The _______ is the heart of an automboile.
A: piston
B: engine
C: crankshaft
D: valve
A: piston
B: engine
C: crankshaft
D: valve
举一反三
- In a four-stroke engine, the cycle of events is completed in four<br/>strokes of(()) A: the cylinder B: the crankshaft C: the piston D: the crosshead
- The camshaft is drived by( ) A: crankshaft B: flywheel C: clutch D: piston
- Theessentialpartofthedieselengine,whosefunctionistoconverttheheatenergyintothemechanicalpower,isthe（）. A: crankshaft B: piston C: connectingrod D: bearing
- Asthe_____againreachesBDC,theexhaustvalveopens,buttheintakevalveremiansclosed. A: valve B: pump C: port D: piston
- In a two-stroke engine that uses a camshaft, each valve is opened _____ for every rotation of the crankshaft; in these engines, the camshaft rotates at the same speed as the crankshaft.In a four-stroke engine, the valves are opened only half as often; thus, _____ of the crankshaft occur for each rotation of the camshaft. A: once ... two full rotations B: twice ...two full rotations C: once ... one full rotation D: twice ... one full rotation