The water level in the gauge glass when a boiler is operating is _____ when the boiler is shut down.

A．lower than

B．higher than

C．below

D．equal to

[单选题]A level gauge for a tank is to （）.A . give the pressureB . give the contentsC . give the shape of the tankD . give the accuracy level

[单选题]There is ______water in the glass, is there?A.a fewB.notC.fewD.little

[单选题]The glass will( )if you pour boiling water into it.A.crackB.spoilC.splitD.c

[单选题]The water level showing in a boiler water gauge glass is usually ( ) duringworking.A．higher than the actual drum water levelB．equal to the actual drum water levelC．increasing due to steam condensation in the glassD．lower than actual drum wafer level

[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

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

[单选题]When the water produced from most evaporator is supplied for drinking purpose, it must be treated to ensure it is biologically pure and _____.A．slightly acidicB．slightly alkalineC．no saltyD．slightly bitter

[单选题]Water, when boiled, always ______ steam.A． gives inB． gives upC． gives offD． gives away

[单选题]Some doctors thinkthat you should drink a glass of water each morning. You

[单选题]Some doctors thinkthat you should drink a glass of water each morning. You