單項選擇題Which of the conditions listed may occur in an operating diesel engine if air pockets form within the cylinder head circulating water passages? ()

A.Hydraulic stress and distortion will develop
B.Hot spots will develop
C.Fuel oil viscosity will increased
D.An increase in trapped deposits of scale and dirt


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1.單項選擇題The two strokes of a two-stroke/cycle diesel engine are ()

A.power and intake
B.intake and exhaust
C.exhaust and compression
D.compression and power

2.單項選擇題Which of the items listed causes a direct acting mechanical governor to operate the engine fuel control linkage?()

A.Hydraulic oil pressure
B.Servomotor action
C.Flyweight centrifugal force
D.Relay motion

3.單項選擇題Combustion knock occurring in a diesel engine can be caused by ()

A.low coolant temperature
B.insufficient fuel
C.high ambient temperature
D.carbon buildup on the injector tips

4.單項選擇題Crankcase explosions in propulsion diesel result from()

A.the splashing of lubrication oil by the crankshaft
B.the dilution of crankcase oil with particles of combustion
C.broken fuel lines spraying oil on the crankcase
D.the ignition of unburned fuel and air in the crankcase