A Kort nozzle is a(n)（）.

A、hollow tube surrounding the propeller used to improve thrust

B、nozzle attached to a firefighting hose

C、intake valve on a diesel engine

D、piston cylinder on a diesel engine

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更多“A Kort nozzle is a(n)（）.”相关的问题

第1题

[单选题] The all-purpose nozzle will produce a fog spray when you（）.

A、pull the nozzle handle all the way back toward the operator  B、pull the nozzle handle back to a position where the handle is perpendicular to the plane of the nozzle  C、push the nozzle handle forward as far as it will go  D、insert a fog applicator between the fire hose and nozzle  

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第2题

[单选题] Kort nozzles are installed around the propellers of some vessels to（）.

A、Increase the thrust of the propeller  B、Protect the propeller from striking sawyers  C、Prevent the propeller from striking barges towed on the ship  D、Prevent the propeller from touching bottom in low water  

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第3题

[单选题] Which method listed below is acceptable by classification society to perform hose testing to weather tight hatch covers and closing appliances（）

A、This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 2,0 kgf/cm2. The nozzle diameter is not to be less than 12mm.  B、This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 3,5 kgf/cm2. The nozzle diameter is not to be less than 5mm.  C、This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 4,0 kgf/cm2. The nozzle diameter is not to be less than 8mm.  D、This is to be carried out at a maximum distance of 2,0m with a hose pressure not less than 2,0 kgf/cm2. The nozzle diameter is not to be less than 12mm.  

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第4题

[单选题] To minimize the formation of carbon deposits on fuel injection nozzles, you should （）

A、avoid using liquid-cooled nozzles whenever possible  B、avoid low cooling water temperatures  C、avoid prolonged overloading of the engine  D、make certain the gasket seal between the nozzle and cylinder head is tight  

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第5题

[单选题] Dirt lodged on the nozzle valve seat of a fuel injection nozzle will cause（）

A、erosion and cratering of the nozzle orifices  B、fuel leakage into the nozzle drain line  C、fuel leakage before and after injection  D、insufficient fuel delivery though that nozzle  

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第6题

[单选题] When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.

A、pressure builds up in the nozzle which causes a surge of water  B、the only opening in a passageway is the one from which the nozzle is being advanced  C、pressure in the fire hose drops below 100 psi  D、a bulkhead collapses due to heat and pressure  

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第7题

[单选题] The danger of a charged hose left unattended on deck with the nozzle open is（）.

A、the hose could burst  B、the nozzle end will whip about causing damage or injury  C、water damage to vessel's cargo or structure  D、personnel might trip over the hose  