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【单选题】

The four basic components of a fire are fuel, heat, oxygen and a chain reactionWhich of the following statements best describes what must be eliminated to extinguish a fire?（）

A、Any one component can be eliminated to extinguish a fire

B、Any two components must be eliminated to properly extinguish a fire

C、Any three components must be eliminated to properly extinguish a fire

D、Ali four components must be eliminated to extinguish any fire

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更多“The four basic components of a fire are fuel, heat, oxygen and a chain reactionWhich of the following statements best describes what must be eliminated to extinguish a fire?（）”相关的问题
第1题
[单选题] The four basic components of a fire are chain reaction, heat, fuel, and （）.

A、carbon monoxide  B、oxygen  C、carbon dioxide  D、any gaseous substance  

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第2题
[单选题] 螺旋桨有四个桨叶。 （）

A、The helm has four blades.  B、The propeller has forty blades.  C、The windlass has four blades.  D、The propeller has four blades.  

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第3题
[单选题] The four-stroke cycle is so called because it takes （） to complete the processes needed to convert the energy in the fuel into work.

A、two strokes of the piston  B、four strokes of the piston  C、one revolution of the crankshaft  D、four revolutions of the crankshaft  

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第4题
[单选题] In four strokes engine, the cycle of events is completed in four strokes of （）.

A、the cylinder  B、the crankshaft  C、the piston  D、the cross-head  

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第5题
[单选题] The ONS 15216 is a 32-channel system. The ONS 15216 OADMs are capable of adding and dropping one, two, or four channels. How are the OADMs provisioned to add and drop specific channels?（）

A、The ONS 15216 OADM can be provisioned to add/drop one, two, or four channels via Cisco Transport Manager (CTM).  B、The ONS 15216 OADM consists only of a four-channel module, and the number of ports utilized determines whether it is a one, two, or four channel OADM.  C、Three separate OADM modules are available for one, two, and four channels. The wavelengths to be dropped and added are programmable via Cisco Transport Manager (CTM).  D、The ONS 15216 OADM consists only of a single-channel module. Two-channel and four-channel support is available by stacking the single-channel module.  E、The ONS 15216 OADM is available in one, two, four channels. There are 32 single-channel OADM modules, 16 two-channel OADM modules, and 8 four-channel OADM modules.  

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第6题
[] Which of the following RAID arrays should be used to achieve the BEST fault tolerance?（）

A、A. Four drives with RAID 0  B、B. Four drives with RAID 3  C、C. Four drives with RAID 5  D、D. Four drives with RAID 10  

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第7题
[单选题] In a four-stroke engine the camshaft rotates at （）.

A、half the engine speed  B、twice the engine speed  C、the engine speed  D、four times the engine speed  

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第8题
[单选题] 用于船舶的主要油漆是底漆，内层漆和面漆。（）

A、The basic types of paint used on a ship are primer, undercoat and topcoat.  B、The basic types of paint used on a ship are topside paint, undercoat and top coat.  C、The basic types of paint used on a ship are boottopping, topside and undercoat.  D、The basic types of paint used on a ship are cement wash, undercoat and topside.  

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第9题
[单选题] In a four-stroke engines the camshaft rotates at （）.

A、half the engine rotational speed  B、twice the engine rotational speed  C、the engine rotational speed  D、four times the engine rotational speed  

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