轮机英语船舶动力装置章节练习(2017.12.13)

单项选择题
A SECONDARY function of a waste heat boiler is to （）.
A.reduce engine exhaust noise
B.reduce engine back pressure
C.increase engine cycle efficiency
D.increase turbocharger efficiency
单项选择题
（） are mounted on and bolted to the bed-plate cross girders.
A.The crankshaft
B.The crankcase
C.The guide-ways
D.The frames
单项选择题
The bearing shells depend on the accuracy of （） to held them in a truly circular shape.
A.the gap
B.the clearance
C.the bore
D.the housing
单项选择题
The engine is started with （） supplied from air receivers.
A.pressure oil
B.pressure water
C.compressed air
D.cooling water
单项选择题
The bed-plate is secured in the longitudinal direction by means of bolts known as （）.
A.end-chock bolts
B.side-chock bolts
C.through bolts
D.tie rods
单项选择题
Since the burning or combustion takes place within the engine itself, the engine is known as （）.
A.a fire -tube boiler
B.an internal combustion engine
C.an external combustion engine
D.an internal combustion generator
单项选择题
（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.
A.The driven gear
B.The drive
C.The grease
D.The lubricating oil
单项选择题
As a heat engine,（） energy is the source of power by which the diesel engine can be operated.
A.electric
B.heat
C.mechanical
D.exhaust
单项选择题
The lubricating pipes and dusts should be blown out with （）.
A.atmosphere
B.the fresh water
C.compressed air
D.chemical compounds
单项选择题
（） are fitted in the exhaust system and facilitate charge removal and scavenging in each cylinder.
A.Diffusers
B.Compressors
C.Steam boilers
D.Soot blowers