正确答案: B

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题目：船舶应急发电机，______起动试验1次并记录，______效用试验1次并记录，30min内能连续起动______。

解析：B

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举一反三的答案和解析：

[单选题]In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to the

gudgeon pin

[单选题]绞

heave

[单选题]下列叙述中错误的是()。

锅炉安全阀的开启和关闭压力可经船员调整

[单选题]Modern handheld digital tachometers operated by counting light pulses returned to the unit by

a piece of reflective tape

[单选题]一般纤维绳子的安全负荷为断裂强度的：()

1/6

[单选题]在机舱发生大火时，若使用泡沫灭火，应使用______泡沫灭火系统

高膨胀率