轮机英语船舶辅助机械章节练习(2017.12.14)

单项选择题
Water level controllers of the boiler must be kept operable to protect external steam-using plant from water “（）” danger.
A.carry off
B.carry down
C.carry on
D.carry over
单项选择题
In the process of （）, liquid changes into gas.
A.evaporation
B.frosting
C.condensing
D.compressing
单项选择题
The bilge system has been performing well; however, the aft starboard engine room bilgewell suddenly fails to be pumped outWhich of the following should be done first to determine the cause?（）
A.Open the bilge pump for inspection
B.Remove each of the manifold valves
C.Remove only the manifold valve to the affected bilge-well
D.Attempt to pump out another bilge well to determine if the entire system is affected
单项选择题
Moisture in a refrigeration system can cause （）.
A.freezing the expansion valve closed
B.corrosion of system piping
C.improper temperature regulation
D.all of the above
单项选择题
（） shall be provided to every oil tanker of 150 tons gross tonnage and above to record relevant machinery space and cargo/ballast operations.
A.Oil Record Book Part Ⅰ
B.Oil Record Book Part Ⅱ
C.Oil Record Book Part Ⅰ or Part Ⅱ
D.Oil Record Book Part Ⅰ and Part Ⅱ
单项选择题
Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）
A.Pressure-reducing valve
B.Unloading valve
C.Counterbalance valve
D.Pressure-relief valve
单项选择题
In an oil cooler circulated by sea water, the oil is at a larger pressure the result being that any leak in the cooler will mean a loss of （）.
A.oil
B.sea water
C.refrigerant
D.fresh water
单项选择题
In a general cargo crane, （） is fitted to raise or lower the jib.
A.the slewing motor
B.the luffing motor
C.the hoisting motor
D.none of the above
单项选择题
The inner part of the condenser should be cleaned with （）.
A.gas oil
B.diesel oil
C.chemical compound
D.Freon-12
单项选择题
The latent heat of evaporation is dissipated in the （） in a compression refrigeration system.
A.evaporator
B.condenser
C.expansion valve
D.compressor