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Today, crankshafts for large 2-stroke crosshead engines are

题目
单选题
Today, crankshafts for large 2-stroke crosshead engines are of the （）type.
A

semi-built

B

built-up

C

solid forged

D

individual forged

参考答案和解析
正确答案： B
解析： 暂无解析
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相似问题和答案

第1题：

单选题
Large crosshead type engine generally has two lubrication systems, a function performed only by crankcase oil system is（）
A

lubricating

B

cooling

C

cleaning

D

neutralizing


正确答案： A
解析： 暂无解析

第2题：

单选题
In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.
A

inefficiency

B

oiliness

C

detergency

D

purity


正确答案： A
解析： 暂无解析

第3题：

Today,the City of London is the business center of London where（）are located.

  • A、big supermarkets
  • B、theatres and cinemas
  • C、large financial organizations
  • D、restaurants and cafes

正确答案:C

第4题：

单选题
（） are generally formed in the frame of the both in-line and Vee engines to give maintenance access to the crankshaft main and connecting rod large end bearing.
A

Doors

B

Aspirate gauzer

C

Coupling

D

Blind


正确答案： B
解析： 暂无解析

第5题：

单选题
The main function of tie rods in the construction of large, low speed diesel engines is to（）.
A

stiffen the bedplate in way of the main bearings to increase the engines longitudinal strength

B

accept most of the tensile loading that results from the firing forces developed during operation

C

mount the engine frame securely to the hull to prevent shaft coupling misalignment

D

connect the crosshead solidly to the piston rod


正确答案： C
解析： 暂无解析

第6题：

单选题
（） can be found on most medium to large merchant vessels even if the main engine is either a steam turbine or 2-stroke crosshead engine.
A

The medium speed 4-stroke trunk piston engine

B

The low speed 2-stroke crosshead engine

C

The medium speed 2-stroke crosshead engine

D

The low speed 4-stroke trunk piston engine


正确答案： A
解析： 暂无解析

第7题：

单选题
Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.
A

cylinder liners and piston rings

B

main bearings

C

crankpin bearings

D

turboblower


正确答案： D
解析： 暂无解析

第8题：

单选题
Smaller engines can be made more rigid than large ones and may not have （）.
A

connecting rods

B

crankshaft

C

crankcase

D

through bolts


正确答案： D
解析： 暂无解析

第9题：

单选题
Marine four-stroke diesel engines are mainly （）.
A

of crosshead type

B

of trunk piston type

C

of low speed type

D

all the above


正确答案： D
解析： 暂无解析

第10题：

单选题
Doors are generally formed in the （） of the both in-line and Vee engines to give maintenance access to the crankshaft main and connecting rod large end bearing.
A

bedplates

B

columns

C

cylinder blocks

D

safety caps


正确答案： C
解析： 暂无解析

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