单项选择题
Diesel engine waste heat boiler construction is usually of the fire-tube or（）
A.cyclone furnace boiler type
B.dry back boiler type
C.water-tube type
D.critical circulation boiler type
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相关考题
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单项选择题
Auxiliary boilers are divided into several classifications, one of which is（）
A.fire-tube controlled circulation
B.fire-tube supercritical circulation
C.water-tube natural circulation
D.water-tube express circulation -
单项选择题
Which of the lists forms of heat transfer, if any, is illustrated by the flow of combustion gases through a boiler?（）
A.Natural convection only
B.Forced convection only
C.Both natural convection and forced convection
D.None -
单项选择题
Auxiliary boilers can be classified as（）
A.water-tube natural circulation boilers
B.fire-tube boilers
C.water-tube forced circulation boilers
D.all of the above
