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单选题
The sludge tank installed in the diesel engine room is used to collect（） Ⅰ.sludge from the fuel oil settling tanks ad centrifuge Ⅱ.water that has been collected in the settling tank
A
Ⅰonly
B
Ⅱ only
C
bothⅠand Ⅱ
D
neitherⅠor Ⅱ
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单选题The sludge tank installed in the diesel engine room is used to collect（） Ⅰ.sludge from the fuel oil settling tanks ad centrifuge Ⅱ.water that has been collected in the settling tankA
ⅠonlyB
Ⅱ onlyC
bothⅠand ⅡD
neitherⅠor Ⅱ
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reduce water temperatureB
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Between；more commonlyB
Among；the most commonlyC
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injection pump plungers stuck or wornB
low compressionC
solenoid stuck openD
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考题
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dilutes the lube oil and reduces its viscosityB
forms sulfuric acid in the lube oilC
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考题
单选题Sludge formation in a diesel engine lube oil system is caused by（）A
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Flash point improversB
Pour point improversC
InhibitorsD
Foam suppressors
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单选题If sludge accumulates on the underside of a diesel engine piston, it will（）A
cause blow-byB
chemically attack the piston skirtC
form an emulsion of lube oil and waterD
raise the piston temperature
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单选题The double bottom in a vessel is a space comprised of （）A
plating forming the engine room tank topB
doubler plating installed over the flat keel plateC
a watertight boundary formed by the inner bottomD
compartments between the inner and outer bottoms
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