If ignited, which of the listed materials would be a class "B" fire?（）

A、Magnesium

B、Paper

C、Wood

D、Diesel Oil

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更多“If ignited, which of the listed materials would be a class "B" fire?（）”相关的问题

第1题

[单选题] Which of the following statements is correct concerning the “flash point ” of a liquid?（）

A、It is lower than the ignition temperature B、It is the temperature at which a substance will spontaneously ignite C、It is the temperature at which a substance, when ignited, will continue to bum D、It is the temperature at which the released vapors will fall within the explosive range

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第2题

[] If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?（）

A、A.Fuel B、B.Lubricating C、C.Cooling D、D.Ignition

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第3题

[单选题] The (auto)ignition temperature is that temperature atwhich（）.

A、no spark or flame is required to ignite gas or vapor B、a fuel begins to give off explosive vapors C、a fuel if ignited will continue to burn D、a 1% mixture of the fuel with air will explode

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第4题

[单选题] The lowest temperature at which fuel combustion becomes self-sustaining in the presence of a source of ignition, is defined as the （）

A、auto-ignition point B、flash point C、burning temperature D、fire point

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第5题

[单选题] If ignited，which material would be a class B fire?（）

A、Magnesium B、Paper C、Wood D、Diesel Oil

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第6题

[单选题] Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?（）

A、compression must be low for effective spark ignition B、compression must be low for required horsepower and torque generation C、compression must be low to prevent pre-ignition D、compression must be low to have effective pre-ignition

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第7题

[单选题] For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?（）

A、An increase in compression ratio will increase the ignition lag B、An increase in compression ratio will decrease the ignition lag C、A decrease in compression ratio will decrease the ignition lag D、A decrease in ignition lag will increase the compression ratio

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第8题

[] The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.

A、A.boiling point B、B.flash point C、C.viscosity point D、D.toxic point

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第9题

[单选题] Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?（）

A、Lubrication B、Cooling C、Fuel D、Electric ignition

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