海船船员考试

单选题Black smoke coming from a boiler can be caused by （）.A low water levelB low oil pressureC excessively high fuel pressureD an improper air/fuel ratio

题目
单选题
Black smoke coming from a boiler can be caused by （）.
A

low water level

B

low oil pressure

C

excessively high fuel pressure

D

an improper air/fuel ratio

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相似问题和答案

第1题：

If heavy smoke is coming from the paint locker, the FIRST firefighting response should be to ______.

A.release the CO2 flooding system

B.open the door to evaluate the extent of the fire

C.enter and use a portable extinguisher

D.secure the ventilation


正确答案：D
假如烟从油漆间冒出，救火的第一响应应是关闭通风。

第2题：

An administrator sees that smoke is coming from the UPS. Which of the following should they doFIRST？（）

  • A、Use a Class A fire extinguisher.
  • B、Evacuate personnel.
  • C、Install additional fans in the UPS
  • D、Backup the servers.

正确答案:B

第3题：

When an auxiliary boiler is panting and emitting(发出) black smoke, you should______.

A.increase the fuel oil temperature

B.decrease the fuel oil temperature

C.decrease the fuel oil supply pressure

D.increase the air supply


正确答案：D

第4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5题：

单选题
White smoke exhausting from a diesel engine can be caused by （）
A

low combustion temperature

B

a leaking fuel nozzle check valve

C

late fuel injection

D

plugged oil-scraper ring hole


正确答案： A
解析： 暂无解析

第6题：

It can be known from the passage that increase in the salinity of ocean water is caused by___________.

A.melting of sea ice
B.precipitation
C.evaporation
D.supplement of salt

答案：C
解析：
根据第一段“One of these is the subtraction of water from the ocean by means of evapora-tion．In this manner，the salinity is increased．”可知，答案为C，即海水蒸发可使盐度增加。

第7题：

单选题
Black smoke exhausting from a diesel engine indicates（）
A

proper fuel injection

B

water in the fuel

C

incomplete combustion

D

burning of lube oil


正确答案： A
解析： 暂无解析

第8题：

Haze is not caused by ______．

A.forest fires

B.smoke from industrial areas

C.dust or sand storms

D.water droplets with the relative humidity more than 95%


正确答案：D

第9题：

单选题
The indications of a scavenge fire are excessive black smoke, （） and peeling from scavenge trunking.
A

turbo-chargers surge

B

spark seen from the drains

C

paint blistering

D

all above are right


正确答案： A
解析： 暂无解析

第10题：

单选题
White smoke exhausting from a diesel engine can be caused by a （）
A

high combustion temperature

B

high compression pressure

C

cracked cylinder liner

D

fuel with a high vanadium content


正确答案： A
解析： 暂无解析

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