单项选择题
A.area times the stroke B.area times the stroke, times the number of cylinders C.volume times the stroke D.volume times the stroke, times the number of cylinders
Auxiliary boilers are divided into several classificati...
单项选择题Auxiliary boilers are divided into several classifications, one of which is （）.
A.water-tube supercritical circulation B.water-tube forced circulation C.fire-tube controlled circulation D.fire-tube express circulation
Load control on a diesel engine is accomplished by （）.A...
单项选择题Load control on a diesel engine is accomplished by （）.
A.regulating the speed of the turbocharger B.rotating the fuel injector pump plunger C.regulating the speed of the fuel oil transfer pump D.changing engine timing
When reassembling the bowl of a disk-type centrifuge, t...
单项选择题When reassembling the bowl of a disk-type centrifuge, the bowl or locking ring is rotated （）.
A.clockwise, due to the bowl rotating clockwise B.clockwise, due to the bowl rotating counterclockwise C.counterclockwise, due to the bowl rotating clockwise D.counterclockwise, due to the bowl rotating counterclockwise
