swing 35°right or left
remain locked in its last position
move to the mid-ship position automatically
jam against the rudder emergency stops
第1题：
A.SYSTEM INFORMATION TYPE1
B.SYSTEM INFORMATION TYPE2
C.SYSTEM INFORMATION TYPE3
D.SYSTEM INFORMATION TYPE4
E.SYSTEM INFORMATION TYPE5
F.SYSTEM INFORMATION TYPE6
第2题：
材料：
At 1800，the hydraulic steering system failed once again．The master realized he would require shore assistance to rectify the problem，and diverted towards Portland using the thruster to steer by．The weather at this time was south-south-west force 5．At about three hours later，the thruster drive unit failed due to a leaking fuel injector pipe on the power unit．This was replaced using the spare carried on board．Immediately following the engine restart，an adjacent fuel line failed causing shut down of the unit．With no fuel line spares available，the thruster power unit could not be used．The failure of this unit，and that of the main hydraulic steering system，left the vessel without any steering capability．
At 2155，with the weather deteriorating and no steering，the master contacted the Portland Coastguard and a“Pan pan”message was broadcast．A tow to Portland Harbor was arranged and she arrived alongside at 0240 the following morning．The subsequent investigation found that the main hydraulic steering system failure was due to a seized shuttle valve in the main hydraulic solenoid valve block．The solenoid valve had been recently overhauled．It was thought that the“O”rings fitted to the shuttle valve were of either the wrong type or a defective one．The valve had seized in such a position that hydraulic pressure by-passed the system preventing use of the hand steering．
问题：
The vessel was steered by thruster because ________ failed．
A.the hydraulic steering system
B.the solenoid valve
C.the thruster driving unit
D.the hand steering
The time that the thruster drive unit failed was ________ hrs．A.1800
B.2100
C.2155
D.0240
When the hydraulic steering system failed，________．A.the hand steering system could still be used
B.the auto steering system could still be used
C.both hand and auto steering system were out of use
D.neither and steering system nor auto steering system was out of use
The real reason that caused the hydraulic steering system to fail was that ________．A.no fuel line spare were available
B.the weather was deteriorating
C.the“O”rings fitted to the shuttle valve were of either the wrong type or a defective one
D.the thruster power unit failed
请帮忙给出每个问题的正确答案和分析，谢谢！
第3题：
If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow for contraction to prevent
A.failure of the hydraulic hose
B.excessive flow through the line
C.friction in other areas of the hydraulic system
D.overheating of the hydraulic fluid
第4题：
下面系统消息中，在通话状态发送的有（）。
第5题：
这些舱盖通常是用电力或液压驱动的。（）
第6题：
Which of the following problems may be encountered by using an oil having a viscosity higher than that specified for an operating hydraulic system?
A.External seal leakage
B.Hunting due to fast response
C.Hydraulic oil film breakdown
D.Increased power consumption
第7题：
The system administrator did a new install of AIX on a server about a week ago. The system was not rebooted after the installation. CDE is running on this system as is TCPIP. The system administrator has started configuring the system percompany directives. The power cable was inadvertently disconnected from the wall causing the sever to lose power. Upon reboot, the system appears to hang during log in from the console or from Xterminals. Which of the following is the most probable cause?（）
第8题：
After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?
A.The relief valves in the system should be readjusted
B.The filters and strainers should be checked frequently
C.All system pressure should be readjusted
D.The system should be drained and renewed with a fluid of different operating characteristics
第9题：
The（）(自动舱盖) is operated by electric or hydraulic power.
第10题：
哪些系统消息具有bis和ter结构（）