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发布时间:2024-02-07 05:45:55

[单选题]The main bearing shellssteel with a lining of bearing metal.
A.are made of
B.are made from
C.is made by
D.is made with

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[单选题]The bearing clearance can be adjusted by means of.
A.shims
B.gaskets
C.jointings
D.washes
[单选题] A thrust bearing of the tilting pad type is fitted___the drive shaft.
A.on
B.to
C.in
D.with
[单选题] What type of stern tube bearing has the least friction ________.
A.Oil-lubricated bearings
B.Lignum vitae
C.Hard rubber
D.Bronze bushings
[单选题] A true bearing of a charted object,when plotted on a chart,will establish a ______.
A. Fix
B. Line of position
C. Relative bearing
D. Range
[单选题]RB211TRENT700发动机有几个轴承腔( )how many bearing chambers are comprised in the engine ?
A.三个轴承腔 Three chambers
B.四个轴承腔 Four chambers
C.五个轴承腔 Five chambers
[单选题]The main generator should be connected to
A.the main switchboard
B.the emergency switch board
C.the section switch board
D.the distribution board
[单选题]Mariners proceeding across the main route are _____ to do so at as wide an angle as practicable.
A. recommended
B. reported
C. applied
D. complied
[单选题]The main factors which determineof each cylinder is the cylinder's bore and the length of stroke.
A.the output
B.the velocity
C.the speed
D.the temperature
[单选题] Mariners proceeding across the main routes are ______ to do so at as wide an angle as practicable.
A.recommended
B.reported
C.applied
D.complied
[单选题] Which device provides the main means in the GMDSS for locating ships in distress or their survival craft ________.
A.Radio direction finder
B.Satellite EPIRBs
C.MF/HF DSC
D.VHF homing device
[单选题] What is the main purpose of dunnage?
A. To act as ballast for light vessels
B. To provide ventilation and drainage for cargo
C. To secure the tarpaulins in place
D. To support weakened builkheads
[单选题]What is the main function of flight interphone?飞行内话的主要功能是( )
A.It provide the communication between crew menber and crew to flight attendant station. 提供机组与机组,机组时乘务员站位间的通话
B.It provide the communication between cockpit and ground mechanic near front landing gear. 提供驾驶舱与前起落架处的地面机械员之间的通话
C.It provide the communication between service interphone jack and cockpit and flight attendant stations. 提供各勤务插孔,驾驶舱与乘务员之间的通话
[单选题]The main factors which determine the output capacity of each cylinder is
A.the cylinder's bore and the length of stroke
B.the upper part of the cylinder
C.the lower part of the cylinder
D.the piston rings
[单选题]With the present working ciion and main engne power oupu,to increasefrom5to6RPMoud
A.persuasive
B.personal
C.periodical
D.permissible
[单选题]Air conditioning systems fall into two main classes and central systems.
A.individual unit systems
B.flexible unit systems
C.rotary unit systems
D.reciprocating unit systems
[单选题] What is the main purpose of DGPS?
A.Improve positioning accuracy
B.Decrease positioning accuracy
C.Reduce operational cost
D.I don't know
[单选题]The cylinder liners of the main engine are usually made of
A.stainless steel
B.heat-resistant steel
C.aluminum alloy
D.both heat-resistant and wearable cast iron
[单选题]Can you tell me what main engineon board your ship?
A.Have you
B.you have
C.he has
D.has he

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