After a normal or safety shutdown automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate refiring of a burner in order for the （）.

时间：2019-04-14 22:03:36 关键词：systems,control,combustion

After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate refiring of a burner in order for the （）.

A.furnace to be re-purged

B.electric charge to buildup in the igniter

C.fuel pump to restart

D.dram level to stabilize

答案解析

A

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