A、swell
B、shrinkage
C、flash off
D、lack of water
更多“When the boiler load returns to normal, the drum pressure will rise and steam bubble formation will reduce, causing a fall in water level This is known as （）.”相关的问题
A、A.when can the stevedores finish loading B、B.when will the stevedores finish loading C、C.when the stevedores can finish loading D、D.when the stevedores finish loading can
A、decelerating when lowering the load B、decelerating when raising the load C、lowering the load at constant speed D、raising the load at constant speed
A、drop as the boiler warms up B、rise as the boiler warms up C、remain unchanged until the boiler is hot enough D、rise and fall with the steam demand
A、when the boiler has been secured long enough for most solids to settle B、when the boiler has been cooled to ambient temperature C、only after raising the water level to within 0~5 inch of the high water cutout only D、after bypassing the low pressure
A、bypass exhaust gas at high loads to prevent excessive back pressure B、bypass a portion of the exhaust gas at peak loads for better efficiency C、recycle exhaust gas to the turbocharger D、minimize moisture condensation in the boiler gas passages at low loads
A、prevent engine back pressure at heavy loads B、increase total engine efficiency at low loads C、prevent boiler corrosion at low engine loads D、improve engine fuel consumption at any load
A、only when the load is taken off the cable B、only when there is a load on the cable C、only when activated by the controls at the lowering station D、at any time
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