the steam is admitted on one side of the piston and one working stroke is produced during each revolution of the crankshaft

the steam is admitted, in turn, on both sides of the piston and one working stroke is produced during each revolution of the crankshaft

the steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft

the steam is admitted, in turn, on both sides of the piston and two working strokes are produced during each revolution of the crankshaft.

1 to 2 m

1.25 to 2.25 m

1.5 to 2.5 m

1.75 to 2.75 m

La-mont boiler

Benson boiler

Loeffler boiler

all of these

Right

Wrong

feedpump

injector

feed check valve

pressure gauge