你可能感興趣的試題

單項(xiàng)選擇題

If both the “high level” and “l(fā)ow level” alarms come on for the same address of a centralized control console, the most likely problem is a/an （）.

A.sensor failure
B.failed alarm
C.low level
D.extremely high level

單項(xiàng)選擇題

For practical purposes, in a simple series circuit, the source voltage will be dropped across one resistor if it has（）.

A.half the resistance of the other resistor
B.a resistance equal to the other
C.at least ten times the resistance of the other
D.a partial short circuit

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The instantaneous reduction in voltage of an AC generator, resulting from an increase in load, and prior to the automatic voltage regulator correcting the situation, is called voltage （）.

你可能感興趣的試題

If both the “high level” and “l(fā)ow level” alarms come on for the same address of a centralized control console, the most likely problem is a/an （）.

For practical purposes, in a simple series circuit, the source voltage will be dropped across one resistor if it has（）.