搜题

【单项选择题】

Diesel engine air start valve timing is controlled by（）

A、A.engine operating speed

B、B.an air manifold

C、C.a hydraulic distributor

D、D.individual cams and valve gear

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更多“Diesel engine air start valve timing is controlled by（）”相关的问题

第1题

[单选题] A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）

A、has little or no internal friction B、has a lower effective compression ratio C、operates with scavenge air under a positive pressure D、operates without energy absorbing intake and exhaust strokes

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第2题

[单选题] Diesel engines obtain combustion air through turbo chargers，blowers，or（）.

A、air starters B、carburetors C、natural aspiration D、air receivers

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第3题

[单选题] The most common forms of main drive used on deck auxiliaries are （）.

A、steam plants, electric motors and compressed air B、diesel engine, hydraulic machinery and compressed air C、steam plants, electric motors and hydraulic machinery D、diesel engines, steam plants and hydraulic machinery

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第4题

[单选题] The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a （）.

A、air bottle B、air compressor C、crank case D、combustion chamber

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第5题

[单选题] The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called（）.

A、engine displacement B、super-aspirating C、air injection D、supercharging

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第6题

[单选题] What is the effect of heated intake air on a diesel engine? （）

A、Increases efficiency B、Increases engine horsepower C、Increases engine life D、Reduces engine horsepower

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第7题

[单选题] When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）

A、an obstruction in an cylinder B、water accumulation in some engine cylinders C、low starting air pressure D、low scavenge air pressure

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第8题

[单选题] “This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density（）, drives the compressor directly（）

A、a modern diesel engine；a turbine wheel B、a modem diesel engine；exhaust gases C、a compressor；an exhaust gas turbocharger D、a compressor；a turbine wheel

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第9题

[单选题] Diesel engine air start system check valves are opened by （）

A、an air start cam B、cylinder compression pressure C、starting air pressure D、valve springs

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