海船船员考试

单选题Scale and dirt accumulation in the waterside of a lube oil cooler will be indicated by a gradual increase in the lube oil（）.A TBN numberB viscosityC temperatureD foaming

题目
单选题
Scale and dirt accumulation in the waterside of a lube oil cooler will be indicated by a gradual increase in the lube oil（）.
A

TBN number

B

viscosity

C

temperature

D

foaming

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相似问题和答案

第1题：

Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ______.

A.refrigerant bubbles in the lube oil

B.refrigerant reducing the lube oil viscosity

C.oxidation(氧化) of the lube oil from overheating

D.reducing the floc or cloud point of the oil


正确答案：C

第2题：

单选题
Which of the listed problems would be indicated by an accumulation of water in one cylinder, in addition to the crankcase of an idle diesel engine?（）
A

Excessive cylinder liner

B

water in the fuel system

C

Cracked cylinder liner

D

Leaking lube oil cooler


正确答案： A
解析： 暂无解析

第3题：

If the coolant temperature of a closed cooling water system for a diesel enginegradually increases, the trouble usually is( ).

A.a broken shaft on the freshwater pump

B.an excessive accumulation of scale in the heat exchanger

C.an incorrect thermostatic element operating range

D.lube oil in the cooling water


正确答案：B
解析：gradually：逐渐地;accumulation：累积;scale：结垢;thermostatic：恒温的;range：范围
译文：如果一个柴油机内的闭式冷却系统内的冷却介质温度逐渐升高，则通常的原因是热交换器内有过多的积垢。

第4题：

单选题
The lube oil cooler is located after the lube oil filter in order for （）
A

the filter to operate more efficiently

B

the lube oil cooler to be bypassed

C

positive lube oil pump suction to be assured

D

galvanic action in the cooler to be minimized


正确答案： C
解析： 暂无解析

第5题：

单选题
Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.
A

excessive crankcase pressure

B

excessive lube oil temperature

C

contamination of the lube oil by water

D

contamination of the cooling water by lube oil


正确答案： C
解析： 暂无解析

第6题：

单选题
If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is （）
A

a broken shaft on the freshwater pump

B

an excessive accumulation of scale exchanger

C

an incorrect thermostatic element operating range

D

lube oil in the cooling water


正确答案： D
解析： 暂无解析

第7题：

单选题
A dirty lube oil strainer can result in（）
A

crankcase

B

low lube oil temperature

C

excessive oil consumption

D

low bearing oil pressure


正确答案： C
解析： 暂无解析

第8题：

What is the most usual reason for the fresh water-sea water heat exchanger fouling in the sea side?

A.lube oil sludge accumulating in it

B.dirt and scale etc , formed on the surfaces

C.deformation of the tubes and the shell or the plates

D.lube oil leakage into sea-water side


正确答案：B

第9题：

单选题
To determine if the lube oil filter elements need changing, （）.
A

open the filter and inspect the elements

B

check the lube oil pump discharge pressure

C

check the lube oil header pressure

D

check the pressure drop across the filter


正确答案： B
解析： 暂无解析

第10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

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