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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

Current measuring instruments must always be connected in （）

A.series with a circuit
B.parallel with a circuit
C.series-parallel with a circuit
D.delta with the shunt

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单项选择题

The primary function of an electric motor is to （）

A.develop torque
B.generate high voltages
C.produce a magnetic field
D.generate high electrical resistance

单项选择题

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

单项选择题

If the resistance of a circuit is cut in half and the applied voltage is kept constant, the current flow will be （）.

A.doubled
B.quadrupled
C.unchanged
D.cut in half

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