轮机英语船舶辅助机械章节练习(2017.12.01)

单项选择题
If one hydraulic pump of an electro-hydraulic steering unit falls, the vessels steering can be initially and best maintained by using the （）.
A.trick wheel
B.accumulator
C.standby pump
D.telemotor
单项选择题
Prior to running the hydraulic pump, examine the system carefully and ensure that the lever of control valves is in （） position.
A.neutral
B.end
C.opening
D.closure
单项选择题
In a general cargo crane, （） is fitted to lift the cargo load.
A.the slewing motor
B.the luffing motor
C.the hoisting motor
D.none of the above
单项选择题
Which of the following chemicals will be used where protection against caustic cracking is required in boiler treatment?（）
A.Sodium hydroxide
B.Sodium carbonate
C.Sodium nitrate
D.Sodium polyphosphate
单项选择题
Grease the roller bearings with HPgun In the sentence “HP” means （）.
A.horse power
B.high pressure compressor
C.hand pump
D.high pressure
单项选择题
Sealing in pump shaft is achieved by means of the （）.
A.gasket
B.packing
C.washer
D.spring
单项选择题
Two rams of the hydraulic gear are linked at their outer ends to （） by a crosshead and swivel block.
A.the piston rod
B.the tiller arm
C.the connecting rod
D.the rudder
单项选择题
In a hydraulic system, （） are used to protect the system from over pressure.
A.stop valves
B.check valves
C.safety valves
D.reducing valves
单项选择题
When the union purchase derrick is operated, one derrick is positioned over the quayside and the other almost vertically over the （）.
A.dock
B.hold
C.pedestal
D.machinery space
单项选择题
Which of the following operations need NOT to be entered on the Oil Record Book Part I?（）(1) Disposal of oil residues(2) Internal transfer of fuel oil
A.（1）only
B.（2）only
C.both（1）and（2）
D.neither（1）nor（2）