轮机英语船舶动力装置章节练习(2019.05.04)

单项选择题
The lube oil in the bearings is drawn from a （）, usually located in the bedplate.
A.tank
B.sump
C.vessel
D.bottle
单项选择题
Turbocharging of marine diesel engine is achieved by two distinct methods, （） termed the constant pressure and the pulse system.
A.respectable
B.respectful
C.respective
D.respectively
单项选择题
The （） chamber is enclosed between the cylinder head and piston.
A.lubrication
B.injection
C.cooling
D.combustion
单项选择题
The starting air system usually has （） to prevent starting if anything is not in order.
A.stop valves
B.interlocks
C.non-return valves
D.air vents
单项选择题
Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
A.fuel oil vapor at the sludge tank vent
B.unburned fuel vapors in the scavenge air receiver
C.lube oil vapors in the crank case
D.lube oil vapors in the engine room
单项选择题
Dirty oil must be （） before being used again.
A.mixed with clean oil
B.purified
C.heated
D.strained
单项选择题
In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of （）.
A.oil
B.sea water
C.air
D.fresh water
单项选择题
The lube oil pump used in a diesel engine is a （）.
A.volute pump
B.centrifugal pump
C.diaphragm pump
D.gear pump
单项选择题
The cast iron（）for the cross-head are attached to the top section and seal off the crankcase.
A.cylinder cover
B.cross-head shoes
C.guide-ways
D.scavenging boxes
单项选择题
Bottom blow valves are installed on auxiliary water-tube boilers to （）
A.remove suspended and precipitated solids from the boiler water
B.completely drain the boiler in an emergency situation
C.prevent hardened scale deposits in the water drum
D.remove floating impurities from the oily water surface