单项选择题
A.cylinder exhaust valve B.air starting valve C.air inlet valve D.cylinder relief valve
A piston in a four-stroke/cycle diesel engine makes fou...
单项选择题A piston in a four-stroke/cycle diesel engine makes four strokes during each （）.
A.crankshaft revolution B.mechanical cycle of operation C.period of two combustion cycles D.cycle of two events
The effective stroke of a constant-stroke, individual, ...
单项选择题The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the （）.
A.control rack B.delivery valve C.governor speed D.plunger crossbar
The ability of a fuel particle to travel into the combu...
单项选择题The ability of a fuel particle to travel into the combustion chamber before burning is called （）.
A.penetration B.permanence C.turbulence D.atomization
