Air scavenging of a diesel engine cylinder（）

A、blows out the exhaust gases

B、supplies oxygen for combustion

C、cools the valves and cylinder walls

D、all of the above

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更多“Air scavenging of a diesel engine cylinder（）”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] 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3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4题

[单选题] On opposite ends of a single shaft of a turboblower are a gas driven （）and a air compressor, which are sealed each other.

A、charge air receiver B、scavenging air belt C、turbine D、air cooler

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第5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

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第6题

[单选题] Exhaust temperature increases in all cylinders, the possible cause may be（） (1) increased scavenging air temperature (2) air in fuel pumps and fuel valves (3) fouling of air and gas passages

A、(1)+(2) B、(1)+(3) C、(2)+(3) D、(1)+(2)+(3)

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第7题

[单选题] Cross scavenging requires the fitting of （） to prevent air or exhaust gas escape when the piston is at the top of the stroke.

A、a exhaust valve B、a piston skirt C、a piston crown D、an air suction valve

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第8题

[单选题] Maintaining the lowest possible scavenging air temperature at all times is not recommended due to the possibility of the （）.

A、air charge density becoming too high B、piston crown surfaces becoming too cold C、formation of excessive quantities of condensate D、compression pressure being greatly reduced