Under normal conditions, the main source of crankcase oil contamination is attributed to （）

A、metal particles loosened by wear

B、air when air cleaners are not used

C、condensation of water vapors

D、breakdown of the lubricating oil by dilution

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更多“Under normal conditions, the main source of crankcase oil contamination is attributed to （）”相关的问题

第1题

[单选题] Adjustments to the compensating needle valve in a hydraulic governor should be made with the engine at （）

A、maximum power at a normal load B、maximum power and load under normal conditions C、half speed and normal temperature D、normal operating temperature without a load

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第2题

[单选题] （） is a precaution which contributes to avoiding trouble under normal operating conditions.

A、Constant inspection B、Keeping constant load C、Remaining constant temperature D、varying speed

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第3题

[单选题] （） is a precaution which contributes to avoiding trouble under normal operating conditions.

A、Constant inspection B、Keeping constant load C、Remaining constant temperature D、Varying speed

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第4题

[单选题] Under normal conditions, the refrigerant enters the compressor in an operating refrigeration system as a （）.

A、liquid B、dry saturated gas C、wet saturated gas D、superheated vapor

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第5题

[单选题] Which mooring line is likely to undergo the most strain when docking a ship under normal conditions?（）

A、Bow line B、Breast line C、Spring line D、Stern line

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第6题

[单选题] Under normal conditions, the quantity of air circulation becomes less and less.What is the reason?（）

A、dirty delivery ducts B、too much refrigerant C、the fouling filters D、high temperature outside

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第7题

[单选题] Under normal operating conditions, the highest temperature and pressure conditions existing in a flash-type evaporator will occur in the （）.

A、first stage B、second stage C、distillate cooler D、salt water feed heater

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第8题

[单选题] Early fuel injection timing is indicated by the cylinder pressure being（）

A、above normal with a below normal exhaust temperature B、above normal with a normal exhaust temperature C、below normal with a normal exhaust temperature D、below normal with an above normal exhaust temperature

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第9题

[单选题] Under normal weather and sea conditions when securing a stack of containers with twist locks，lashings are required when the tier exceeds what height? （）

A、Lashings are always required B、One container C、Two containers D、Three containers

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第10题

[简答题] 哪里有英语四级词汇？word版的英语四级词汇A.:normal;B.:normal;

A、A.:normal;
B.:normal;

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