单项选择题
The diesel engine valve subjected to most severe conditions of service is the （）.
A.cylinder exhaust valve
B.air starting valve
C.air inlet valve
D.cylinder relief valve
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相关考题
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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 -
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 -
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
