The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.

A、so a height

B、such a height

C、so high

D、such high

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更多“The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.”相关的问题

第1题

[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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第2题

[单选题] It is very necessary that each cylinder （） before the charged air is compressed.

A、is scavenged  B、has been scavenged  C、be scavenged  D、was scavenged  

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第3题

[单选题] The principal difference between loop scavenging and crossflow scavenging, as used in single acting diesel engines, is the （）

A、direction of air flow within the cylinder  B、sequence of port opening  C、method of opening exhaust ports  D、volume of air admitted to the cylinder  

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第4题

[单选题] Propulsion engines and the vast majority of auxiliary generator engines are designed to allow a generous through-flow of scavenge air in order to control （）

A、the lubricating oil consumption  B、the turbine blade temperature  C、the flow rate of fuel  D、scavenge air pressure  

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第5题

[单选题] When occurring a fire in the scavenge air box, the following measures should be taken except for（）

A、reducing speed to SLOW and asking bridge for permission to stop  B、stopping the fuel oil supply  C、switching-on the auxiliary blowers  D、putting the scavenge air box fire extinguishing equipment into function  

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第6题

[单选题] The ports are drilled in the liners at an angle of approx 20℃ the result being that （） is given a rotary movement.

A、the scavenging air  B、the exhaust gases  C、the mixed air  D、the spray oil  

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第7题

[单选题] The term diesel engine scavenging means（）

A、delivering more air into the cylinder than it would normally receive during an ordinary charging process  B、forcing the products of combustion out of the cylinder with the fresh air charge  C、collecting the air charge at the cleaner  D、combustion and expansion of hot gas  