海船船员考试

单选题A large two-stroke/cycle direct reversing diesel engine is to be reversedPrior to the admission of starting air you must （）A line up the engine fore restarting with light diesel oilB reposition the fuel injection camC change the intake and exhaust valv

题目
单选题
A large two-stroke/cycle direct reversing diesel engine is to be reversedPrior to the admission of starting air you must （）
A

line up the engine fore restarting with light diesel oil

B

reposition the fuel injection cam

C

change the intake and exhaust valve cam positions

D

place the starting cam in the intermediate position

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相似问题和答案

第1题：

单选题
In order to reverse the rotation of a two-stroke/cycle loop scavenged, direct reversing, propulsion diesel engine, the cam positions must be changed for the （）.
A

starting air and fuel pumps

B

piston cooling pumps

C

exhaust valves

D

all of the above


正确答案： A
解析： 暂无解析

第2题：

单选题
The size of the exhaust valve opening is （）
A

most critical in a four-stroke cycle diesel engine

B

most critical in a two-stroke/cycle diesel engine

C

most critical in a four-stroke/cycle diesel engine if it is turbocharged

D

of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine


正确答案： A
解析： 暂无解析

第3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4题：

单选题
Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）
A

bearing pressure in a four-stroke/cycle acting single diesel engine is continually reversed

B

bearing pressure in a two-stroke/cycle single acting diesel engine is continually reversed

C

the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine

D

two-stoke/cycle diesel engines require more complicated lubrication piping


正确答案： B
解析： 暂无解析

第5题：

单选题
In the cylinder head of a two-stroke/cycle diesel engine, valves are used for（）
A

air intake

B

a fuel outlet

C

cooling water inlets

D

exhausting combustion gas


正确答案： D
解析： 暂无解析

第6题：

单选题
When inspecting piston rings through the ports of a two-stroke/cycle diesel engine, black areas on the sealing surfaces are the result of （）
A

insufficient lubrication

B

improper piston cooling

C

blow-by

D

overload operation


正确答案： B
解析： 暂无解析

第7题：

单选题
Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
A

Exhaust and scavenging

B

Scavenging and compression

C

Ignition and expansion

D

Exhaust and compression


正确答案： A
解析： 暂无解析

第8题：

单选题
The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（）
A

one half crankshaft speed in a two-stroke cycle diesel engine

B

crankshaft speed in a two-stroke cycle diesel engine

C

two times crankshaft speed in a two-stroke cycle diesel engine

D

one-fourth times crankshaft speed in a four-stroke cycle diesel engine


正确答案： A
解析： 暂无解析

第9题：

单选题
The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to（）
A

discharge exhaust gases and smoke

B

furnish energy to the turbocharger

C

reduce engine room noise

D

all of the above


正确答案： C
解析： 暂无解析

第10题：

单选题
During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）
A

Flywheel inertia

B

Admission of starting air

C

The way of the vessel

D

securing of fuel to the cylinders


正确答案： B
解析： 暂无解析

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