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单选题
In a two-stroke engine, there are always a series of openings known as （）, and in some circumstances, there are also openings known as （）, in the part of the cylinder liner.
A
scavenging air ports；exhaust ports
B
inlet ports；scavenging air ports
C
scavenging air ports；inlet ports
D
exhaust ports；inlet ports
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更多 “单选题In a two-stroke engine, there are always a series of openings known as （）, and in some circumstances, there are also openings known as （）, in the part of the cylinder liner.A scavenging air ports；exhaust portsB inlet ports；scavenging air portsC scavenging air ports；inlet portsD exhaust ports；inlet ports” 相关考题
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respectfulC
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考题
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考题
单选题The process of scavenging a two-stroke/cycle diesel engine serves to（）A
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考题
单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）A
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单选题The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is （）.A
475 RPMB
950 RPMC
1900 RPMD
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it has a longer power strokeB
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it develops twice as many power strokes at the same speedD
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单选题（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.A
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单选题A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is （）A
one-half engine speedB
the same as engine speedC
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单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）A
a two-stroke engine can’t work without cylindersB
a two-stroke engine can’t work without pistonsC
a two-stroke engine can’t work without crankshaftsD
a two-stroke engine can’t work without a blower
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