单项选择题

Engine displacement is equal to the cylinder （）.

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

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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

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