搜题

【单选题】

The forced draught fan should be started and air passed through the furnace for several minutes to “（）” it of any exhaust gas or oil vapors.

A、blow

B、clean

C、scavenge

D、purge

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更多“The forced draught fan should be started and air passed through the furnace for several minutes to “（）” it of any exhaust gas or oil vapors.”相关的问题

第1题

[单选题] The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means （）

A、join with B、mix C、be equal to D、be constant

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第2题

[单选题] Stability is determined principally by the location of the point of application of two forces: the downward-acting gravity force and the（）.

A、upward-acting weight force B、downward-acting weight force C、upward-acting buoyant force D、environmental force

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第3题

[单选题] The ship’s draught forward is same as her draught aft.This condition is named as（）.

A、even keel B、even trim C、even draught D、even float

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第4题

[单选题] The ship’s draught forward is slightly deeper than the draught aft．This condition is called（）in shipping terms.

A、trim by the head B、trim by the stern C、even keel D、drafts different

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第5题

[单选题] The ship’s draught forward is as same as her draught aft. This condition is named as（）.

A、even keel B、even trim C、even draught D、even float

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第6题

[] The ship’s draught forward is slightly deeper than the draught aft. This condition is called（）in shipping terms.

A、A.trim by the head B、B.trim by the stern C、C.even keel D、D.drafts different

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第7题

[单选题] Reserve buoyancy is the（）.

A、unoccupied space below the waterline B、volume of intact space above the waterline C、excess of the buoyant force over the gravity force D、difference in the buoyant force in salt and fresh waters

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第8题

[单选题] The moment of a force is a measure of the（）.

A、turning effect of the force about a point B、instantaneous value of the force C、stability characteristics of the vessel D、center of gravity location

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第9题

[单选题] In a simple mechanical governor, the （）

A、centrifugal force rotates the ball-head B、flyweight centrifugal force is balanced by spring force C、flyweight centrifugal force is balanced by hydraulic pressure D、speeder spring alone actuates the fuel control rod

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