轮机英语船舶辅助机械章节练习(2018.02.04)

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
Thermal energy in transition is also referred to as （）.
A.heat
B.power
C.horsepower
D.foot-pound
单项选择题
The amount of fluid delivered by a helical pump can be regulated by （）.
A.throttling the pressure line
B.changing the speed of the rotor
C.either A or B
D.None of the above is tree
单项选择题
The amount of fluid delivered by a reciprocating pump can be regulated by （）.
A.throttling the pressure line
B.changing the speed of the piston
C.either A or B
D.None of the above is tree
单项选择题
Because of the reduced （）in the distillation system, some of the sea water boils as it flows through the tubes of the evaporator.
A.pressure
B.temperature
C.density
D.volume
单项选择题
The low pressure side of a refrigeration system is considered to exist from the （）.
A.expansion valve to the compressor
B.receiver to the expansion coil
C.expansion valve to the evaporator
D.condenser to the expansion valve
单项选择题
The correct pH value of boiler water is achieved by continuous addition of a suitable （） to the feed.
A.acid
B.alkali
C.salt
D.None of the above
单项选择题
Which of the following pumps is used where a relatively high pressure and small capacity are required?（）
A.Volute pump
B.Diffuser pump
C.Regenerative pump
D.All of the above
单项选择题
An advantage of a helical gear pump over a simple gear pump is that the helical gear pump is capable of （）.
A.maintaining a steadier speed
B.delivering liquids over greater distances
C.operating for longer periods of time
D.producing a smoother discharge flow
单项选择题
Special thrust devices are provided on ships to improve their （） at zero ship speed when the rudder is relatively ineffective.
A.brake capabilities
B.reversing capabilities
C.maneuvering capabilities
D.acceleration capabilities