英译汉：power factor

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• 生长因子(growth factor)

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• The power factor at which a paralleled AC generator operates is usually adjusted by the （）.

  A . connected load B . prime mover speed C . field excitation D . generators rated voltage

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• 保付代理（factoring）业务

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• 英译中（Translate）：coupling factor（）

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• Equal power factors on paralleled AC generators are maintained by an automatic （）.

  A . voltage regulator B . reverse power relay C . reverse current relay D . governor control switch

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• Why is it desirable to operate paralleled AC generators at the same power factor?（）

  A . Circulating currents are kept to a minimum B . Field excitation losses are kept to a minimum C . Generator rotors will have a lesser tendency to hunt D . Because a power factor increase will decrease kilowatt output

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• With a purely （） load the voltage and current are in phase, giving a power factor of one.

  A . inductive B . resistance C . combined D . capacitate

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• In general, factors influencing transportation costs can be grouped into 2 major categories---product-related factors and market-related factors. Please find below,（）is not belong to the market-related factors.

  A . Transport distance B . Location of markets C . Freight traffic in a region D . Seasonality of product movements

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• A power-driven fishing vessel is underway on the high seas and is not engaged in fishing. Which of the following factors determines what lights she will show?（）.

  A . Whether she is normally a fishing or a trawling vessel B . Her gross tonnage C . Her length D . The type of gear she carrie

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• Which of the following types of motors is often designed for use in correcting power factor?（）

  A . Polyphase B . Wound-rotor C . Induction D . Synchronou

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• 英译汉：power curve

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• In an alternating current electrical system, a low system power factor is a direct sign of （）

  A . wasted energy B . efficient operation C . a short in the exciter field windings D . an excessive number of minor system ground

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• When voltage and current developed in an AC circuit reach their peak values at the same time, the power factor is （）

  A . lagging B . leading C . maximum D . minimum

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• The power factor of an AC generator operating singularly is determined by the （）

  A . connected load B . prime mover speed C . field excitation D . generators rated voltage

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• The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.

  A . indicated horsepower B . brake horsepower C . net horsepower D . friction horsepower

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• The alternating current generator supplying a load has a voltage drop resulted from the loadWhen the load has a lagging power factor this voltage drop （）.

  A . is small B . may be neglected C . is useful D . is considerable

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• A three-phase alternator operates at 450 volts with a power factor of 0~8.If the ammeter indicates 250 amperes, what should be the KW meter reading （）.

  A . 90~0 kw B . 127~27 kw C . 155~70 kw D . 194~85 kw

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• In the two hand model, there are 5 career success factors. Which factor is NOT a career success factor?

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• 已知函数文件如下,则factor(4)=( )function f=factor(n)if n<=1f=1;elsef=factor(n-1)*n; end

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• 已知函数文件如下，则factor(4)= （）function f=factor(n)if n<=1 f=1;else  f=factor(n-1)*n;end

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• In factoring there are 3 parties involved the exporter, the importer and the factor.

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• With a purely resistance load the voltage and current are in phase, giving a power factor of _____.

  A.one B.less than one C.more than one D.negative one

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• The power factor of an AC generator operating singularly is determined by the_______ .

  A.connected load B.prime mover speed C.field excitation D.generator's rated voltage

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• 决定一个厂商垄断势力大小的因素有哪些？简要解释每种因素。What factors determine the amount of monopoly power an individual firm is likely to have？ Explain each one briefly.

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