthislowspeedtheenginerequiresnoreductiongearboxbetweenitand____.

參考答案:

propeller

Theslowspeedmainpropulsiondieselusullyoperateson____.

參考答案:

thetwo-strokecycle

Theterm_____referstoonecompletesequenceofoperationsrequiredtoproducepowerinanengine.

參考答案:

cycle

Thetermmediumsp