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单选题
In boilers, besides maintaining the burner atomizers, air diffuser vanes, fuel temperature, forced draft fan, fuel pump and other hardware in good condition, there are some adjustments on the （）that can produce a good flame for the most efficient operation.
A
fuel-air ratio
B
compression ratio
C
fuel rack
D
viscosity index
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更多 “单选题In boilers, besides maintaining the burner atomizers, air diffuser vanes, fuel temperature, forced draft fan, fuel pump and other hardware in good condition, there are some adjustments on the （）that can produce a good flame for the most efficient operation.A fuel-air ratioB compression ratioC fuel rackD viscosity index” 相关考题
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incorrectly setting the hot-well dump valveD
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