The water level showing in a boiler water gauge glass is usually ( ) duringworking.

A．higher than the actual drum water level

B．equal to the actual drum water level

C．increasing due to steam condensation in the glass

D．lower than actual drum wafer level

[单选题]The water in an auxiliary boiler should be tested for chloride content to determine ( ).A．total dissolved solidsB．salt contaminationC．water harcnessD．chlorine contamination

[单选题]The water in an auxiliary boiler should be tested for chloride content to determine （）.A . total dissolved solidsB . salt contaminationC . water hardnessD . chlorine contaminatio

[单选题]In an auxiliary boiler steam and water system, the highest pressure will be in the （）.A . steam stop valveB . dry pipeC . feedwater systemD . generating tube

[单选题]The water level in the gauge glass when a boiler is operating is _____ when the boiler is shut down.A．lower thanB．higher thanC．belowD．equal to

[单选题]If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.A . loss of suction in the circulating pumpB . leak in the primary cooling systemC . broken raw water pump shaftD . burne

[单选题]A new water boiler was installed in our building last week, which could pro

[填空题] LOW SURGE TANK AUX.WATER LEVEL表示（）。

[单选题]The purpose of treating the cooling water of the diesel engine is to______. I、 resist the scale formation in the cooling chamber II、lubricate the engine part II III、increase thermal capacity IV、 resist corrosionA．I + IIB．II + IIIC．III + IVD．I + IV

[单选题]The purpose of treating the cooling water of the diesel engine is to____. I、 resist the scale formation in the cooling chamber II、 lubricate the engine part III、 increase thermal capacity IV、 resist corrosionA．I +IIB．II + IIIC．III + IVD．I +IV

[单选题]H．ow to operate boiler?