海船船员考试
单选题The pivot pin at the base of a sheath-screw boom davit must be（）.A inserted each time before the booms are cranked outB periodically removed for inspection and lubricatedC replaced at each inspection for certificationD in the locked position after the
题目
inserted each time before the booms are cranked out
periodically removed for inspection and lubricated
replaced at each inspection for certification
in the locked position after the boat is cradled and griped down
参考答案和解析
相似问题和答案
第1题：
The boom stops are installed on an offshore crane to ______.
A.prevent the boom from being raised too high
B.prevent the boom from swinging
C.support the boom when not in use
D.prevent the boom from being lowered
第2题：
While cranking out a quadrantal davit，slippage of the quadrant due to excessive wear or failure of the teeth in the quadrant will cause the ______．
A.Davit arm to pivot on the traveling nut and the head to fall outboard
B.Traveling nut to lock up in place on the worm gear
C.Limit switch to engage and hold the traveling nut in position
D.Winch brake to lock in position and prevent lowering the boat
第3题：
On a crane, the boom indicator tells the operator what angle the boom angle is compared to the ______.
A.vertical position
B.horizontal position
C.boom stop angle
D.minimum radius angle
在船上，吊杆指示器指示一个吊杆与什么比较的角度？水平线位置
第4题：
package geometry； public class Hypotenuse { public InnerTriangle it = new InnerTriangle（）； class InnerTriangle { public int base； public int height； } } Which is true about the class of an object that can reference the variable base？ （）
- A、 It can be any class.
- B、 No class has access to base.
- C、 The class must belong to the geometry package.
- D、 The class must be a subclass of the class Hypotenuse.
正确答案:C
第5题：
You want to create the Recovery Manager (RMAN) Virtual Private Catalog (VPC) to maintain a separation of responsibilities along with a consolidation of RMAN repository. Which condition must be met before you create the VPC?（）
- A、A base catalog exists
- B、The recovery catalog is empty
- C、The base recovery catalog must be dropped
- D、A target database is registered in the recovery catalog
正确答案:A
第6题：
With a given load on the cargo hook，tension in a single span topping lift ______.
A.increases as the boom's angle to the horizontal increases
B.is at a maximum when the boom is at a 45° angle to the horizontal
C.increases as the boom's angle to the horizontal decreases
D.decreases as the boom's angle to the horizontal decreases
第7题：
Which type of davit is not considered to be a mechanical davit ________．
A.Sheath-screw boom
B.Radial
C.Crescent
D.Quadrantal
第8题：
A.It can be any class.
B.No class has access to base.
C.The class must belong to the geometry package.
D.The class must be a subclass of the class Hypotenuse.
第9题：
ASP（音频控制面板）的正常位置是（）
- A、MASK／BOOM开关在BOOM位；ALT／NORM开关在NORM位
- B、MASK／BOOM开关在MASK位；ALT／NORM开关在NORM位
- C、MASK／BOOM开关在MASK位；ALT／NORM开关在ALT位
- D、MASK／BOOM开关在BOOM位；ALT／NORM开关在ALT位
正确答案:A
第10题：
Every resource plan must contain an allocation to which consumer group？（）
- A、 LOW_GROUP
- B、 SYS_GROUP
- C、 DEFAULT_GROUP
- D、 BASE_GROUP
- E、 OTHER_GROUPS
正确答案:E