單項選擇題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


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1.單項選擇題The ability of a fuel particle to travel into the combustion chamber before burning is called ().

A.penetration
B.permanence
C.turbulence
D.atomization

2.單項選擇題Proper atomization of fuel in diesel engine combustion chambers will ().

A.affect the injection pressure
B.improve combustion
C.reduce compression pressure
D.decrease power output

4.單項選擇題Which statement about diesel engine combustion is true?()

A.Combustion does not begin until the piston starts down on the power stroke
B.Maximum combustion pressure is reached before TDC
C.Turbulence in the cylinder causes a delay in ignition
D.Maximum cylinder firing pressure is not developed until the piston passes TDC

5.單項選擇題Diesel engine exhaust gas temperatures can be used to determine individual cylinder ().

A.performance
B.horsepower output
C.fuel consumption
D.scavenge effect