海船船员考试

单选题Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）A Flash point improversB Pour point improversC InhibitorsD Foam suppressors

题目
单选题
Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）
A

Flash point improvers

B

Pour point improvers

C

Inhibitors

D

Foam suppressors

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相似问题和答案

第1题：

Lubrication for the main reduction gears used with diesel engines is usually supplied by

A.oil from the main engine sump

B.an independent lube oil system

C.the stern bearing head tank

D.the stem bearing sump tank


正确答案：B

第2题：

Which lubricating oil additive is used in diesel engines to reduce the tendency(倾向)for sludge and varnish to form on the engine parts?

A.Flash point improvers

B.Pour point improvers

C.Inhibitors

D.Foam suppressors(抑制物)


正确答案：C

第3题：

Main engines as well as auxiliary engines operating on heavy fuel should have continuousoon the lubricating oil, either according tothebypass or batch principles

A.filtering

B.centrifuging

C.depositing

D.operating


答案：B

第4题：

单选题
On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by （）.
A

banjo feed

B

splash feed

C

gravity feed

D

pressure feed


正确答案： B
解析： 暂无解析

第5题：

单选题
For most diesel propulsion and generator engines, the over-speed trip device will stop the engine by （）
A

moving the governor control to stop

B

shutting off the lubricating oil supply

C

tripping the governor emergency stop lever

D

shutting off the fuel supply


正确答案： D
解析： 暂无解析

第6题：

In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .

A.all of the oil used by the engine through a filter

B.some of the oil used by the engine through a filter

C.some of the oil used by the engine through a centrifuge

D.all of the oil used by the engine through a centrifuge


正确答案：C

第7题：

单选题
Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by （）
A

water in the fuel

B

insufficient fuel for combustion

C

clogged air intake passages

D

burning lubricating oil


正确答案： B
解析： 暂无解析

第8题：

For most diesel propulsion and generator engines, the over-speed trip device will stop the engine by

A.moving the governor control to stop

B.shutting off the lubricating oil supply

C.tripping the governor emergency stop lever

D.shutting off the fuel supply


正确答案：D

第9题：

单选题
Excessive lubricating oil consumption in a running diesel engine can be caused by （）
A

clogged lube oil piping

B

excessive valve-guide clearance

C

high lube oil viscosity

D

low lube oil temperature


正确答案： A
解析： 暂无解析

第10题：

单选题
Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the（）
A

cooling water leaving each cylinder

B

fuel oil entering the injector

C

exhaust gases at various locations

D

lube oil at the bearing supplies


正确答案： A
解析： 暂无解析

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