搜题

【单选题】

A class B fire is most successfully fought by（）.

A、preventing oxygen from reaching the burning material

B、cooling the burning material below its ignition temperature

C、using the extinguishing agent to make the burning material fire-resistant

D、using the extinguishing agent to absorb the heat

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更多“A class B fire is most successfully fought by（）.”相关的问题

第1题

[单选题] The class of fire on which a blanketing effect is essential to extinguish the fire is （）.

A、class A  B、class B  C、class C  D、class D  

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第2题

[] A fire, occurring in the windings, of an overloaded electrical motor, is considered a （）.

A、A.class "A" fire  B、B.class "B" fire  C、C.class "C" fire  D、D.class "D" fire  

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第3题

[单选题] The fire of sodium is classified as（） fire.

A、Class A  B、Class B  C、Class C  D、Class D  

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第4题

[单选题] The fire of fuel oil is classified as（） fire.

A、Class A  B、Class B  C、Class C  D、Class D  

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第5题

[单选题] The fire of electrical equipment is classified as（）fire.

A、class A  B、Class B  C、Class C  D、Class D  

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第6题

[单选题] The fire of burning paper is classified as（）fire.

A、Class A  B、Class B  C、Class C  D、Class D  

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第7题

[单选题] The fire of burning plastics is classified as （） fire.

A、Class A  B、Class B  C、Class C  D、Class D  

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第8题

[单选题] The disadvantage of using CO2 is that the（）.

A、COb>2b> does not cool the fire  B、cylinders are regulated pressure vessels  C、C0b>2b> is not effective on class B fires  D、C0b>2b> is not effective on class C fires  

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第9题

[单选题] A fire in a pile of linen is considered to be a class （）.

A、A fire  B、B fire  C、C fire  D、D fire  

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第10题

[单选题] Fires involving combustible metals are classified as （）.

A、class "A" fires  B、class "B" fires  C、class "C" fires  D、class "D" fires  

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