海船船员考试

单选题Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）A increasing the quantity of starting airB increasing the lube oil pressureC heating the engine fuel supplyD heating the engine

题目
单选题
Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）
A

increasing the quantity of starting air

B

increasing the lube oil pressure

C

heating the engine fuel supply

D

heating the engine coolant

参考答案和解析
正确答案： A
解析： 暂无解析
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相似问题和答案

第1题：

单选题
On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）
A

dial indicator

B

outside caliper

C

bridge gauge

D

tram rod


正确答案： D
解析： 暂无解析

第2题：

单选题
While underway, which of the following would be the FIRST step in reversing a direct reversing large, low-speed, main propulsion, diesel engine?（）
A

Manually trip the over-speed device

B

Interrupt the fuel flow to the engine

C

Disengage the safety interlock

D

Slide the camshaft to the neutral position


正确答案： B
解析： 暂无解析

第3题：

The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.

A.large conical springs

B.compressed air pressure

C.hydraulic pressure

D.exhaust gas pressure


正确答案：B

第4题：

单选题
Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?（）
A

Lubrication to the defective cylinder should be increased

B

Cooling water temperature to the engine should be increased

C

Only the turbocharger speed should be reduced

D

Engine speed should be reduced


正确答案： D
解析： 暂无解析

第5题：

单选题
The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by （）.
A

direct action of cam shaft

B

compressed air pressure

C

hydraulic “push rods”

D

direct action of the main piston moving down


正确答案： A
解析： 暂无解析

第6题：

单选题
Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）
A

increasing the quantity of starting air

B

increasing the lube oil pressure

C

heating the engine fuel supply

D

heating the engine jacket water


正确答案： A
解析： 暂无解析

第7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8题：

单选题
The rate of cylinder lubricating oil metered to each cylinder of a large low-speed main propulsion diesel engine is （）
A

the same, whether at sea, or during maneuvering

B

adjusted during each hour of operation while at constant RPM

C

higher at sea than while maneuvering

D

lower at sea than while maneuvering


正确答案： C
解析： 暂无解析

第9题：

单选题
Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
A

fuel oil vapor at the sludge tank vent

B

unburned fuel vapors in the scavenge air receiver

C

lube oil vapors in the crank case

D

lube oil vapors in the engine room


正确答案： C
解析： 暂无解析

第10题：

单选题
The power developed by a large slow-speed main propulsion diesel engine is dependent upon the （）
A

quantity of air it takes in and retains in the cylinders during a given time period

B

proportion of trapped air that is utilized in the combustion process

C

thermodynamic efficiency of the engine cycle

D

all of the above


正确答案： B
解析： 暂无解析

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